9 results on '"Gloria M. Luque"'
Search Results
2. Influence of the Number of Queens on Nest Establishment: Native and Invasive Ant Species
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Gloria M. Luque, Franck Courchamp, Irene Castañeda, Elsa Bonnaud, Université Paris-Saclay, Ecologie Systématique et Evolution (ESE), AgroParisTech-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Biodiversité, Gènes & Communautés (BioGeCo), and Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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0106 biological sciences ,Linepithema humile ,education ,Zoology ,Biology ,010603 evolutionary biology ,01 natural sciences ,Article ,Tapinoma nigerrimum ,Nest ,establishment ,lcsh:Zoology ,queens ,lcsh:QL1-991 ,ant ,reproductive and urinary physiology ,lcsh:Veterinary medicine ,General Veterinary ,Ant colony ,biology.organism_classification ,ANT ,010602 entomology ,[SDE]Environmental Sciences ,workers ,behavior and behavior mechanisms ,Queen (butterfly) ,lcsh:SF600-1100 ,Animal Science and Zoology ,native ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,invasive - Abstract
As a critical stage in the life cycle of ant colonies, nest establishment depends on external and internal factors. This study investigates the effect of the number of queens on queen and worker behavior during nest establishment in invasive Argentine ants (Linepitema humile) and native Mediterranean Tapinoma nigerrimum. We set up experimental colonies with the same number of workers but with one or six queens. At different time points, we recorded the positions of queens and workers inside and outside the nest. Our results highlight the influence of the number of queens on the position of queens and workers with between-species differences. Queens of both species entered the nests more quickly when there were six queens. During nest establishment, more workers were inside nests with six queens for both species, with this effect being greater for T. nigerrimum. Once nests were established, fewer workers of both species were engaged in nest maintenance and feeding in nests with six queens, T. nigerrimum had fewer workers engaged in patrolling. These results suggest that the number of queens is a key factor driving queen and worker behavior during and after nest establishment with different species responses.
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- 2021
- Full Text
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3. Estimating illegal fishing from enforcement officers
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Gloria M. Luque, Stefan Gelcich, C. Josh Donlan, and Chris Wilcox
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Marine biology ,0106 biological sciences ,Government ,Multidisciplinary ,Resource (biology) ,Conservation biology ,Process (engineering) ,Science ,010604 marine biology & hydrobiology ,Fishing ,010603 evolutionary biology ,01 natural sciences ,Article ,Environmental impact ,Sustainability ,Medicine ,Environmental impact assessment ,Business ,Baseline (configuration management) ,Enforcement ,Author Correction ,Environmental planning - Abstract
While illegal, unreported, and unregulated (IUU) fishing is a premier issue facing ocean sustainability, characterizing it is challenging due to its clandestine nature. Current approaches can be resource intensive and sometimes controversial. Using Chile as an example, we present a structured process leveraging existing capacity, fisheries officers, that provides a monitoring tool to produce transparent and stand-alone estimates on the level, structure, and characteristics of illegal fishing. We provide a national illegal fishing baseline for Chile, estimating illegal activity for 20 fisheries, representing ~ 70% of annual national landings. For four fisheries, we also estimate the relative importance of illegal activities across sectors, stakeholders, and infrastructure. While providing new information, our results also confirm previous evidence on the general patterns of illegality. Our approach provides an opportunity for government agencies to formalize their institutional knowledge, while accounting for potential biases and reducing fragmentation of knowledge that can prevent effective enforcement. Estimating illegal activity directly from fisheries enforcement officers is complementary to existing approaches, providing a cost-effective, rapid, and rigorous method to measure, monitor, and inform solutions to reduce IUU fishing.
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- 2020
4. Improving invasive ant eradication as a conservation tool: A review
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Benjamin D. Hoffmann, Gloria M. Luque, C. Josh Donlan, Céline Bellard, and Nick D. Holmes
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0106 biological sciences ,biology ,Ecology ,macromolecular substances ,Pheidole megacephala ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Invasive species ,010602 entomology ,Biodiversity conservation ,Yellow crazy ant ,Northern australia ,Argentine ant ,Chemical control ,Environmental planning ,Ecology, Evolution, Behavior and Systematics ,Nature and Landscape Conservation ,Solenopsis geminata - Abstract
While invasive species eradications are at the forefront of biodiversity conservation, ant eradication failures are common. We reviewed ant eradications worldwide to assess the practice and identify knowledge gaps and challenges. We documented 316 eradication campaigns targeting 11 species, with most occurring in Australia covering small areas (
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- 2016
5. Review: Allee effects in social species
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Stephen D. Gregory, Gloria M. Luque, Elena Angulo, John W. Wenzel, Ludek Berec, Carmen Bessa-Gomes, and Franck Courchamp
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0106 biological sciences ,0301 basic medicine ,Insecta ,Applied ecology ,Population ,Metapopulation ,Biology ,Models, Biological ,010603 evolutionary biology ,01 natural sciences ,Population density ,Social group ,03 medical and health sciences ,symbols.namesake ,Per capita ,Animals ,Social Behavior ,education ,Ecology, Evolution, Behavior and Systematics ,Allee effect ,Mammals ,Population Density ,education.field_of_study ,Ecology ,Biological Evolution ,Eusociality ,030104 developmental biology ,symbols ,Animal Science and Zoology ,Genetic Fitness - Abstract
Allee effects have important implications for many aspects of basic and applied ecology. The benefits of aggregation of conspecific individuals are central to Allee effects, which have led to the widely held assumption that social species are more prone to Allee effects. Robust evidence for this assumption, however, remains rare. Furthermore, previous research on Allee effects has failed to adequately address the consequences of the different levels of organisation within social species' populations. Here, we review available evidence of Allee effects and model the role of demographic and behavioural factors that may combine to dampen or strengthen Allee effects in social species. We use examples across various species with contrasting social structure, including carnivores, bats, primates and eusocial insects. Building on this, we provide a conceptual framework that allows for the integration of different Allee effects in social species. Social species are characterised by nested levels of organisation. The benefits of cooperation, measured by mean individual fitness, can be observed at both the population and group levels, giving rise to "population level" and "group level" Allee effects respectively. We also speculate on the possibility of a third level, reporting per capita benefits for different individuals within a group (e.g. castes in social insects). We show that group size heterogeneity and intergroup interactions affect the strength of population-level demographic Allee effects. Populations with higher group size heterogeneity and in which individual social groups cooperate demonstrate the weakest Allee effects and may thus provide an explanation for why extinctions due to Allee effects are rare in social species. More adequately accounting for Allee effects in social species will improve our understanding of the ecological and evolutionary implications of cooperation in social species.
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- 2018
6. The impact of climate change changes over time
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Gloria M. Luque, Cleo Bertelsmeier, and Franck Courchamp
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0106 biological sciences ,Current distribution ,business.industry ,Ecology ,010604 marine biology & hydrobiology ,Species distribution ,Distribution (economics) ,Climate change ,Global change ,Time horizon ,15. Life on land ,010603 evolutionary biology ,01 natural sciences ,Habitat ,13. Climate action ,Environmental science ,Physical geography ,Scale (map) ,business ,Ecology, Evolution, Behavior and Systematics ,Nature and Landscape Conservation - Abstract
Species distribution models (SDMs) have become an important tool to predict the impact of climate change on the distribution of a given species. Generally, projections for a chosen time horizon in the future are compared with the size of the species’ current distribution. In this study, we show that selection of the target time horizon can qualitatively alter the prediction of a species’ future distribution. We illustrate this by assessing the potential distribution of 15 invasive ant species in 2020, 2050 and 2080 at a global scale. Our results indicate that for 6 out of the 15 species modelled, the trend of potential habitat size (i.e., decrease or increase) changed over time following climate change. In four species, the sign of the trend changed, from an initial expansion to a subsequent reduction or vice versa, depending on the date projected to. In some cases, these changes were great (e.g., from an initial increase of 36.5% in 2050 to a decrease of −64.3% in 2080). Our findings stress the importance of using several projection horizons to avoid misled species management decisions.
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- 2013
7. The 100th of the world’s worst invasive alien species
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Gloria M. Luque, Cleo Bertelsmeier, Céline Bellard, Franck Courchamp, Piero Genovesi, Daniel Simberloff, Elsa Bonnaud, Centre National de la Recherche Scientifique (CNRS), Ecologie Systématique et Evolution (ESE), AgroParisTech-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11), International Union for Conservation of Nature (IUCN), and The University of Tennessee [Knoxville]
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0106 biological sciences ,Ecology ,biology ,010604 marine biology & hydrobiology ,Biodiversity ,Introduced species ,15. Life on land ,Salvinia ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Invasive species ,13. Climate action ,[SDE]Environmental Sciences ,IUCN Red List ,14. Life underwater ,Alien species ,Environmental planning ,Ecology, Evolution, Behavior and Systematics ,Global biodiversity ,Salvinia molesta - Abstract
International audience; Biological invasions are among the greatest threats to global biodiversity, but in contrast to most other global threats, they suffer from specific communication issues. Our paper presents the first new addition to the widely cited IUCN list of ''100 of the world's worst invasive species'', a list created a decade ago in response to these communication issues. We briefly present this list, the recent removal of one species from that list, and the rationale to include a novel, 100th species to replace it. The new species of this list, giant salvinia (Salvinia molesta), was chosen by the community of invasion biologists (over 650 experts from over 60 countries). This new addition to the list will draw public attention to the damage caused by invasive alien species and it will help stimulate the necessary discussion of this critical issue in science and policy circles.
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- 2013
8. The genetic Allee effect: A unified framework for the genetics and demography of small populations
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Gloria M. Luque, Franck Courchamp, Xavier Fauvergue, Chloé Vayssade, Thomas Guillemaud, Benoit Facon, Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS), Ecologie Systématique et Evolution (ESE), Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), AgroParisTech, Institut Sophia Agrobiotech [Sophia Antipolis] (ISA), Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Department of Ecology and Evolutionary Biology, Center for Tropical Research, Institute of the Environment and Sustainability, University of California [Los Angeles] (UCLA), University of California-University of California, (RARE project) ANR-2009-PEXT-01001 / (VORTEX project)APP-IN-2009-052 / (Sextinction project) ANR-2010-BLAN-1717, Institut Sophia Agrobiotech (ISA), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Recherche Agronomique (INRA), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), This work was supported by the Agence Nationale de la Recherche (Sextinction project ANR-10-BLAN-1717 and RARE project ANR-09-PEXT-0010) and the Fondation de Recherche sur la Biodiversite (VORTEX project APP-IN-2009-052)., ANR-10-BLAN-1717,SEXTINCTION,Extinctions chez les Hyménoptères : gènes, comportements, et dynamique des populations goulotées(2010), ANR-09-PEXT-0010,RARE,Recherches sur l'effet Allee et l'effet rareté(2009), Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), and University of California (UC)-University of California (UC)
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0106 biological sciences ,0301 basic medicine ,small populations ,Ecology (disciplines) ,Population ,Biology ,010603 evolutionary biology ,01 natural sciences ,Population density ,extinction vortex ,Allee effect ,03 medical and health sciences ,symbols.namesake ,lcsh:QH540-549.5 ,Inbreeding depression ,education ,Ecology, Evolution, Behavior and Systematics ,030304 developmental biology ,Extinction vortex ,2. Zero hunger ,0303 health sciences ,education.field_of_study ,Extinction ,drift load ,Ecology ,Population size ,Small population size ,eco-evolutionary feedback ,030104 developmental biology ,Genetic structure ,symbols ,lcsh:Ecology ,eco‐evolutionary feedback ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,migration load ,Demography ,inbreeding depression - Abstract
Agence Nationale de la Recherche (Sextinction project) ANR-2010-BLAN-1717 (RARE project) ANR-2009-PEXT-01001 Fondation de Recherche sur la Biodiversite (VORTEX project) APP-IN-2009-052; The Allee effect is a theoretical model predicting low growth rates and the possible extinction of small populations. Historically, studies of the Allee effect have focused on demography. As a result, underlying processes other than the direct effect of population density on fitness components are not generally taken into account. There has been heated debate about the potential of genetic processes to drive small populations to extinction, but recent studies have shown that such processes clearly impact small populations over short time scales, and some may generate Allee effects. However, as opposed to the ecological Allee effect, which is underpinned by cooperative interactions between individuals, genetically driven Allee effects require a change in genetic structure to link the decline in population size with a decrease in fitness components. We therefore define the genetic Allee effect as a two-step process whereby a decrease in population size leads to a change in population genetic structure and, in turn, to a decrease in individual fitness. We describe potential underlying mechanisms and review the evidence for this original type of component Allee effect, using published examples from both plants and animals. The possibility of considering demogenetic feedback in light of genetic Allee effects clarifies the analysis and interpretation of demographic and genetic processes, and the interplay between them, in small populations.
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- 2016
- Full Text
- View/download PDF
9. Allee effects in ants
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Franck Courchamp, Gloria M. Luque, Tatiana Giraud, Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS), Ecologie Systématique et Evolution (ESE), Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), and Université Paris Saclay (COmUE)
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0106 biological sciences ,Population ,Population Dynamics ,Biology ,010603 evolutionary biology ,01 natural sciences ,Intraspecific competition ,symbols.namesake ,Argentine ant ,Animals ,Cooperative Behavior ,Mortality ,education ,Social Behavior ,Ecology, Evolution, Behavior and Systematics ,ComputingMilieux_MISCELLANEOUS ,Allee effect ,education.field_of_study ,Community ,Behavior, Animal ,Ecology ,Ants ,Reproduction ,[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] ,15. Life on land ,biology.organism_classification ,Eusociality ,Brood ,010602 entomology ,symbols ,Animal Science and Zoology ,Linepithema ,Female ,Introduced Species - Abstract
Summary 1. Allee effects occur when the aggregation of individuals result in mutually beneficial intraspecific interactions whereby individual fitness, or per capita growth rate, increases with the number of individuals. Allee effects are common in social species due to their cooperative behaviours, such as breeding, feeding or defence. Allee effects have important implications for many aspects of basic and applied ecology. Over the past decades, the study of Allee effects has influenced population dynamics, community ecology, endangered species management and invasion biology. 2. Despite the fact that cooperation is the basis of their social structure, Allee effects have received little attention among eusocial insects. Extreme cooperation is common, and reproductive specialization of individuals occurs due to division of labour. These life-history traits suggest that the potential contribution of each caste to reproduction and survival may be differential and nonadditive. 3. We studied Allee effects in the invasive Argentine ant (Linepithema humile). In this species, many queens and workers are present in colonies, which allowed us to explore the differential effects of castes on the presence of Allee effects. In the laboratory, we measured brood production and individual survival in experimental colonies that differed in the initial numbers of queens and workers. 4. Our results highlight the differential effect of queens and workers on survival and productivity. We found three positive density-dependent relationships indicative of component Allee effects at the colony level: both workers and queens had a positive effect on the productivity of the other caste, and queens had a positive effect on worker survivorship. 5. Our experimental results suggest a potential positive feedback between worker and queen abundance, which may have contributed to the evolution of large colony sizes. Our study provides the first evidence of Allee effects in eusocial insects and highlights the need to consider castes separately in population dynamics. Division of labour and differential reproductive rates are factors that should be integrated into the study of Allee effects.
- Published
- 2013
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