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Large datasets are required to develop Artificial Intelligence (AI) models in AI powered smart farming for reducing farmers' routine workload, this paper contributes the first large lion-head goose dataset GooseDetectlion, which consists of 2,660 images and 98,111 bounding box annotations. The dataset was collected with 6 cameras deployed in a goose farm in Chenghai district of Shantou city, Guangdong province, China. Images sampled from videos collected during July 9 -10 in 2022 were fully annotated by a team of fifty volunteers. Compared with another 6 well known animal datasets in literature, our dataset has higher capacity and density, which provides a challenging detection benchmark for main stream object detectors. Six state-of-the-art object detectors have been selected to be evaluated on the GooseDetectlion, which includes one two-stage anchor-based detector, three one-stage anchor-based detectors, as well as two one-stage anchor-free detectors. The results suggest that the one-stage anchor-based detector You Only Look Once version 5 (YOLO v5) achieves the best overall performance in terms of detection precision, model size and inference efficiency. [ABSTRACT FROM AUTHOR]

Floating materials of both natural and anthropogenic origin affect marine ecosystems and human economic activities. Although the tracking of floating materials is important to manage the economic risks, it is difficult to trace them back to the events of origin, such as tsunamis and underwater volcanic eruptions. The gooseneck barnacle Lepas anserifera, a rapid colonizer in pelagic environments, is a potential "natural logger" of floating materials. In this study, we performed temperature-controlled culture experiments and growth line staining in the laboratory to quantify the growth increments of shells (scutum and tergum) consisting the capitulum of L. anserifera separately, and to examine the effects of the temperature on their growth. Following calcein staining, the growth lines of L. anserifera were visualized under a fluorescent microscope, and gross (capitular length and width) and individual (scutum and tergum) shell growth were compared. Shells grew in twice as much in the capitular length direction than in the capitular width direction owing to the larger growth increases in the scutum than in the tergum. Growth increments were unaffected by temperatures in the range from 20°C to 30°C, although the growth appeared to slow down in September and October compared with August. The stable oxygen isotope composition (δ18O) of the shells represented the water temperature as previously known, and the present results showed that 18O enriched in scutum than tergum in most cases. Further understanding for the biomineralization process of barnacles is required for the precise application of environmental proxies in barnacle shells. [ABSTRACT FROM AUTHOR]

Males and females have long shown disparities in body weight and height; yet, the underlying mechanisms influencing growth and development remain unclear. Male and female Zhedong White Geese (ZDW) geese have long been selected for large body size and egg production, respectively. This led to a large difference in body weight between males and females, making them a unique model for studying the effects of sex on growth and development. This study aimed to elucidate these mechanisms by comparing the transcriptomes of muscle and pituitary tissues in male and female ZDW geese to identify the critical genes responsible for the effects of sex on growth performance. Our analysis revealed 1101 differentially expressed genes (DEGs) in leg musculature (507 upregulated, 594 downregulated), 773 DEGs in breast musculature (311 upregulated, 462 downregulated), and 517 DEGs in the pituitary gland (281 upregulated, 236 downregulated) between male and female geese. These DEGs were significantly enriched in gene ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways associated with endocrine metabolism (e.g., hormonal activities), muscle formation (e.g., sarcomere and myofibril), and bone formation (e.g., bone morphogenesis and cartilage formation). The upregulated genes in males were enriched in KEGG pathways involving nutrient digestion and absorption (vitamin and protein), as well as the secretion of digestive juices (gastric acid and bile). Through protein–protein interaction analyses, we also observed high-density gene networks related to muscle fiber development, calcium ion metabolism, mitochondrial respiratory chain, and bone development. Therefore, our multi-tissue transcriptome analysis provides a deeper understanding of the complex and systematic gender-driven effects on growth and development in geese. IGF1, GHRHR, and NCAPG-LCORL and pathways related to myogenesis might play vital roles in gender differences before hormones exert their effect. [ABSTRACT FROM AUTHOR]

Our study presents the assembly of a high-quality Taihu goose genome at the Telomere-to-Telomere (T2T) level. By employing advanced sequencing technologies, including Pacific Biosciences HiFi reads, Oxford Nanopore long reads, Illumina short reads, and chromatin conformation capture (Hi-C), we achieved an exceptional assembly. The T2T assembly encompasses a total length of 1,197,991,206 bp, with contigs N50 reaching 33,928,929 bp and scaffold N50 attaining 81,007,908 bp. It consists of 73 scaffolds, including 38 autosomes and one pair of Z/W sex chromosomes. Importantly, 33 autosomes were assembled without any gap, resulting in a contiguous representation. Furthermore, gene annotation efforts identified 34,898 genes, including 436,162 RNA transcripts, encompassing 806,158 exons, 743,910 introns, 651,148 coding sequences (CDS), and 135,622 untranslated regions (UTR). The T2T-level chromosome-scale goose genome assembly provides a vital foundation for future genetic improvement and understanding the genetic mechanisms underlying important traits in geese. [ABSTRACT FROM AUTHOR]

Since 2017, an infectious goose gout disease characterized by urate precipitation in viscera, mainly caused by novel goose astrovirus (GoAstV) infection, has emerged in the main goose-producing region of China. The current challenge in managing goose gout disease is largely due to the absence of a rapid and efficient detection method for the GoAstV pathogen. Notably, the potential application of immunosensors in detecting GoAstV has not yet been explored. Herein, a label-free PEC immunosensor was fabricated by using purchased TiO2 as the photoactive material and antibody against GoAstV P2 proteins as the specific recognition element. First, we successfully expressed the capsid spike domain P2 protein of ORF2 from GoAstV CHSH01 by using the pET prokaryotic expression system. Meanwhile, the polyclonal antibody against GoAstV capsid P2 protein was produced by purified protein. To our knowledge, this is the first establishment and preliminary application of the label-free photoelectrochemical immunosensor method in the detection of AstV. The PEC immunosensor had a linear range of 1.83 fg mL−1 to 3.02 ng mL−1, and the limit of detection (LOD) was as low as 0.61 fg mL−1. This immunosensor exhibited high sensitivity, great specificity, and good stability in detecting GoAstV P2 proteins. To evaluate the practical application of the immunosensor in real-world sample detection, allantoic fluid from goose embryos was collected as test samples. The results indicated that of the eight positive samples, one false negative result was detected, while both negative samples were accurately detected, suggesting that the constructed PEC immunosensor had good applicability and practical application value, providing a platform for the qualitative detection of GoAstV. [ABSTRACT FROM AUTHOR]

This article aimed to detect the existence of barley-specific Nikita and Sukkula retrotransposons in domestic geese samples and to evaluate the evolutionary relationships between these and other transposons belonging to the family Anatidae. Inter-retrotransposon-amplified polymorphism-polymerase chain reaction (IRAP-PCR) method was performed for these retrotransposons movements in three diverse domestic goose populations (Chinese × Embden crossbred, Turkish White, and Turkish Multicolor). Polymorphism ratios were between 0 and 33% in all samples for Nikita and 0–73% in all samples for Sukkula. In addition, intrapopulation genetic polymorphism rates were also 0–15% in Chinese × Embden crossbred, 0–25% in Turkish White, 0–25% in Turkish Multicolor for Nikita; while 0–27% in Chinese × Embden, and 0–50% in Turkish Multicolor for Sukkula. There was no polymorphism for Sukkula among Turkish White samples. Moreover, the neighbour-joining method was used for phylogenetic tree construction using 38 sequences of different ducks, geese, and swans. In silico analyses supported the transitions of retrotransposons in the family Anatidae. It is concluded that transposon mobility among the phylogenetically distant species may lead to understanding evolutionary relationships. This report is one of the first studies investigating retrotransposon movements in domestic geese, revealing a new perspective on the goose genome regarding mobile genetic elements. [ABSTRACT FROM AUTHOR]

Cues to individuality, and the corresponding capacity for individual-level discrimination, can allow individually specific investment by conspecifics into offspring, partners, neighbors or competitors. Here we investigated possible cues to individuality via faces in an ancient avian lineage, the Greylag Goose (Anser anser). Konrad Lorenz could famously name each Greylag Goose in 'his' flock from a photograph. Confirming this anecdotal observation, we developed facial recognition software that can reliably (~ 97% accuracy) assign a goose face to a goose ID within a database, using bill morphology normalized during photo preparation. To explore conspecific detection of individuality cues, we erected life-size photos of geese and measured subjects' responses to photos of themselves (unfamiliar goose), their partner, and another flock mate. Geese displayed significantly greater affiliative response to photos of their partners, providing evidence that geese can use two-dimensional images as cues to determine social category (partner/non-partner) and/or individual-level recognition. Our methods provide novel approaches to automatically detect and monitor geese and to test avian cognition. Our approach may also create new opportunities for species monitoring approaches more generally using photographic images and citizen-science engagement. [ABSTRACT FROM AUTHOR]

Goose and swan populations have increased concurrently with environmental degradation of wetlands, such as eutrophication, vegetation losses, and decrease in biodiversity. An important question is whether geese and swans contribute to such changes or if they instead benefit from them. We collected data from 37 wetlands in southern Sweden April − July 2021 to study relationships between geese, swans and other waterbird guilds, macrophytes, invertebrates, as well as physical and water chemistry variables. Neither goose nor swan abundance was negatively correlated with other trophic levels (abundance, richness, or cover). On the contrary, goose or swan abundances were positively related to abundances of surface and benthic feeding waterbirds, cover of specific macrophytes, and to invertebrate richness and abundance. Moreover, invertebrates (number of taxa or abundance) were positively associated with abundance of several waterbird guilds and total phosphorous with surface feeders, whereas water colour was positively (surface feeders) or negatively (benthic feeders) related. We conclude that waterbirds are more abundant in productive wetlands and that geese and swans do not show clear deleterious effects on other trophic levels included in this study. However, patterns may be masked at the species level, which should be addressed in further studies, complemented with experimental studies of grazing impact. [ABSTRACT FROM AUTHOR]

The use of essential oils has recently increased in the poultry sector. The aim of this study was to investigate the effects of essential oil mixture (juniper, mint, oregano and rosemary oil) on fatty acid oxidation and lipogenic gene expression in geese. Research groups were formed as C (control; no additives), EK1 (0.4 ml/l essential oil mixture supplemented) and EK2 (0.8 ml/l essential oil mixture supplemented). Relative expression levels of genes included in lipogenesis (ACCα, ChREBP, FASN, LXRα and SREBP-1) expression levels of genes included in fatty acid oxidation (ACOX1, CPT1, CPT1A, PPARα and PPARγ) were measured using RT-qPCR. Group EK1 upregulates the mRNA expression levels of genes involved in lipogenesis such as ACCα, ChREBP and SREBP-1, while it downregulates the mRNA expression in levels of all genes involved in fatty acid oxidation. Group EK2 increases the mRNA expression levels of genes involved in lipogenesis such as ACCα, FASN and SREBP-1, while it decreased mRNA expression at the levels of all genes involved in fatty acid oxidation, as in the other group. In the study, adding an essential oil mixture to drinking water is predicted to increase fatty liver because it upregulates genes related to fat synthesis (lipogenesis) and downregulates genes related to fat degradation (fatty acid oxidation). [ABSTRACT FROM AUTHOR]

The Barnacle Goose experienced a precipitous depression in numbers in the middle of the last century. The improvement of measures to protect the species in Western European wintering grounds and climate warming in the Arctic caused an increase in the numbers of the species and a southward expansion of the range from the Arctic islands to the mainland coastal tundra over the last decades of the 20th century. Isolated breeding centers of the Barnacle Goose formed in places of migration stopovers on the coasts of the Baltic Sea and in wintering areas on the coasts of the North Sea. Since the last decade of the past century, the species has begun to settle in the boreal zone of Northwestern Russia. Based on original data from the authors and an analysis of the pertinent literature, the process of Barnacle Goose dispersal in Leningrad oblast, the Republic of Karelia, and Murmansk oblast and the change in its status from a rare visitor to a mass migrant and common, but locally spread, breeding species are examined in detail. The main features of the species' phenology, landscape and habitat distribution, and breeding biology are considered. The exponential growth of the abundance of this species occurring synchronously both in the Subarctic and in new nesting sites in the boreal and temperate climatic zones of Europe suggests that an active microevolutionary process is taking place against the background of the impact of climate change and improved protection of the species, thus making it possible to consider the Barnacle Goose as an interesting model species for various populational studies. [ABSTRACT FROM AUTHOR]

Despite the availability of more and more data on Arctic biotic communities, even the principal course of their transformation remains unclear. Differences in the population dynamics of geese, lemmings, and ruminants covering more than 98% of the Arctic terrestrial ecosystem recycling and competing for common trophic resources on the basis of specialization are of great interest. Comparing 15 species of the taxa, we showed that grades of their morphophysiological adaptation to phytophagy are matched to empirical estimates of their food selectivity, thereby describing their trophic specialization distribution. Thus, in the Arctic herbivore communities, the selectivity distribution is just as stable as specialization. Populations of trophic specialists in these communities, the most glaring examples of which are the muskox and the snow goose, generally exceed in size and/or growth rate the populations of generalists, which include lemmings and the smallest black geese. The specialist populations have mainly higher size and/or growth rate than the generalist populations. It may be concluded that interspecific competition influences the contemporary transformation of the Arctic herbivore communities much more strongly than environmental factors such as global warming and human activity do. [ABSTRACT FROM AUTHOR]

Improve the scientific level of the goose breeding industry and help the development of intelligent agriculture. Instance Segmentation has a pivotal role when the breeders make decisions about geese breeding. It can be used for disease prevention, body size estimation and behavioural prediction, etc. However, instance segmentation requires high performance computing devices to run smoothly due to its rich output. To ameliorate this problem, this paper constructs a novel encoder-decoder module and proposes the SDSCNet model. The reasonable use of depth-separable convolution in the module reduces the number and size of model parameters and increase execution speed. Finally, SDSCNet model enables real-time identification and segmentation of individual geese with the accuracy reached 0.933.We compare this model with numerous mainstream instance segmentation models, and the final results demonstrate the excellent performance of our model.Furthermore, deploying SDSCNet model on the embedded device Raspberry Pi 4 Model B can achieve effective detection of continuous moving scenes. [ABSTRACT FROM AUTHOR]

Amid intensive transformations in the Arctic environment and biota, differences in population trends demonstrated by predominant and widespread Arctic herbivores are of great scientific interest. In this regard, the primary purpose of this study was to perform a comparative assessment of trophic selectivity in the barnacle goose and greater white-fronted goose in the area of their highest reproductive concentrations and estimate the role of competition in their population dynamics. The data indicate that differences in quantitative shares of plants consumed by these species are not sufficient to avoid competition and that the diet of barnacle geese is more selective (i.e., sensitive to food quality and energy consumption). However, the status of a relatively weak competitor contradicts the exponential growth of the barnacle goose population in the study area, as well as its entire Arctic population. We believe that differences in the population dynamics of barnacle goose and greater white-fronted goose are currently determined not by competition in reproductive concentration periods, but by effects exercised by anthropogenic and climatic factors far outside of their nesting range. [ABSTRACT FROM AUTHOR]

Endoscopes have revolutionised and have added a new dimension to the surgical domain. Many surgical techniques have reformed from the open surgical approach to a minimal access endoscopic one. In otolaryngology too, the indications and the use of endoscopes have been increasing in the last few decades. Even in otology, slowly and steadily Wulstein's microscopic techniques have been changing to endoscopic techniques. The only disadvantage of endoscopic ear surgery is that it is a single handed technique as the non dominant hand is utilised in holding the endoscope. We have developed portable endoscope holder based on the Goose neck system with rack and pinion mechanism. The goose neck system acts as a third arm to hold the endoscope. The novel portable endoscope holder bears the potential to provide benefits for various endoscopic ear nose and throat surgeries. We present our experience of feasibility and applicability of this endoscope holder. [ABSTRACT FROM AUTHOR]

The conventional power systems are evolving as smart grids. In recent times cyberattacks on smart grids have been increasing. Among different attacks, False Data Injection (FDI) is considered as an emerging threat that has significant impact. By exploiting the vulnerabilities of IEC 61850 Generic Object-Oriented Substation Events (GOOSE) and Sampled Values (SV) attackers can launch different FDI attacks. In this paper, a real-time set up capable of simulating FDI on GOOSE and SV protocols is developed to evaluate the impact of such attacks on power grid. IEC 62351 stipulates cybersecurity guidelines for GOOSE and SV, but only at communication or Information Technology (IT) level. Hence there is a need to develop a holistic security both at IT and Operation Technology (OT) level. In this regard, a novel sequence content resolver-based hybrid security scheme suitable to tackle FDI attacks on GOOSE and SV is proposed. Furthermore, the computational performance of the proposed hybrid security scheme is presented to demonstrate its applicability to the time critical GOOSE and SV protocols. [ABSTRACT FROM AUTHOR]

Vigilance, a crucial factor affecting the behaviour of birds, is key to the safety of migratory animal flocks against predators and other threats. We examined the vigilance of White-fronted Geese in the Biebrza Basin (NE Poland), one of their major stopover sites in Europe. The study took place during their spring staging, from the end of February until the beginning of April. We found that the vigilance of White-fronted Geese decreased in the centre of mixed flocks with Greylag Geese. This may be associated with the larger size and wider field of view of Greylag Geese, as well as their territorial behaviour, as some of them belong to the local breeding population. White-fronted Geese can benefit from the group-size effect when they form larger flocks. In the presence of a vigilance stimulus, the individuals in the centre of a flock raised their alertness levels. As the probability of detecting danger is higher in large groups, flock size negatively affected the birds' vigilance. Owing to their different experience and roles (adults care for their broods by being vigilant), adult birds appeared to be vigilant on both grassland and arable land, whereas immatures were vigilant only on arable land, where exposure to predatory pressure was greater. We believe that the lower level of vigilance of White-fronted Geese in large and mixed flocks may give them more time for foraging and, therefore, improve their chances of survival and breeding success during the oncoming spring. [ABSTRACT FROM AUTHOR]

Ruddy-headed goose Chloephaga rubidiceps has a migratory population that overwinters mainly in the Pampas region, Argentina, and breeds in Southern Patagonia. This population has decreased considerably, with less than 800 individuals remaining to date. We conducted the first assessment on the influence of environmental and anthropogenic-impact (wind farms and high-voltage networks) variables on ruddy-headed goose migration pathways across the Patagonian coast by applying kernel density analyses and statistical procedures. We used satellite tracking data obtained from six ruddy-headed geese during their migration pathways between 2015 and 2018. Five core distribution areas were identified during migration. During autumn migration, core areas were associated with high primary productivity and low elevation areas, while during spring migration they were located in the proximity of watercourses and waterbodies. We found that more than 30% of the grid cells included in the influence area of high-voltage networks overlapped with high-density areas for ruddy-headed geese during both migrations. Around 30% of the grid cells included in the influence zone of wind farms overlapped with high-density areas for ruddy-headed goose during autumn migration; while this applied to only 13% during spring migration. We highlight areas of high-risk along the distributional range of the species where large-scale patterns of collision mortality are likely to occur and mitigation measures should be prioritized. We suggest proactive measures that could mitigate future collisions with energy infrastructure because, given their threatened status, a few deaths may have a large effect on the small remnant population. [ABSTRACT FROM AUTHOR]

Novel goose astrovirus (NGAstV) is a member of the genus Avain Avastrovirus (AAstV) and the family Astroviridae. NGAstV-associated gout disease has caused huge economic losses to the goose industry worldwide. Since early 2020, NGAstV infections characterized by articular and visceral gout emerged continuously in China. Herein, we isolated a GAstV strain from goslings with fatal gout disease and sequenced its complete genome nucleotide sequence. Then we conducted systematic genetic diversity and evolutionary analysis. The results demonstrated that two genotypic species of GAstV (GAstV-I and GAstV-II) were circulating in China, and GAstV-II sub-genotype IId had become the dominant one. Multiple alignments of amino acid sequences of GAstV capsid protein revealed that several characteristic mutations (E456D, A464N, and L540Q) in GAstV-II d strains, as well as additional residues in the newly identified isolate which varied over time. These findings enrich the understanding of the genetic diversity and evolution of GAstV and may facilitate the development of effective preventive strategies. [ABSTRACT FROM AUTHOR]

Performing migratory journeys comes with energetic costs, which have to be compensated within the annual cycle. An assessment of how and when such compensation occurs is ideally done by comparing full annual cycles of migratory and non-migratory individuals of the same species, which is rarely achieved. We studied free-living migratory and resident barnacle geese belonging to the same flyway (metapopulation), and investigated when differences in foraging activity occur, and when foraging extends beyond available daylight, indicating a diurnal foraging constraint in these usually diurnal animals. We compared foraging activity of migratory (N = 94) and resident (N = 30) geese throughout the annual cycle using GPS-transmitters and 3D-accelerometers, and corroborated this with data on seasonal variation in body condition. Migratory geese were more active than residents during most of the year, amounting to a difference of over 370 h over an entire annual cycle. Activity differences were largest during the periods that comprised preparation for spring and autumn migration. Lengthening days during spring facilitated increased activity, which coincided with an increase in body condition. Both migratory and resident geese were active at night during winter, but migratory geese were also active at night before autumn migration, resulting in a period of night-time activity that was 6 weeks longer than in resident geese. Our results indicate that, at least in geese, seasonal migration requires longer daily activity not only during migration but throughout most of the annual cycle, with migrants being more frequently forced to extend foraging activity into the night. [ABSTRACT FROM AUTHOR]

In northern Norway, an increasing population of Greylag Geese (Anser anser) forages considerably on dairy grassland and can eat up to 60% of the grass (dry matter mass) on a field if allowed to eat undisturbed throughout the growing season. In this study, the seasonal foraging behavior of Greylag Geese on diary grassland was continuously monitored with game cameras from late April to the end of August to be able to pinpoint effective preventive measures to manage, control, and prevent this crop damage. Limited, but regular, lethal scaring was conducted on some fields to reveal the preventive effect of this measure. Foraging from Greylag Geese in a rangeland area was also monitored, and a complete dataset of seasonal foraging behavior of this species is presented here. Greylag Geese foraging on the fields reaches a top between 04:00 and 08:00 h am, all season. Energy and digestibility of the field grass (timothy) did not reveal any correlation with grazing patterns. Greylag Geese do not visit the fields during molting; however, they may visit fields with their chicks to forage. Lethal scaring completely removes visits from Greylag Geese on the fields where this is conducted, while foraging continues if geese are given undisturbed access. In the rangeland area foraging seems to be even and continuous throughout the season, but significantly lower. In the end of June and late July/early August, there is a peak in visits and number of geese per visit on the fields. Preventive and effective measures against crop damage from Greylag Geese must therefore at least be initiated during late June and early August, and between 04:00 and 08:00 am. [ABSTRACT FROM AUTHOR]

Adaptive flyway management of superabundant geese is emerging as a strategy to reduce damage to agricultural crops and other ecosystem disservices, while also ensuring sustainable use and conservation objectives. Given the calls for intensified hunting as part of flyway management in Europe, we need to increase the understanding of structural, situational, and psychological factors important for goose hunting among hunters. Our survey data, retrieved in southern Sweden, showed a higher potential to intensify hunting among goose hunters than other hunters. In response to hypothetical policy instruments (including regulations, collaborative, and others), hunters declared a minor increase in their intention to hunt geese, with the greatest expected increase among goose hunters should the hunting season be extended. Situational factors (e.g., access to hunting grounds) were associated with goose hunting (frequency, bag size, and intention to increase hunting). In addition, controlled motivation (derived from external pressures or to avoid guilt) and more importantly autonomous motivation (due to hunting being enjoyable or valuable) were along with goose hunter identity positively associated with goose hunting. Hunters' involvement in flyway management may be encouraged by using policy instruments to remove situational barriers and facilitate their autonomous motivation. [ABSTRACT FROM AUTHOR]

Stakeholder involvement in wildlife management is important and requires knowledge about factors motivating such participation. With several goose populations increasing in Europe and goose management incorporating multiple objectives, involvement of stakeholder groups with diverse interests is needed. In this study, we examined how evaluations of geese (attitude and acceptance capacity), but also experiences of birdwatching and birdwatcher identity, were associated with willingness to participate in local goose management. A survey among members of Sweden's largest birdwatching organization was conducted (n = 5010). The majority of respondents, 64%, displayed a divided evaluation of geese, most frequently in terms of an overall positive attitude towards geese but a low acceptance for current goose population levels (i.e. acceptance capacity). Birdwatchers' willingness to participate in goose management was generally low. Whereas they were more willing to take part in goose counts (i.e. monitoring) than to participate in local goose management groups, they were least willing to contribute to mitigating crop damage through scaring geese. Results further revealed that birdwatchers with a divided evaluation of geese and an entirely positive evaluation displayed the highest willingness to participate in goose management. However, a stronger distinct birdwatcher identity as a result of more birdwatching experiences was even more strongly associated with higher willingness to take part in goose management. The results highlight a need to intensify efforts to engage stakeholder groups with an interest in conservation issues in the participatory goose management system in Europe. [ABSTRACT FROM AUTHOR]

Arctic-nesting geese face energetic challenges during spring migration, including ecological barriers and weather conditions (e.g., precipitation and temperature), which in long-lived species can lead to a trade-off to defer reproduction in favor of greater survival. We used GPS location and acceleration data collected from 35 greater white-fronted geese of the North American midcontinent and Greenland populations at spring migration stopovers, and novel applications of Bayesian dynamic linear models to test daily effects of minimum temperature and precipitation on energy expenditure (i.e., overall dynamic body acceleration, ODBA) and proportion of time spent feeding (PTF), then examined the daily and additive importance of ODBA and PTF on probability of breeding deferral using stochastic antecedent models. We expected distinct responses in behavior and probability of breeding deferral between and within populations due to differences in stopover area availability. Time-varying coefficients of weather conditions were variable between ODBA and PTF, and often did not show consistent patterns among birds, indicating plasticity in how individuals respond to conditions. An increase in antecedent ODBA was associated with a slightly increased probability of deferral in midcontinent geese but not Greenland geese. Probability of deferral decreased with increased PTF in both populations. We did not detect any differentially important time periods. These results suggest either that movements and behavior throughout spring migration do not explain breeding deferral or that ecological linkages between bird decisions during spring and subsequent breeding deferral were different between populations and across migration but occurred at different time scales than those we examined. [ABSTRACT FROM AUTHOR]

IEC 61850 is emerging as a popular communication standard for smart grids. Standardized communication in smart grids has an unwanted consequence of higher vulnerability to cyber-attacks. Attackers exploit the standardized semantics of the communication protocols to launch different types of attacks such as false data injection (FDI) attacks. Hence, there is a need to develop a cybersecurity testbed and novel mitigation strategies to study the impact of attacks and mitigate them. This paper presents a testbed and methodology to simulate FDI attacks on IEC 61850 standard compliant Generic Object-Oriented Substation Events (GOOSE) protocol using real time digital simulator (RTDS) together with open-source tools such as Snort and Wireshark. Furthermore, a novel hybrid cybersecurity solution by the name of sequence content resolver is proposed to counter such attacks on the GOOSE protocol in smart grids. Utilizing the developed testbed FDI attacks in the form of replay and masquerade attacks on are launched and the impact of attacks on electrical side is studied. Finally, the proposed hybrid cybersecurity solution is implemented with the developed testbed and its effectiveness is demonstrated. [ABSTRACT FROM AUTHOR]

We develop a unified theory with endogenous technology choice in human/knowledge capital accumulation to obtain a rich array of development paradigms. The transition from a less productive technology to a more productive one occurs via endogenous technology choice without requiring any force of big push. However, technologies that are more productive face higher scale barriers and thus multiple steady states may appear with each of which being associated with a different technology. We characterize global dynamics and establish conditions under which middle-income trap or flying geese growth may arise in equilibrium. By calibrating the general model to the data from several representative economies at different development stages with different growth patterns, we identify various prolonged flying geese episodes and middle-income traps. The analysis shows that while improving the efficacy of human capital accumulation is more crucial for advanced and fast-growing economies, mitigating barriers to human capital accumulation is more rewarding for emerging growing economies and development laggards. Our growth accounting results indicate that once the efficacy of and the barriers to human capital accumulation are incorporated, the residual TFP component no longer plays a substantial quantitative role. [ABSTRACT FROM AUTHOR]

The South-to-North Water Diversion Project (SNWDP) is a significant and costly cross-basin mega water project in China, and one aim is to improve water use efficiency. To assess the effect of the SNWDP, this study conducts a quantitative evaluation of the middle route of the SNWDP's impact on water use efficiency through the event analysis method based on panel data from 2010 to 2019 of 14 cities along the middle route. The results show the construction of the SNWDP has had a positive impact on water use efficiency in the areas along the project, and the water use efficiency is constantly improving. Further empirical analysis shows that regional groundwater supply, industrial water consumption, and technical level have a significant positive impact on regional water use efficiency. Regional per-capita GDP has a significant negative impact on water use efficiency. The results can provide a scientific basis and decision-making reference for optimizing the SNWDP. [ABSTRACT FROM AUTHOR]

Vertebrate herbivore excrement is thought to influence nutrient cycling, plant nutrition, and growth; however, its importance is rarely isolated from other aspects of herbivory, such as trampling and leaf removal, leaving questions about the extent to which herbivore effects are due to feces. We hypothesized that as a source of additional nutrients, feces would directly increase soil N concentrations and N2O emission, alleviate plant, and microbial nutrient limitations, resulting in increased plant growth and foliar quality, and increase CH4 emissions. We tested these hypotheses using a field experiment in coastal western Alaska, USA, where we manipulated goose feces such that naturally grazed areas received three treatments: feces removal, ambient amounts of feces, or double ambient amounts of feces. Doubling feces marginally increased NH4+-N in soil water, whereas both doubled feces and feces removal significantly increased NO3−-N; N2O flux was also higher in removal plots. Feces removal marginally reduced root biomass and significantly reduced productivity (that is, GPP) in the second year, measured as greater CO2 emissions. Doubling feces marginally increased foliar chemical quality by increasing %N and decreasing C:N. Treatments did not influence CH4 flux. In short, feces removal created sites poorer in nutrients, with reduced root growth, graminoid nutrient uptake, and productivity. While goose feces alone did not create dramatic changes in nutrient cycling in western Alaska, they do appear to be an important source of nutrients for grazed areas and to contribute to greenhouse gas exchange as their removal increased emissions of CO2 and N2O to the atmosphere. [ABSTRACT FROM AUTHOR]

The Russian breeding population of barnacle geese Branta leucopsis has shown a rapid increase in numbers since 1980, which has coincided with a southwest-wards breeding range expansion within the Russian Arctic. Here barnacle geese also started to occupy coastal and marsh land habitats, in which they were not know to nest on their traditional breeding grounds. While these changes have been well documented by studies and observations throughout the new breeding range of barnacle geese, observations are lacking from the traditional breeding grounds on Novaya Zemlya, as this area is remote and difficult to access. This is especially relevant given rapid climate warming in this area, which may impact local distribution and population size. We used GPS-tracking and behavioural biologging data from 46 individual barnacle geese captured on their wintering grounds to locate nest sites in the Russian Arctic and study nesting distribution in 2008–2010 and 2018–2020. Extrapolating from nest counts on Kolguev Island, we estimate the breeding population on Novaya Zemlya in 2018–2020 to range around 75,250 pairs although the confidence interval around this estimate was large. A comparison with the historical size of the barnacle goose population suggests an increase in the breeding population on Novaya Zemlya, corresponding with changes in other areas of the breeding range. Our results show that many barnacle geese on Novaya Zemlya currently nest on lowland tundra on Gusinaya Zemlya Peninsula. This region has been occupied by barnacle geese only since 1990 and appears to be mainly available for nesting in years with early spring. Tracking data are a valuable tool to increase our knowledge of remote locations, but counts of breeding individuals or nests are needed to further corroborate estimates of breeding populations based on tracking data. [ABSTRACT FROM AUTHOR]

An analysis of the data of the ring recoveries from bean geese (Anser fabalis), ringed from 1960 to 2013 on wintering grounds in the Netherlands, where a subspecies was indicated for a significant part of the birds (A. f. fabalis or A. f. rossicus), is given. Most of the finds were registered on the territory of the former Soviet Union, mainly in the Russian Federation. The hypothesis is tested that the subspecies A. f. fabalis is exposed to more hunting pressure than A. f. rossicus. To test this, a comparison is made of the survival periods of birds of the two subspecies and an analysis of the seasonal distribution of finds of ringed birds. The average life expectancy of A. f. fabalis (compared to A. f. rossicus), a long-term shift in the timing of production in the direction of spring hunting, and the possible change in wintering regions of the bean goose (increase in the importance of Eastern European wintering) as another reason for the sharp decrease in the number of wintering A. f. fabalis in the Netherlands are discussed. [ABSTRACT FROM AUTHOR]

Geese are herbivorous birds that play an essential role in the agricultural economy. We construct the chromosome-level genome of a Chinese indigenous goose (the Xingguo gray goose, XGG; Anser cygnoides) and analyze the adaptation of fat storage capacity in the goose liver during the evolution of Anatidae. Genomic resequencing of 994 geese is used to investigate the genetic relationships of geese, which supports the dual origin of geese (Anser cygnoides and Anser anser). Chinese indigenous geese show higher genetic diversity than European geese, and a scientific conservation program can be established to preserve genetic variation for each breed. We also find that a 14-bp insertion in endothelin receptor B subtype 2 (EDNRB2) that determines the white plumage of Chinese domestic geese is a natural mutation, and the linkaged alleles rapidly increase in frequency as a result of genetic hitchhiking, leading to the formation of completely different haplotypes of white geese under strong artificial selection. These genomic resources and our findings will facilitate marker-assisted breeding of geese and provide a foundation for further research on geese genetics and evolution. A chromosome-level genome assembly of the Xingguo gray goose enables deeper insight into Chinese indigenous geese genetic origins and evolution. [ABSTRACT FROM AUTHOR]

Bar-headed geese (Anser indicus) are adaptable to plateau environments. In this study, we sequenced and assembled a high-quality chromosome-level genome of the bar-headed goose using PacBio long reads and Hi-C technique, and generated 115.73 Gb of Illumina short-reads and 95.89 Gb of PacBio long-reads. The assembled bar-headed goose genome, with a contig N50 of 5.734 Mb and a scaffold N50 of 65.77 Mb, is 1.129 Gb in length and includes 33 chromosomes and 451 fragments. BUSCO assessment yielded a completeness score of 94.4%. In total, 15,376 protein-coding genes were predicted, of which 94.95% had homologs in protein databases. We identified 78 positively selected genes (PSGs) in the bar-headed goose genome, which were mainly enriched in calcium ion and ATP-binding. This bar-headed goose genome will be an important resource for increasing our understanding regarding the genetic basis of adaptation to life at a high altitude. Measurement(s) Response to hypoxia Technology Type(s) PacBio long reads and Hi-C technique [ABSTRACT FROM AUTHOR]

Mark-recapture studies enable us to estimate population parameters such as survival, if marks do not impact survival and if marks are not lost. Mark loss can result from external wear and damage, but also behavioural factors may be important and could explain differences between seasons or sexes. We studied Greylag Geese (Anser anser) in eastern Netherlands, ringed with neckbands, leg bands and metal rings (912 geese), observed weekly during 1997–2019 (131,625 observations). Given the double marking and high annual resighting probabilities (neckbands: 0.974, leg rings: 0.639), we quantified neckband loss and the effect of neckbands on apparent survival, using multistate mark-recapture models. Annual neckband loss was 0.038, was higher in males (0.056) than females (0.021) and increased with years since marking, up to 0.098 for males more than 8 years after marking. Neckband loss tended to be higher during December–May than June–November, with most losses occurring in March–April. Both the higher loss in males and the peak in spring in both sexes could result from intraspecific fighting (pulling each other's neck and neckband). Survival was underestimated in Cormack-Jolly-Seber models that did not account for neckband loss, by up to 0.096 for adult males 6–7 years after marking. Thus, ignoring neckband loss may give erroneous survival differences between sexes and seasons, and overestimate the effect of ageing on survival (i.e. senescence). We did not detect an effect of neckbands on mortality, but statistical power for this test was limited. Neckband loss, although lower nowadays than in studies of decades ago, still impacts survival estimates and should be considered in mark-recapture studies. [ABSTRACT FROM AUTHOR]

Agroforestry systems, which are based on the integration of trees and animals, represent a useful practice for implementing the "One Welfare" concept. Geese could adapt well to these systems due to their kinetic and grazing abilities. However, the lack of specific ethograms and animal-based measures have not yet allowed a deep assessment of their welfare and behavior. The aim of this study was to develop and validate a protocol to evaluate the behavior of geese reared in two agroforestry systems (i.e., apple orchard and vineyard). Thus, a behavior observation form (BOF) including a specific ethogram was proposed, and its interobserver reliability, content, criterion and construct validity were determined. Moreover, the influence of the time of day and type of agroforestry system on geese's behavior was also investigated. Agreement and principal component analyses, as well as the comparison between data collected through direct observation by the BOF and indirect observation by a computerized system, supported the reliability and validity of the proposed protocol. While the BOF also highlighted differences in the behavior expressed by the geese according to the time of day and the environmental context, both the vineyard and apple orchard systems seem to meet their biological and behavioral needs. [ABSTRACT FROM AUTHOR]

Waterfowl parvovirus, duck enteritis virus and goose astrovirus have become serious pathogens in waterfowl farming. Co-infections occasionally occur, and as a result, it is much harder to rapidly and simultaneously identify several pathogens using conventional PCR. According to the characteristics of the goose parvovirus (GPV) and muscovy duck parvovirus (MDPV) genome sequences, a universal PCR primer was designed using Rep1 as the target gene. The specific detection primers were designed based on the specific conserved regions of UL54 of the duck enteritis virus (DEV) gene and ORF1a of the goose astrovirus (GAstV) gene. The PCR reaction system and conditions were optimized, and the optimal annealing temperature was found to be 56.2 ℃. The volume ratio of the GPV–MDPV, GAstV and DEV primers (20 μM) was 1:4:5. The established multiplex PCR detection method can simultaneously detect GPV, MDPV, DEV and GAstV within one reaction, and be negative for duck Tembusu virus, muscovy duck reovirus, duck hepatitis A virus type 3 and duck circovirus. The method with excellent sensitivity, specificity and repeatability was successfully applied to clinical samples, it is a useful platform for identifing co-infections of GPV, MDPV, DEV and GAstV in waterfowl. [ABSTRACT FROM AUTHOR]

Fully digitalized substations using IEC 61850 process bus are being introduced all over the world. Numerous utilities have featured pilot projects, demonstrators or even industrial scale deployment of these Fully Digital Protection, Automation and Control Systems (FD-PACS). Product standards such as profiles for Instrument Transformers have been developed and published (IEC 61869-6 and IEC 61869-9 by TC 38—Instrument Transformers). This raises the question about the standards for digitally interfaced protection functions. In 2016, IEC TC 95 (Measuring relays and protection equipment) charged a working group to investigate this subject and to elaborate recommendations concerning requirements and testing of protection IED with digital inputs and outputs for protection standards (IEC 60255-1xx series). For protection functions, publisher/subscriber based data streams are supposed to comply with IEC 61850 and IEC 61869 standards. This holds in particular for Sampled Values (SV) representing energising inputs of the protection function, and is also applicable to Generic Object Oriented Substation Event (GOOSE) which can be used for input or output of protection functions. Quality attributes of published data depend on the operational and connection status of the function and the hosting IED. In addition, protection functions have to take into account the information regarding the time synchronisation of the received SV and other parameters. This paper gives an overview of these features and the proposed way to take them into account in the IEC 60255 standard series. It describes the progress of WG 2 and relates it to existing standardization documents. [ABSTRACT FROM AUTHOR]

This paper extends research on innovating firms' access to finance in the creative industries. While we know that entrepreneurial firms experience barriers to applying for funding and difficulties in securing positive outcomes, prior studies have shown that firms may use patents to signal innovative quality to potential investors. Yet these studies typically focus on R&D-oriented innovation in 'traditional' technological sectors. Creative industries firms have different innovation characteristics that may influence the funding process, including the uncertainty of content-based product markets, the highly-imbalanced information asymmetries between creative entrepreneurs and conservative investors, and the symbolic and intangible nature of their innovations. Using the UK's Creative Industries Council's unique cross-sectional survey data of 575 firms we analyse the extent to which innovating firms seek to apply to and achieve funding from a wide range of potential sources. We find little evidence that prior innovative activities provide a meaningful signal, positive or negative, to potential funders for creative industries firms. This suggests that the highly intangible and symbolic nature of innovation in creative industries businesses is unreliable as an indicator of quality. The reliance of owners on personal capital is congruent with recent literature on the high levels of social and personal capital among workers in the creative industries. We suggest that the specific challenges creative firms face may be addressed through new financial and policy instruments to feed and sustain these high-growth, innovating industries. [ABSTRACT FROM AUTHOR]

Barnacle Geese wintering in an intensively farmed area in Southeast Denmark were GPS tagged in early March. Twenty tagged geese selected large open (especially permanent) grasslands above relative availability and close to their roosts, although winter cereals were also used. During March and April all tagged birds left the area and moved to coastal grasslands in other parts of Denmark, the German Wadden Sea or Southern Sweden, some up to 210 km diametrically opposite to the main migratory direction towards the Russian Arctic. The unexpected long distance dispersal may be caused by lack of suitable short-grazed coastal grasslands in the study area. [ABSTRACT FROM AUTHOR]

Significant population growth of some European goose populations has led to initiatives to implement management at the flyway level. Understanding migration routes and spatiotemporal distribution is crucial for the successful and coordinated management of migratory species such as geese. In this study, we describe movements across the entire annual cycle in 76 Greylag geese (Anser anser) fitted with GPS tracking devices at five catch sites in Sweden. We show that Greylag geese breeding in Sweden still use a NE-SW migration path. However, the wintering range has undergone a northward shift during the last decades. Compared to previous studies, our data suggest a continued reduction in migration distance, being most pronounced in birds in southernmost Sweden. Greylag geese tagged in southernmost Sweden spent almost the entire annual cycle in Sweden and Denmark (97 and 100% of all GPS locations). In contrast, the flyway of Greylag geese from the northern catch sites still covers countries from Sweden to Spain, but presently, only a small fraction of the population migrates to Spain. Instead, most of the annual cycle is spent in Sweden, Denmark, the Netherlands, or Germany. The contrasting spatiotemporal distribution in geese of different geographical origin indicates that management initiatives for the NW/SW European Greylag Goose population need to consider that different migration strategies occur within previously defined management units. As a consequence, coordination of management actions (e.g. monitoring, harvest quotas, reserves) may need to consider different spatial scales, i.e. from the regional to the international scale depending on the origin of the Greylag geese. [ABSTRACT FROM AUTHOR]

Duck short beak and dwarfism syndrome (SBDS) is a viral infectious disease caused by novel goose parvovirus (NGPV), which has been responsible for serious economic losses to the Chinese duck industry in recent years. Currently, there is no effective vaccine against this disease. In this study, we developed an inactivated virus vaccine candidate for SBDS based on NGPV strain DS15 isolated from a duck in China. Immune efficacy was evaluated in 112 ducks, which were randomly divided into vaccination, challenge-control, vaccination-challenge, and blank control groups (28 per group). Clinical characteristics, antibodies, virus excretion, viremia, and pathological changes were monitored. No morbidity or death was observed in the immunized ducks, which showed normal weight and a good mental state. High levels of serum antibodies (optical density at 450 nm of ~ 0.63) were detected in ducks immunized with the inactivated vaccine at 7 days post-vaccination (dpv), and the titer of virus-neutralizing antibodies increased from 1:23 to 1:28.5 from 7 to 42 dpv. Measurement of the viral load in anal swab, serum, and tissue samples showed that vaccination significantly inhibited the replication of NGPV in immunized ducks. Moreover, NGPV could not be isolated from the spleens of immunized or vaccinated and challenged ducks. Collectively, these results demonstrate that the newly developed inactivated NGPV vaccine, administered in an oil emulsion adjuvant, possesses good immunogenicity and represents a potentially powerful tool for SBDS prevention and control. [ABSTRACT FROM AUTHOR]

Implementing management objectives may be challenging when decisions are made at different scales than where they are supposed to be carried out. In this study we present a situation where local goose hunting arrangements respond to objectives in an international management plan for pink-footed geese (Anser brachyrhynchus) and a local wish to reduce goose numbers as means to reduce grazing damage on farmland. A unique ten-year dataset provides an evaluation of the efficiency of voluntary actions at a local scale for implementing a policy of population control of geese, and general lessons are drawn for collaboration and co-production of knowledge for adaptive management. The study demonstrates how both the hunters and geese adapt in a situation where increasing the harvest of geese is the main objective. Introducing hunting-free days and safe foraging areas significantly increased goose numbers in the study area, with a corresponding increase in hunting success in terms of number of harvested geese. The geese's behavioural response to hunting also triggered the hunters to adapt accordingly by optimal timing and placement in the landscape. Based on the results of the present study we suggest a framework for local implementation of management actions. Bringing end-users on board, facilitates processes and strengthens the achievements, as they represent the actors where implementation occurs. Specifically, our findings demonstrate how optimal goose hunting can be practiced by the use of an adaptive framework with active stakeholder participation. [ABSTRACT FROM AUTHOR]

Macrobrewers initially responded to the rapid growth of the craft beer segment by product differentiation: offering versions of their own "craft beer." When this proved unsuccessful, they began acquiring independent craft brewers. We examine the consequences of Anheuser-Busch InBev's acquisition of Goose Island. We find large gains in sales for craft brewers post-acquisition, which suggests that marketing spillovers attracted new consumers to craft beer. We also find large negative effects on product variety, which suggests greater difficulty for craft brewers gaining shelf space in off-premise accounts. These variety effects are particularly pronounced in Goose Island's regional "birthplace": Illinois. [ABSTRACT FROM AUTHOR]

The outbreak of goose gout disease caused by novel goose astrovirus type 1 (GAstV-1) has resulted in huge economic losses to the goose industry in China since 2017. However, little is known about the B cell epitopes in major antigen of GAstV-1 and the serological approach for detection of GAstV-1 is not available. In this study, three novel monoclonal antibodies (mAbs) against the ORF2 protein were first generated and designated as 3G6, 5H7, and 6C6, respectively. Epitope mapping revealed that mAb 3G6, 5H7, and 6C6 recognized 695AVRFEKGGHE704, 685EKALSAPQAG694, and 635DDDPLSDVTS644 in ORF2, respectively. Sequence alignments found that the three epitopes were highly conserved in GAstV-1 but not in other AAstV members. Moreover, a mAb-based sandwich ELISA for the detection of GAstV-1 was first developed using mAb 6C6. The sandwich ELISA only reacted with GAstV-1 but not with GAstV-2 and the other goose-associated viruses tested. The limit of the detection of the sandwich ELISA reaches 1.58 × 103 TCID50/mL of GAstV-1. Notably, mAb 6C6 could also efficiently react with the GAstV-1 in tissue frozen sections of the clinical infected goose through IFA. The mAbs generated in this study pave the way for further studying on the role of ORF2 in the infection and pathogenesis of GAstV, and the sandwich ELISA and the tissue frozen section-IFA approaches established here provide efficient and rapid serological diagnostic tools for detection of GAstV-1. Key points: • Three novel B cell epitopes were identified in ORF2 of GAstV-1. • mAb-based ELISA and IFA for detection of GAstV-1 were developed. [ABSTRACT FROM AUTHOR]

Most European goose populations have increased exponentially, and this has increasingly brought them into conflict with human activities. To manage this conflict, we used multi-criteria decision analysis to help set population targets for a super-abundant population of greylag geese (Anser anser). We relied on expert elicitation to assess the consequences of varying goose abundance on nine ecological, economic, and societal objectives. Representatives from national governments and from non-governmental organizations then weighted the objectives based on their perceived relative importance, and we used a consensus-convergence model to reach stakeholder agreement on the tradeoffs among objectives. The preferred population targets for two management units represent about a 20% reduction from current abundances, which from a management perspective would require considerable effort above and beyond current population-control measures. We believe that multi-criteria decision analysis can provide a systematic and transparent framework for building consensus among diverse stakeholders in a wide array of human-wildlife conflicts. [ABSTRACT FROM AUTHOR]

Upland Goose Chloephaga picta, Ashy-headed Goose Chloephaga poliocephala and Ruddy-headed Goose Chloephaga rubidiceps are endemic goose-like threatened birds of southern South America. This work aimed to study how sheldgeese are distributed both temporally and spatially and characterize their habitat use in part of their breeding range in Southern Argentina, a little-explored subpolar region. We conducted nine surveys between spring 2013 and summer 2016 across a maximum of 235 km in Santa Cruz and 698 km in Tierra del Fuego per survey. We recorded the presence of non-breeding sheldgoose groups and Upland Goose pairs. We collected data at site-scale (~ 0.8 km2) and extracted data from geographic information systems for landscape-scale (5 km2) analyses. We recorded 2396 non-breeding groups containing one, two or the three species, 788 Upland Goose pairs and 102 solitary individuals. The Upland Goose was present in almost all groups and was the most abundant sheldgoose, followed by the Ashy-headed Goose. The Ruddy-headed Goose was observed only in 15 locations. Poa grasslands, meadows and Festuca grasslands were the habitats in which we detected most individuals. Sheldgoose density was higher in Tierra del Fuego than in Santa Cruz, and increased from spring to autumn and decreased in winter. The largest sheldgoose groups were concentrated in meadows and waterbodies. Sheldgeese selected sites with greater habitat diversity, habitat richness and number of habitats patches. Our results provide information to understand which environmental conditions favour sheldgeese and to aid in the selection of important areas for the conservation of these species. [ABSTRACT FROM AUTHOR]

In the 20th century, the breeding grounds of the barnacle goose over the territory of Russia included only the Novaya Zemlya Archipelago and Vaygach Island. Until the middle of the century, the population did not exceed 20 000–30 000 individuals. In the 1970s–1980s, the population of the barnacle goose started increasing slowly. Shortly thereafter new colonies appeared in the coastal areas of the Barents Sea, ranging from the Kanin Peninsula to Khaypudyrskaya Bay and Kolguev Island. By 2017, the population numbers had reached about 1.2 million individuals. The increase in the barnacle goose population has coincided with the phase of a pronounced temperature increase and general climate change in the Arctic. The mean annual temperatures have increased significantly in the Eastern European tundra. A simultaneous ice cover decline in the Barents Sea has led to spreading of the warm Atlantic waters much further to the east and thus rendering a heating effect extending as far as the Kara Sea. One of the consequences is a steady decrease in weather differences between the western and eastern parts of the region. The climate in the eastern part, in Vaygach Island and the Yugor Peninsula in particular, has become milder and changes relatively faster than in the western part of the region. This is believed to be one of the reasons for the vast expansion of the barnacle goose to the east and to Kolguev Island. In the spring period, in May and June, the average daily temperatures in the Eastern European tundra have not changed significantly over the past 35 years, but taking into account the lack of a pronounced temperature increase, the transition of the mean daily temperature over 0°C has shifted to a much earlier period. On the territory of the Eastern European tundra, the cumulative temperature of the summer period has increased along with the duration of the period with positive temperatures. These factors combined have led to a prolonged vegetation period and have enhanced phytomass growth. This trend is most pronounced in the post-hatching period, i.e., in July and August. The prolongation of the active vegetation period offers young barnacle geese additional advantages in one of the most crucial periods of their life, i.e., the fledging period. Adult birds have an additional opportunity to accumulate internal reserves before the autumn migration. Apparently, all these factors combined seem to have allowed for new habitats on marshes and in the typical plain tundra to be used by barnacle geese, leading to a significant increase in the numbers of the species. More detailed information obtained now fails to support the hypothesis stipulating the adverse impact of a phenological mismatch on the barnacle goose. The species continues demonstrating steady population growth. According to our estimations, there are 1 069 107 ± 37 655 barnacle geese in the Russian part of its range (excluding the Novaya Zemlya Archipelago). [ABSTRACT FROM AUTHOR]

Both the Yamal–Belyi and Gydan populations of the wild reindeer (Rangifer tarandus) are endangered with no exact reasons. In this puzzle it is very important to analyze the reindeer diet on Belyi and Shokalskii islands of the Arctic Ocean, where its populations are mainly concentrated in summer, especially in order to compare them with greater white-fronted (Anser albifrons) and brant (Branta bernicla) geese that use the same food resources. The herbivores are shown to feed on more than 40 plant species on those islands. The more mobile species using more habitat types show more diverse diets, but both food diversity and food selectivity depend on their morphophysiological features. Both white-fronted goose populations are more abundant than both brant goose populations and continue growing, while the brant goose populations have a stable trend. This agrees with the broader and less selective diet of white-fronted goose compared to the brant goose diet. However, both reindeer populations on the islands, although showing the widest and least selective diet, undergo a sharp decline which is therefore not influenced by food competition. This only allows us to suggest the maintenance of usual reservation rules on the islands, which can provide at least equal initial conditions in using the limited resources for all herbivore species. [ABSTRACT FROM AUTHOR]

Purpose: Gastrointestinal nematodes are one of the most important constraints of poor geese health and productivity, in addition to being involved in great economic losses for various poultry sectors. This study primarily aimed at determining the epidemiological profile and risk factors associated with the occurrence of gastrointestinal (GI) nematode parasites in geese in Egypt. The phylogenetic relationships between heterakids were the second aim. Methods: For achieving these aims, a total 180 of intestinal samples were screened for the presence of gastrointestinal nematodes over a period of one year from December 2018 to November 2019. Furthermore, A PCR-based DNA sequencing of the mitochondrial NADH dehydrogenase subunit1 gene (nad1) was conducted for characterization of adult Heterakis dispar. Results: The current search revealed that the overall prevalence was 33.33% (60/180). Five species of nematode species was encountered in this study, namely Capillaria spp., Heterakis gallinarum (Schrank, 1788), Ascaridia galli (Schrank, 1788), Subulura brumpti (Lopez-Neyra, 1922) and Heterakis dispar (Schrank, 1790). A positive relationship was found between the prevalence of nematode infection and age of tested geese revealing that the high prevalence was found in adults rather than young birds (P = 0.03). Moreover, there was no significant difference in the prevalence of nematode infection between male and female geese (P > 0.05). Also, there was strong significant seasonal trends in the prevalence of the recovered helminths with the maximum infection was observed in summer season and lowest in winter (P = 0.002). The BLAST analysis of H. dispar nad1 sequence showed a 96.4% similarity with the sequences of H. dispar Heilongjiang. It also showed a lower similarity to the mitochondrial gene sequences of H. gallinarum (84.4%). This is the first molecular identification and report of genetic diversity of Heterakis dispar in geese from Egypt. Conclusions: The current finding initially provides a concise account of knowledge about the epidemiology of gastrointestinal nematodes infecting geese and are considered as a starting point for the implementation of appropriate control and prophylactic schemes for GIT nematodiasis. It also confirms the potential uses of genetic techniques for taxonomic studies of different parasites. [ABSTRACT FROM AUTHOR]

A triangular lingual prominence (LP) is a characteristic part of the tongue in Anseriformes containing adipose tissue. The parakeratinized epithelium (PEp) covers the LP. Studies aimed to describe the histogenesis of PEp during the process of the intensive formation of the LP in domestic goose during embryonic period and to determine the structural readiness to perform a protective function. The study were conducted by using LM, SEM and TEM technique. The results revealed that on day 16th the undifferentiated epithelium of LP transformed into the typical avian multilayered epithelium. Contrary to pattern of histogenesis of parakeratinized epithelium on the lingual body, on the medial and lateral areas of the elongating and bulging LP were formed epithelial furrows. Which around 20th day, on lateral areas of LP deepened up to half of epithelium, whereas on the medial area began to fade. The ultrastructure of cells lying in furrows indicated progressive apoptosis-like degeneration. On the 25th day, shallow furrows were only present on lateral areas, where bulging of LP was continued. Whereas the epithelium on medial area started cornification by the accumulation of cytokeratin fibers. Lack of the periderm during the development of the PEp of the LP indicated its endodermal origin. [ABSTRACT FROM AUTHOR]

Many polar species and habitats are now affected by man-made global climate change and underlying infrastructure. These anthropogenic forces have resulted in clear implications and many significant changes in the arctic, leading to the emergence of new climate, habitats and other issues including digital online infrastructure representing a 'New Artic'. Arctic grazers, like Eastern Russian migratory populations of Tundra Bean Goose Anser fabalis and Greater White-fronted Goose A. albifrons, are representative examples and they are affected along the entire flyway in East Asia, namely China, Japan and Korea. Here we present the best publicly-available long-term (24 years) digitized geographic information system (GIS) data for the breeding study area (East Yakutia and Chukotka) and its habitats with ISO-compliant metadata. Further, we used seven publicly available compiled Open Access GIS predictor layers to predict the distribution for these two species within the tundra habitats. Using BIG DATA we are able to improve on the ecological niche prediction inference for both species by focusing for the first time specifically on biological relevant population cohorts: post-breeding moulting non-breeders, as well as post-breeding parent birds with broods. To assure inference with certainty, we assessed it with 4 lines of evidence including alternative best-available open access field data from GBIF.org as well as occurrence data compiled from the literature. Despite incomplete data, we found a good model accuracy in support of our evidence for a robust inference of the species distributions. Our predictions indicate a strong publicly best-available relative index of occurrence (RIO). These results are based on the quantified ecological niche showing more realistic gradual occurrence patterns but which are not fully in agreement with the current strictly applied parsimonious flyway and species delineations. While our predictions are to be improved further, e.g. when synergetic data are made freely available, here we offer within data caveats the first open access model platform for fine-tuning and future predictions for this otherwise poorly represented region in times of a rapid changing industrialized 'New Arctic' with global repercussions. [ABSTRACT FROM AUTHOR]

Abstract—This paper studies the differences in the trophic resource use in the breeding time between the snow goose Anser caerulescens that is the most abundant in the Arctic and the most widespread brant goose Branta bernicla under the conditions of the main part of the snow goose nesting range (Colville River Delta, Alaska). It was found that the diets of these species consist mainly of grasses and shrubs and to a lesser extent of mosses, sedges, horsetails and forbs, having almost no differences in the composition of resource items. It also was found that both species have the highest foraging costs in coastal habitats and the lowest ones have in marsh habitats. Without significant differentiation of trophic niches, the snow goose has significantly lower foraging costs than the brant goose. A probable transformation mechanism of communities including the species based on their trophic interactions was suggested. [ABSTRACT FROM AUTHOR]