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The parent–offspring conflict in avian species encompasses resource allocation and a balance necessary for survival for both parties. Parental investment is modulated according to various factors, among which begging is important. Endogenous hormones, particularly corticosterone (CORT), play a role in modulating begging behavior. However, most studies on hormonal regulation of begging behavior induced elevated hormone levels in the offspring through feeding or injections, thus, limiting our knowledge of the evolution of the parent–offspring conflict under natural conditions. In this study, we aimed to identify the key signals that parents respond to during interactions with their nestlings in the wild, considering factors such as endogenous hormone CORT, nestling age, and brood size, which may affect nestling begging behavior. Begging performance was evaluated by measuring the begging frequency and score of the red‐whiskered bulbul (Pycnonotus jocosus), along with assessing CORT levels in feathers. CORT levels were significantly correlated with both the begging frequency and score of nestlings, while variables such as body mass and tarsus length did not influence parental feeding frequency. Additionally, factors such as the number of nestlings (brood size), age, and begging frequency were predictors of parental feeding frequency. Our findings indicate that begging frequency, nestling age, and brood size are signals that help navigate the intricacies of the parent–offspring conflict and that parents may rely on these key signals from the range of begging cues exhibited by nestlings to adjust their feeding strategies. [ABSTRACT FROM AUTHOR]

In many bird species, nestling begging signals play a key role in the interaction between parents and their offspring during development. The information conveyed by begging calls can be disrupted by anthropogenic noise, which is one of the major threats to biodiversity in increasingly urbanized landscapes. Here, we describe the developmental change in acoustic structure of begging calls in nestling Eurasian Blue Tits Cyanistes caeruleus; begging calls are pure‐tone, low‐frequency, soft calls during the first days of development and gradually turn into white‐noise, hiss‐like, powerful calls of broadband frequency. This strong developmental variation highlights the importance of an extended sampling scheme in developmental studies. Furthermore, we pinpoint two phases where begging calls could be most vulnerable to masking by anthropogenic noise. First, during early development, begging calls are very soft and low‐pitched, closer to high‐intensity noise bands of traffic noise. Secondly, around day 11, begging calls show reduced tonality, which implies higher degradation, and relatively low amplitude, which implies reduced signal range. We encourage future research to describe acoustic development of begging calls in other species, to provide a robust foundation that will make noise mitigation policies more effective. [ABSTRACT FROM AUTHOR]

Nestlings normally exhibit a mix of traits that attract parental care, such as postural and vocal begging and carotenoid‐based mouth colouration. These signals are hypothesised to be signs of nestling needs (vocal begging) and quality (mouth colouration). Therefore, we hypothesised that broods, where nestlings beg for less time and display more saturated carotenoid‐based mouth colouration, would have lower nestling mortality. We tested these predictions in two wild blue tit (Cyanistes caeruleus) populations. The breeding success (here defined as the proportion of eggs that produced fledglings) was related to nestling mouth flanges' carotenoid‐based colour saturation. This means that blue tits that raised nestlings with more coloured flanges had a higher within‐population breeding success. Time spent in vocal begging, by contrast, was not associated with breeding success. Hence, our findings reveal that some communication signals displayed by nestlings (carotenoid‐based colouration) predict breeding success, in our study mostly reflecting the proportion of eggs that hatched, while begging intensity does not, probably because the former reflects a better maternal pre‐laying condition and nestling physiological status in the mid‐term. [ABSTRACT FROM AUTHOR]

The article discusses the concept of federalism and presents two different approaches to understanding it: ideological and institutional. Ideological approaches define federalism based on normative ideals and emphasize the balance of competing ideals. Institutional approaches view federalism as a specific institutional form with distinct features and requirements. The author argues for adopting an institutional approach to federalism, which focuses on the adoption of federations and the allocation of decision-making authority. This approach provides a clearer understanding of federalism and can guide debates on authority allocation within federations. [Extracted from the article]

A recent study by Antonson et al. claims to have found evidence of a niche construction strategy in brown-headed cowbirds. The authors suggest that cowbird nestlings selectively manipulate host brood reduction to favor the presence of two warbler nestlings in the nest. However, the study selectively cites publications and raises questions about the size of the parasitic nestling relative to its host nestmates and the evolution of such a complex adaptation in a generalist brood parasite. The authors also do not address the effect of difference in size between host and brood parasite nestlings or the rate of multiparasitism. Until these issues are resolved, the results only support the begging assistance hypothesis and may be a consequence of the provisioning capacity of the host species. [Extracted from the article]

In this paper, I challenge the Consequence Argument for Incompatibilism by arguing that the inference principle it relies upon is not well motivated. The sorts of non‐question‐begging instances that might be offered in support of it fall short. [ABSTRACT FROM AUTHOR]

The anthropology of Pacific cultures spotlights social conflict as a proximate cause of suicide. Ethnographic accounts suggest that suicidal behaviors are high‐cost conflict‐resolution strategies. We investigate parent‐child conflicts and the strategies adolescents and young adults use to resolve them, using concepts from human behavioral ecology to interpret results from in‐depth, semi‐structured interviews with 58 Chon Chuuk participants. One strategy for resolving conflicts in one's favor is to impose costs through the threat or use of violence, but an alternative strategy for those who lack social power or formidability involves social withdrawal, or withholding cooperation, until the interdependent parties reach an agreement. The Chuukese term amwunumwun refers to a spectrum of social withdrawal, including avoidance, running away, and suicide. Strategies involving withholding cooperation were the most reported child behavioral response. As predicted, low‐cost strategies, such as negotiation, were associated with nonsevere conflicts (e.g., playing with friends), whereas high‐cost withholding cooperation, such as running away, was associated with severe conflicts (e.g., labor exploitation). Importantly, withholding cooperation was often, but not always, associated with outcomes favoring the child. We propose that withholding cooperation is a culturally ubiquitous strategy, ranging from avoidance to suicidality, used by the powerless to achieve more favorable outcomes. [adolescence, parent‐offspring conflict, suicide, Micronesia] [ABSTRACT FROM AUTHOR]

This article describes the social and economic organization of migration for begging from Romania to Norway. Drawing on a survey among homeless Romanians in Oslo and qualitative interviews conducted in Norway and migrant‐sending communities in Romania, we describe how migrants gain access to resources such as information, transport, places to beg and places to sleep, as well as social and emotional support when abroad. We argue that the particular, clustered structure of these migration flows makes migration available to persons who otherwise would not have opportunities to migrate, eases their adaptation in cities of destination and serves to protect the migrants from exploitation and abuse from external actors. This migration structure does, however, reflect a strong dependence on kinship networks, which may create vulnerabilities in itself. [ABSTRACT FROM AUTHOR]

This contribution makes the case for a shift in boundaries between the (populist) radical right and the extreme right, arguing for the systematic use of the term 'far right'. The significance of a deliberately generic but fundamentally meaningful concept such as 'far right' is motivated by the growing links between illiberal‐democratic ('radical right') and anti‐democratic ('extreme right') collective actors. This begs considering the conceptual grounds for differentiation among far‐right collective actors, their underlying dynamics, and why it is important to look at what they do to tackle this phenomenon in practice—that is, to extrapolate their ideological essence and their varying allegiances to democracy. The complexity of far‐right politics questions the long‐standing conceptual distinctions internally defining it. The use of an umbrella concept may thus enhance precision in the discussion of this phenomenon, at the same time highlighting the unfolding of a new phase in nativist politics. [ABSTRACT FROM AUTHOR]

Begging signals are widespread in animals and have been extensively studied in the context of brood care. In contrast, the functionality of begging signals expressed among adults has not yet been scrutinised experimentally. Norway rats (Rattus norvegicus) have been shown to express 50‐kHz calls towards a social partner when in need of help to obtain food. Here, we tested with help of playbacks whether focal subjects exposed to a high rate of ultrasonic calls would increase their helping rate towards their social partner. The propensity to help a partner was significantly enhanced when the focal rats were exposed to playback with a doubled number of calls relative to baseline conditions. To the best of our knowledge, this provides the first evidence of increased help in response to an experimentally altered begging signal in adult animals. [ABSTRACT FROM AUTHOR]

The emergence over the last decade of large numbers of vulnerable EU citizens begging on Swedish streets has led to ambivalent responses from the Swedish state, including from local police forces charged with policing public order. Based on research including interviews with vulnerable EU citizens and with police officials in two socio‐economically divergent areas of Stockholm, this paper seeks to understand how policing practices are motivated and enacted towards this group and how these practices are experienced by those targeted. The results reveal a set of policing practices which, whilst framed within a depoliticised logic of what Nicholas Blomley calls "pedestrianism", work to produce spatially uneven punitive landscapes for those begging. The paper argues that understanding the role of police as "street‐level bureaucrats" (following Michael Lipsky), with the agency to escalate or soften revanchist landscapes, is fundamental to understanding the contingencies at the heart of punitive urbanisms. [ABSTRACT FROM AUTHOR]

Similar to other signals, coloration of traits expressed by nestlings while they are begging for food are assumed to reflect their phenotypic conditions, and, therefore, they should be environmentally determined. However, these colorations are also species specifics and, thus, a genetic component explaining the evolution of nestling coloration should exist; a possibility rarely explored in the literature.Cross‐fostering experiments allowed us to quantify genetic and environmental components of coloration of mouth, flanges and skin in a spotless starling Sturnus unicolor population. In addition, by supplementing some nestlings within each brood with non‐pigmented antioxidants (Vitamin E or Vitamin complex), we explored the effects of food supplementation on coloration of begging‐related traits and plasma carotenoid concentration.We detected significant genetic components of colorations of skin and mouth, but not of flanges or plasma carotenoid concentration. Moreover, experimental supplementation with Vitamin E affected UV coloration of mouth, flanges and skin, while vitamin‐complex supplementation exclusively affected flange coloration. Furthermore, coloration of flanges, but not that of other traits, predicted plasma carotenoid concentration suggesting a direct link between these two traits.All these results suggest that coloration of begging‐related traits is a multifaceted signal informing parents about genetic characteristics, and of short‐term needs of nestlings, including antioxidative capacity, that parents could use to adjust feeding efforts, and deciding which chick to feed.Future research should focus on the parents' perspective, taking into account their feeding effort and feeding preferences in relation to genetically and/or environmentally determined coloration of begging‐related traits. A free Plain Language Summary can be found within the Supporting Information of this article [ABSTRACT FROM AUTHOR]

Offspring mortality varies dramatically among species with critical demographic and evolutionary ramifications, yet the causes of this variation remain unclear. Nests are widely used for breeding across taxa and thought to influence offspring mortality risk. Traditionally, more complex, enclosed nest structures are thought to reduce offspring predation by reducing the visibility of nest contents and muffling offspring sounds compared to open nests. Direct tests of the functional bases for nest structure influence on predation risk are lacking.We used experiments and 10 years of observational data to examine how nest structure influences nest predation risk in a diverse community of tropical songbirds. First, we examined how nest size was related to nest structure and nest predation rates across species. Second, we assessed how nest structure influences the detectability of nestling begging calls both in field and in laboratory settings. Finally, we examined how the acoustic properties of different nest structures influence nest predation risk. Specifically, we experimentally broadcast begging calls from open and enclosed nests to determine how auditory cues and nest structure interact to affect predation on plasticine and quail eggs. We also tested whether nest structure was associated with differences in nest predation rates between the incubation (no begging cues) and nestling (begging cues) stages.We found that enclosed nests are larger than open nests after accounting for adult size, and larger nests had increased predation rates. Moreover, enclosed nests did not consistently alter nestling begging calls in ways that reduce the likelihood of predation compared to open nests. Indeed, begging cues increased predation rates for enclosed but not open‐cup nests in our playback experiment, and nest predation rates showed greater increases after hatching in enclosed than open‐cup nests.Ultimately, enclosed nests do not necessarily provide greater predation benefits than open nests in contrast to long‐standing theory. A free plain language summary can be found within the Supporting Information of this article. [ABSTRACT FROM AUTHOR]

Honest signaling mechanisms can function to appropriate care to hungry offspring and avoid misdirected care of unrelated offspring. Begging, the behavior by which offspring solicit food and parental care, may be an honest signaling mechanism for need, as well as association of parents and offspring. Roseate terns (Sterna dougallii) exhibit prolonged parental care during the postbreeding staging period, offering an ideal system in which to study begging as an honest signaling mechanism. We conducted focal sampling during two premigratory staging seasons (2014 and 2015) at Cape Cod National Seashore, Massachusetts, USA to determine whether postfledging tern begging behavior was an honest signal for need and parent–offspring association. Based on honest signaling theory, we expected begging behavior to be highest during times of high perceived need, and we expected to see a decrease in begging behavior as young terns became increasingly independent of the care‐giving parent. Also, we predicted that young terns would be more likely to beg at parents than nonparents. We found that young roseate terns begged at their parents more often than nonparents; however, they did not always beg at parents. Model predictions of begging probability showed a linear relationship between begging and time of day and date of season, such that begging increased with time of day and decreased with date of season, respectively. Our results provide evidence for honest parent–offspring interactions and are inconsistent with parent–offspring conflict theory but suggest that begging may play a complex role in postfledging parent–offspring interactions. OPEN RESEARCH BADGES: This article has been awarded Open Data, Open materials Badges. All materials and data are publicly accessible via the Open Science Framework at https://doi.org/10.5281/zenodo.2656718. [ABSTRACT FROM AUTHOR]

Offspring are selected to demand more resources than what is optimal for their parents to provide, which results in a complex and dynamic interplay during parental care. Parent–offspring communication often involves conspicuous begging by the offspring which triggers a parental response, typically the transfer of food. So begging and parental provisioning reciprocally influence each other and are therefore expected to coevolve. There is indeed empirical evidence for covariation of offspring begging and parental provisioning at the phenotypic level. However, whether this reflects genetic correlations of mean levels of behaviors or a covariation of the slopes of offspring demand and parental supply functions (= behavioral plasticity) is not known. The latter has gone rather unnoticed—despite the obvious dynamics of parent–offspring communication. In this study, we measured parental provisioning and begging behavior at two different hunger levels using canaries (Serinus canaria) as a model species. This enabled us to simultaneously study the plastic responses of the parents and the offspring to changes in offspring need. We first tested whether parent and offspring behaviors covary phenotypically. Then, using a covariance partitioning approach, we estimated whether the covariance predominantly occurred at a between‐nest level (i.e., indicating a fixed strategy) or at a within‐nest level (i.e., reflecting a flexible strategy). We found positive phenotypic covariation of offspring begging and parental provisioning, confirming previous evidence. Yet, this phenotypic covariation was mainly driven by a covariance at the within‐nest level. That is parental and offspring behaviors covary because of a plastic behavioral coadjustment, indicating that behavioral plasticity could be a main driver of parent–offspring coadaptation. In this study, we measured parental provisioning and begging behavior at two different hunger levels using canaries (Serinus canaria) as a model species. Then, using a covariance partitioning approach, we estimated whether the covariance predominantly occurred at a between‐nest level (i.e., indicating a fixed strategy) or at a within‐nest level (i.e., reflecting a flexible strategy). We found positive phenotypic covariation of offspring begging and parental provisioning, mainly driven by a covariance at the within‐nest level, showing a plastic behavioral coadjustment. [ABSTRACT FROM AUTHOR]

One of the most conspicuous livelihood strategies for physically disabled people in Kinshasa, Democratic Republic of Congo, is a particular style of begging known locally as "doing documents." Confronted with the stigma of begging, disabled beggars create documents in an attempt to legitimize and regulate begging through formalization and bureaucracy, presenting their relationship with donors as NGO fund‐raising and government tax‐collecting. The dynamics of petitioning for these "contractual dependencies" provide a nuanced perspective on desired dependencies: dependencies can be presented in multiple ways, and people consider some dependencies more legitimate and valuable than others. Recipients are not passive but play a defining role in shaping these relationships, seeking a balance between proximity and desired distance to patrons. [ABSTRACT FROM AUTHOR]

The cover page of the issue is presented, along with information related to subscription, editors and table of content.

In animal communication, signal loudness is often ignored and seldom measured. We used a playback experiment to examine the role of vocal loudness (i.e., sound pressure level) in sibling to sibling communication of nestling barn owls Tyto alba. In this species, siblings vocally negotiate among each other for priority access to parental food resources. Call rate and call duration play key roles in this vocal communication system, with the most vocal nestlings deterring their siblings from competing for access to the food item next delivered by parents. Here, we broadcast calls at different loudness levels and call rate to live nestlings. The loudness of playback calls did not affect owlets' investment in call rate, call duration or call loudness. The rate at which playback calls were broadcast affected owlets' call rate but did not influence their response in terms of loudness. This suggests that selection for producing loud signals may be weak in this species, as loud calls may attract predators. Moreover, given that owlets do not overlap their calls and that they communicate to nearby siblings in the silence of the night, loud signals may not be necessary to convey reliable information about food need. [ABSTRACT FROM AUTHOR]

Parasitized nestlings might be expected to increase begging effort to obtain additional resources to compensate for those sequestered by their parasites. However, begging is costly and chicks harbouring parasites may find it more difficult to attain high begging levels. Consequently, we predicted that, for the same level of nutritional need, nestlings that are parasitized will invest less in begging than those that are not parasitized. We tested this prediction by measuring begging in Pied Flycatcher Ficedula hypoleuca nestlings parasitized with haematophagous mites Dermanyssus gallinoides and Dermanyssus gallinae and blowfly larvae Protocalliphora azurea, and subjected to different levels of food deprivation in order to control for short-term nutritional need. Nestlings from nests with ectoparasites spent less time begging than those from nests without parasites, especially when very hungry, although there was no association with latency to beg or begging intensity. Our results suggest that time invested in begging may indicate not only the level of need, but also nestling parasitism status. [ABSTRACT FROM AUTHOR]

The number of offspring surviving until independence is the fundamental drive in the evolution of parental care. Because of the related costs, parental investment must be balanced with essential resources for parents themselves, among the resources available in the environment under the current parental condition. It is advantageous for parents to adjust their level of investment to the number of offspring; however, there is little evidence that parents employ numerical competence in adjusting their investment level. We investigated how parents respond to experimentally manipulated brood sizes in a passerine species, known as a host of a brood parasitic cuckoo whose chicks presumably deceive their hosts numerically. Parents reduced their provisioning to broods of reduced sizes, whereas parents did not increase provisioning to enlarged broods compared to that in the control condition. These parental responses can be attributed to the response of chicks to the experimental treatments compared to that in the control: chicks lowered begging intensity in the reduced condition, while they did not intensify being in the enlarged condition. Further analyses revealed that eagerness of parents to respond to chick begging intensity differed between the experimental treatments: strong parental response was detected toward begging chicks only in the reduced condition. We propose that the detected equivocality of parental responses might be related to the difference in the number of chicks between the unmanipulated and experimentally manipulated broods, the former reflecting the initial parental decision on the amount of resources to allocate to the brood. [ABSTRACT FROM AUTHOR]

One example of the impact of neoliberalism on urbanization is that of the Business Improvement District ( BID), where business and property owners collectively manage a district to ensure that it has an appropriate 'business climate'. The responses of BIDs to the language practices of the homeless, such as panhandling, tend to be ambivalent because homelessness is an issue that requires sensitivity. Nevertheless, overly aggressive panhandling can have adverse repercussions for businesses. This paper focuses on San Francisco's Union Square, which is the city's commercial retail center, and makes two key points. One, language policy needs to be viewed as planned, unplanned or transgressive, where these characterizations are necessarily from the perspective of an specific actor, such as the Union Square BID. Two, there are interesting attempts to transform panhandling practices from above, pushing these towards neoliberalism with the consequence that the panhandlers themselves sometimes respond by reimagining panhandling as work or a business. [ABSTRACT FROM AUTHOR]

Offspring begging can be triggered by a variety of acoustic, visual or chemical cues from the parents. In many birds, nestlings use information derived from these cues to discriminate between individual parents or different classes of adults. Although begging occurs in some insects, we know very little about discrimination between adults by insect larvae. Here, we examine whether begging larvae in the burying beetle Nicrophorus vespilloides can discriminate between individual parents or different classes of adults. We found that larvae showed no discrimination between male and female beetles, but that they begged more towards breeding beetles than towards non-breeding ones. These results were robust regardless of whether larvae had been reared in presence or absence of adult beetles, thus suggesting that larval discrimination is based on an innate template that requires no prior exposure to adult beetles. We also found that larvae begged more towards unfamiliar beetles than towards familiar ones, suggesting that they can learn to discriminate between individual parents based on cues about familiarity. We conclude that insect larvae may benefit from discriminating between different classes of adult beetles, as it allows them to lower the costs associated with begging in response to irrelevant environmental cues (costly in terms of wasted effort) and with not begging in response to the presence of caring parents (costly in terms of lost feeding opportunities). [ABSTRACT FROM AUTHOR]

Environmental factors such as heat and solar radiation directly affect the open-cup nest environment and can impact nestling body temperature., The aim of our research was to understand how open-cup passerine nestlings use behavioural thermoregulation to mitigate solar heat gain and to measure the metabolic cost of begging and non-begging activity under three light treatments: room light (<2 Wm−2), simulated shade (500 Wm−2) and simulated sun (1000 Wm−2). Our study coupled behavioural (field) and physiological (laboratory) experiments to explore the adaptive behavioural response of passerine nestlings to nest cup nanoclimates (sun and shade), using the common grackle ( Quiscalus quiscula) as a model species., Non-begging behaviour was evaluated in the field by randomly assigning nestlings to a homogeneous (all sun) or heterogeneous (sun and shade) nest environment; measuring body temperature ( Tb); and identifying behaviours from videotaped footage. The Tb of nestlings without access to shade was significantly higher, and nestlings spent more time moving and panting, suggesting an increased metabolic expenditure. To test this, we duplicated the insolation nanoclimate under laboratory conditions using a 1·0 KW Sciencetech Illumination System and measured the energetic cost of begging and non-begging activity using open-system respirometry on non-irradiated and irradiated nestlings. Our results suggest that, in grackle nestlings, the relationship between activity (begging and non-begging) and energy expenditure is context-dependent., Our results identified: (i) a reduction in energy expenditure associated with accessing the shade; (ii) expenditure on non-begging activity equalled or exceeded expenditure on begging activity; and (iii) a potential behavioural constraint on begging imposed by exposure to a homogeneous sun environment (sun without access to shade). The combination of context-dependent costs and constraints suggests the potential for strategic costs associated with the heterogeneous nest environment . [ABSTRACT FROM AUTHOR]

Parental care should be selected to respond to honest cues that increase offspring survival. When offspring are parasitised, the parental food compensation hypothesis predicts that parents can provision extra food to compensate for energy loss due to parasitism. Chick begging behaviour is a possible mechanism to solicit increased feeding from attending parents. We experimentally manipulated parasite intensity from Philornis downsi in nests of Darwin's small ground finch ( Geospiza fuliginosa) to test its effects on chick begging intensity and parental food provisioning. We used in-nest video recordings of individually marked chicks to quantify nocturnal parasite feeding on chicks, subsequent diurnal chick begging intensity and parental feeding care. Our video analysis showed that one chick per brood had the highest parasite intensity during the night (supporting the tasty chick hypothesis) and weakest begging intensity during the day, which correlated with low parental care and rapid death. We observed sequential chick death on different days rather than total brood loss on a given day. Our within-nest video images showed that (1) high nocturnal larval feeding correlated with low diurnal begging intensity and (2) parent birds ignored weakly begging chicks and provisioned strongly begging chicks. Excluding predation, all parasite-free chicks survived (100% survival) and all parasitised chicks died in the nest (100% mortality). Weak begging intensity in parasitised chicks, which honestly signalled recent parasite attack, was not used as a cue for parental provisioning. Parents consistently responded to the strongest chick in both parasitised and parasite-free nests. [ABSTRACT FROM AUTHOR]

The hormonal environment during early development, such as maternally derived androgens in bird eggs, has been shown to shape offspring in ways that may have important short- and long-term consequences for phenotype and behavior. However, studies on the effects of androgens on begging behavior and growth in birds have provided variable results and sex-specific effects are not well understood. We experimentally elevated yolk androgen levels in whole clutches in a passerine bird, the pied flycatcher Ficedula hypoleuca and studied effects on male and female begging behavior, ingestion and digestion. Yolk androgen elevation led to shorter latencies to beg in both male and female nestlings but to greater begging rates only in males. Both responses could be used as cues to solicit more food from parents. Yolk androgens had no effect on food intake, fecal wet mass or fecal water content. However, the proportion of organic matter in feces was lower in androgen-treated than control males, potentially suggesting that the androgen-treated individuals had more efficient digestion. We discuss the alternative pathways of effects of yolk androgens on begging, growth and digestion. If the effects of yolk androgens on phenotype and behavior are causally linked, there is less scope for the mother to adjust specific offspring traits independently from other traits. The sex-specific effects of yolk androgens should be studied more, also in within-clutch context, as the costs and benefits for each sex may further differ in relation to hatching order. [ABSTRACT FROM AUTHOR]

The conflict between siblings over how parental resources are divided has promoted the evolution of specific behaviour to outcompete each other. Young animals look out for parents' arrival in order to start begging as quickly as possible, since a rapid begging reaction increases the likelihood of being fed before nestmates. If the young can physically intercept the parents, selection might be operating on the offspring ability to monitor parent arrival (vigilance towards parents) and any sudden modifications in siblings' behaviour (vigilance towards siblings). To investigate the adaptive value of nestling vigilance in the context of family interactions, we recorded which direction barn owl Tyto alba siblings were facing in 89 two-chick broods before the first parental feeding visit of the night. Nestlings were more vigilant towards nest entrance than expected by chance suggesting that vigilance towards parents is an important component of sibling competition. When positioned near the nest-box entrance where parents predictably deliver food, the younger individual (i.e. junior) looked more towards the entrance than its older sibling. Thus, when the likelihood of obtaining a food item is relatively high, juniors are more vigilant than seniors to detect the incoming parent. When positioned at the back of the nest, the senior looked relatively more frequently towards its sibling than the junior did in the same situation. This suggests that when the likelihood of obtaining a food item is relatively low, seniors are more vigilant than juniors to observe their sibling. Because vigilance was not related to hunger level and prey obtaining, we propose the hypothesis that vigilance towards parents and siblings only indirectly influences the outcome of sibling competition. [ABSTRACT FROM AUTHOR]

Among various begging stimuli, mouth coloration has received increasing attention in recent years, and previous research has demonstrated that mouths of nestling Canaries Serinus canaria get redder with the extent of food deprivation and that parents preferentially feed nestlings of redder gapes. This study assesses whether the intensity of red mouth colour in nestling Blackcaps Sylvia atricapilla is a signal in parent-offspring communication. This is one of the few species with a naturally red gape in which the function of mouth redness has been tested. Three predictions were experimentally tested: (1) reddening the gape of a single nestling within a brood increases its provisioning in relation to other siblings; (2) reddening the gapes of all nestlings within a brood increases parental feeding rate; and (3) food deprivation increases nestling mouth redness. The effect of nestling quality on mouth redness was also assessed. The intensity of gape coloration affected food distribution, but in a way opposite to that expected: an increase in mouth redness of the nestling caused reduced feeding by parents. However, reddening the gapes of all nestlings had no effect on provisioning of the whole brood, suggesting that Blackcap parents use different cues for provisioning particular nestlings and the whole brood. Intensity of mouth redness in Blackcap nestlings was not affected either by food deprivation or by nestling quality in terms of mass and rank in the nest. [ABSTRACT FROM AUTHOR]

We argue that standard definitions of 'vagueness' prejudice the question of how best to deal with the phenomenon of vagueness. In particular, the usual understanding of 'vagueness' in terms of borderline cases, where the latter are thought of as truth-value gaps, begs the question against the subvaluational approach. According to this latter approach, borderline cases are inconsistent (i.e., glutty not gappy). We suggest that a definition of 'vagueness' should be general enough to accommodate any genuine contender in the debate over how to best deal with the sorites paradox. Moreover, a definition of 'vagueness' must be able to accommodate the variety of forms sorites arguments can take. These include numerical, total-ordered sorites arguments, discrete versions, continuous versions, as well as others without any obvious metric structure at all. After considering the shortcomings of various definitions of 'vagueness', we propose a very general non-question-begging definition. [ABSTRACT FROM AUTHOR]

Douglas Alexander, Secretary of State for International Development, argues that, if we are to tackle global poverty, then we must address the ‘failure of political will’ to tackle the underlying causes of global inequality. However, the solution lies not with government alone, but in a partnership of voluntary, state, faith and private institutions, and citizens. [ABSTRACT FROM AUTHOR]

Asymmetric sibling competition, which occurs when some siblings hatch as stronger competitors than others, is an important component of avian reproductive strategies. Here, we report two experiments on the burying beetle Nicrophorus vespilloides investigating how parents might influence the outcome of asymmetric sibling competition. In this species, as in altricial birds, different-aged offspring compete for resources provided by the parents. However, unlike altricial birds, offspring depend only partially on their parents for resources, and parents adjust the brood size directly through filial cannibalism. In the first experiment, we compared the growth and survivorship of different-aged offspring when parents could and could not influence asymmetric sibling competition. In the second experiment, we recorded behavioral interactions between different-aged offspring and parents. We found that senior offspring (early-hatched) grew faster than juniors (late-hatched) when parents were present and could influence the outcome of sibling competition, whereas seniors and juniors grew at similar rates when parents were removed. Thus, seniors benefited more than did juniors when the offspring could obtain resources by begging from the female parent. There was no difference in the survivorship of seniors and juniors. We also found that seniors and juniors spent a similar amount of time feeding from female parents, but juniors spent more time begging and were less effective at begging than seniors. Interestingly, juniors spent more time begging only as long as seniors also begged, suggesting that juniors adjusted their begging effort in response to direct competition against seniors for resources provided by parents. Our study provides novel insights into the ecological significance of asymmetric sibling competition by showing that asymmetric sibling competition took place when parents were present and offspring could obtain resources by begging. In contrast, we found no evidence of asymmetric sibling competition when parents were absent and offspring obtained resources solely by self-feeding. [ABSTRACT FROM AUTHOR]

This article investigates the ways in which New Zealand local authorities respond to homelessness. It finds that while some punitive bylaws targeting homeless people exist, they are not widespread, and in three case study cities are accompanied by efforts to support social service providers. This indicates that New Zealand local authorities are prepared to look at alternatives to address homelessness, as opposed solely to following trends towards the increasing persecution of homeless people. However, cities' attitudes are subject to political whim, and on occasion they articulate an exclusive vision of public space linked to concerns for public safety and city image. Such thinking has led, for example, to homeless people being served with trespass notices by local authorities asserting “ownership” of public space. Nevertheless, the actions of New Zealand cities depart significantly from the dominant approaches seen elsewhere. This may be explained in part by the relative invisibility of homelessness in New Zealand, and by a popular distinction between “good” and “bad” homeless individuals. The net result is a generally positive approach to reducing homelessness by providing appropriate housing and support to those on the streets, complicating any direct application of the critical geographical literature on this issue to the New Zealand context. [ABSTRACT FROM AUTHOR]

We investigated the development of food transfer and independent feeding in cotton-top tamarin (Saguinus oedipus) families. We studied the relationship between infant-directed vocalizations and food transfers on the development of independent feeding in infants. We experimentally tested ten infants (eight twins and two singletons) three times a week for 17 weeks from before weaning through 20 weeks. Food transfers and vocalizations made during tests were recorded and analyzed to determine (1) the role of vocalizations (C- and D- chirps and D-chirp series) in food acquisition, (2) the relationship between food transfers and individual food acquisition, and (3) whether, owing to energetic costs of nursing and carrying twins, food is transferred to twins sooner than to singletons. Infants were more successful in acquiring food via begging when adults produced repeated vocalizations than when adults did not vocalize. Adults emitted more food-related vocalizations in rapid series when in the presence of infants, whereas during feeding in the absence of infants only single unit vocalizations were produced. Begging occurred frequently. Changes over infant age were not significant when all infants were included in analysis. However, when twin data were analyzed alone, begging success changed significantly over months, with successful begging peaking in month 3 (week 12). Begging success rate did not differ between twins and singletons, although twins fed independently sooner and at a higher rate than did singletons. Am. J. Primatol. 69:955–965, 2007. © 2007 Wiley-Liss, Inc. [ABSTRACT FROM AUTHOR]

When offspring compete for the attentions of provisioning parents, empirical and theoretical work has generally concluded that chicks honestly signal their “need” for resources and that parents control allocation. Here, we develop models to show that when allocation of food resources is determined by competitive begging scrambles between sibs, the offspring’s ESS begging levels, shares of food and personal fitness gained will be determined by an interaction between their competitive abilities and their true needs. Many of the predictions of this scramble competition model are qualitatively very similar to models of honest signalling of need, where parents, not offspring, control the allocation of food. Consequently it will be difficult to distinguish between the two mechanisms of food allocation based on empirical observations of the responses of chicks to feeding by parents. [ABSTRACT FROM AUTHOR]

Considers the role of principles in moral decision-making using the example of giving to beggars. Right time of giving aid to beggars; Discussion of whether to give help to beggars.

In contemporary Western societies, public begging is associated with economic failure and social opprobrium--the lot of street people. So Christians may be puzzled by the fact that an interpretation of the imitation of Christ in the late Middle Ages elevated religious mendicancy into an ideal form of life. Although voluntary religious begging cannot easily be resurrected as a Christian ideal today, the author argues that a radical attitude and practice of trust, self-abandonment, and acknowledgment of dependence on God can be a Christian ideal in any time and place. To follow this way of life, which the author calls mendicancy in attitude, is to become a beggar of God. [ABSTRACT FROM AUTHOR]

Infant marmosets and tamarins (Callitrichidae) frequently receive food from older group members. Three possible functions of food sharing in lion tamarins were examined experimentally. The first hypothesis, that food sharing ensures that infants receive sufficient food even if it is difficult for them to acquire it themselves, was tested by varying the ease with which infants could reach a food source. When access to food was restricted, infants fed themselves less, received more food from others, and had a higher success rate in begging attempts. The second hypothesis, that food sharing helps teach infants an appropriate diet, was tested by presenting fruits that were novel to infants. Although infants fed themselves less under these conditions, adults were Less likely to share novel foods than familiar foods. The final experiment compared food sharing when food was abundant with behavior when food items were presented singly. Infants fed themselves less and received more food from others when food items were rare. These results suggest that food sharing in lion tamarinds helps to ensure that infants receive adequate amounts of food which is difficult to locate or acquire, but that it is not involved in teaching infants which foods they should eat. [ABSTRACT FROM AUTHOR]

Chimpanzees' (Pan troglodytes) nut‐cracking behavior represents one of the most complex forms of tool‐use known among nonhuman animals. Given the close phylogenetic relationship between these apes and humans, investigating how such complex behavior develops in immatures can reveal the evolutionary roots of the cognitive processes that enabled the evolution of outstanding technological skills in our lineage. In this study, we investigated whether maternal behavior directly enhanced nut‐cracking skills in immature individuals. We analyzed the behavior of 11 immatures and their mothers (N = 8) during nut‐cracking activity, spanning over three consecutive nut‐cracking seasons in the Taï National Park, Côte d'Ivoire. We used generalized linear mixed models to (a) obtain values of maternal scaffolding (defined as provision of learning opportunities) and active nut‐sharing behavior of each mother according to the age of their offspring, and their average nut‐cracking efficiency; (b) to test whether these variables enhanced immatures' nut‐cracking skills; and (c) to test whether immatures' features (age, sex, and begging behavior) influenced maternal behavior as observed in our videos. Although the predicted values of maternal scaffolding and active nut‐sharing did not obviously affect immatures' skills, they were positively influenced by the average maternal efficiency and by sharing hammers with their mothers. In addition, our observations showed that mothers were more likely to share nuts with their sons than with their daughters, and the more their offspring begged. Concurrently, male immatures were also found to beg more often than females. Our results add evidence on the ontogenetic pathway leading to the full acquisition of nut‐cracking in wild chimpanzees and on the effect that maternal behavior can have in promoting the acquisition of this complex tool‐use behavior. Moreover, our study strengthens the importance of naturalistic observations to understand complex skill acquisition. Finally, we suggest future avenues for investigating the maternal influence on learning. HIGHLIGHTS: Sharing hammers between mothers and immatures significantly increased immatures' nut‐cracking efficiency and, seemingly, efficacy.Immatures' nut‐cracking efficiency positively correlated with the average efficiency of their respective mothers.Provision of practicing opportunities by mothers was not affected by immatures' features. However, mothers were more likely to share cracked nuts with sons than with daughters, and the longer offspring begged. Also, sons begged more than daughters. [ABSTRACT FROM AUTHOR]

The article offers information on the Malawi's government edict to arrest street beggars and parents of children begging on street which has sparked debate; and majority of people in the country take begging as a profession.

This section offers news briefs on the Gambia as of December 2013. The Gambia decided to break off diplomatic relations with Taiwan after 18 years as strategic national interest. Guinea Bissau had dismantled a criminal network trafficking children to Gambia where they are forced to beg on the streets.