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Title |
Areas of importance for seabirds tracked from French southern territories, and recommendations for conservation
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Journal Article |
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Year |
2014 |
Publication |
Marine Policy |
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Volume |
48 |
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1-13 |
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Keywords |
High Sea, Key areas, Marine Important Bird Area, Seabirds, Southern Ocean, Tracking, |
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109;394 |
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Bachelor's thesis |
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0308-597X |
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yes |
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5013 |
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The biogeographic atlas of the Southern Ocean |
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Conference - International - Poster |
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2014 |
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SCAR Open Science conference |
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1142 |
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yes |
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5011 |
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Swadling K.M. |
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Book Chapter |
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2014 |
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1142 |
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5010 |
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Danis B., De Broyer C., P. Koubbi P., Van de Putte A.P. |
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Book Chapter |
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2014 |
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1142 |
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yes |
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5009 |
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Author |
Cuzin-Roudy J., Irisson J.-O., Penot F., Kawaguchi S., Vallet C. |
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Book Chapter |
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Year |
2014 |
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1142 |
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yes |
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5008 |
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Author |
Santin-Janin Hugues, Hugueny Bernard, Aubry Philippe, Fouchet David, Gimenez Olivier, Pontier Dominique, |
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Title |
Accounting for Sampling Error When Inferring Population Synchrony from Time-Series Data: A Bayesian State-Space Modelling Approach with Applications
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Journal Article |
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Year |
2014 |
Publication |
PLoS ONE |
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Volume |
9 |
Issue |
1 |
Pages |
e87084- |
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Abstract |
Background Data collected to inform time variations in natural population size are tainted by sampling error. Ignoring sampling error in population dynamics models induces bias in parameter estimators, e.g., density-dependence. In particular, when sampling errors are independent among populations, the classical estimator of the synchrony strength (zero-lag correlation) is biased downward. However, this bias is rarely taken into account in synchrony studies although it may lead to overemphasizing the role of intrinsic factors (e.g., dispersal) with respect to extrinsic factors (the Moran effect) in generating population synchrony as well as to underestimating the extinction risk of a metapopulation. Methodology/Principal findingsThe aim of this paper was first to illustrate the extent of the bias that can be encountered in empirical studies when sampling error is neglected. Second, we presented a space-state modelling approach that explicitly accounts for sampling error when quantifying population synchrony. Third, we exemplify our approach with datasets for which sampling variance (i) has been previously estimated, and (ii) has to be jointly estimated with population synchrony. Finally, we compared our results to those of a standard approach neglecting sampling variance. We showed that ignoring sampling variance can mask a synchrony pattern whatever its true value and that the common practice of averaging few replicates of population size estimates poorly performed at decreasing the bias of the classical estimator of the synchrony strength. Conclusion/SignificanceThe state-space model used in this study provides a flexible way of accurately quantifying the strength of synchrony patterns from most population size data encountered in field studies, including over-dispersed count data. We provided a user-friendly R-program and a tutorial example to encourage further studies aiming at quantifying the strength of population synchrony to account for uncertainty in population size estimates.
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Programme |
279 |
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Publisher |
Public Library of Science |
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ISSN |
1932-6203 |
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Approved |
yes |
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Serial |
5004 |
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Author |
Nesterova Anna P, Flack Andrea, van Loon E Emiel, Marescot Yoanna, Bonadonna Francesco, Biro Dora, |
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Title |
Resolution of navigational conflict in king penguin chicks
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Type |
Journal Article |
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Year |
2014 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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Volume |
93 |
Issue |
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Pages |
221-228 |
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Keywords |
Aptenodytes patagonicus, conflict resolution, decision making, group behaviour, group navigation, king penguin, |
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Abstract |
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Programme |
354 |
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ISSN |
0003-3472 |
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Approved |
yes |
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Serial |
4998 |
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Author |
Caro Samuel P, Balthazart Jacques, Bonadonna Francesco, |
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Title |
The perfume of reproduction in birds: Chemosignaling in avian social life
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Type |
Journal Article |
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Year |
2015 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
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Volume |
68 |
Issue |
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Pages |
25-42 |
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Keywords |
Olfaction, Pheromone, Avian, Sexual selection recognition, |
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Abstract |
Chemical cues were probably the first cues ever used to communicate and are still ubiquitous among living organisms. Birds have long been considered an exception: it was believed that birds were anosmic and relied on their acute visual and acoustic capabilities. Birds are however excellent smellers and use odors in various contexts including food searching, orientation, and also breeding. Successful reproduction in most vertebrates involves the exchange of complex social signals between partners. The first evidence for a role of olfaction in reproductive contexts in birds only dates back to the seventies, when ducks were shown to require a functional sense of smell to express normal sexual behaviors. Nowadays, even if the interest for olfaction in birds has largely increased, the role that bodily odors play in reproduction still remains largely understudied. The few available studies suggest that olfaction is involved in many reproductive stages. Odors have been shown to influence the choice and synchronization of partners, the choice of nest-buildingmaterial or the care for the eggs and offspring. How this chemical information is translated at the physiological level mostly remains to be described, although available evidence suggests that, as in mammals, key reproductive brain areas like the medial preoptic nucleus are activated by relevant olfactory signals. Olfaction in birds receives increasing attention and novel findings are continuously published, but many exciting discoveries are still ahead of us, and could make birds one of the animal classes with the largest panel of developed senses ever described. |
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354 |
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ISSN |
0018-506X |
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yes |
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Call Number |
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Serial |
4997 |
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Type |
Journal Article |
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Year |
2014 |
Publication |
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
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Volume |
68 |
Issue |
5 |
Pages |
721-732- |
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Keywords |
Time budget, Behavior, Glucocorticoid, Pygoscelis adeliae, Reproduction, Reproductive performances, |
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Abstract |
Glucocorticoid hormones (GCs) are important mediators of physiological and behavioral responses to stress. While many studies have evaluated the environmental, behavioral, or physiological correlates of GCs and their effects on reproductive performances, further work is needed to clarify the relationship between GCs and fitness. Assessing the effects of increased GC levels on specific behaviors of breeding animals should improve our understanding of how GCs affect parental care. In this experimental study, we measured the effects of an experimental increase in corticosterone (CORT, the main avian GC) levels on the behavior of free-living male Ad,lie penguins (Pygoscelis adeliae) within the colony, their reproductive output, and the indirect consequences of both on the behavior of their partners. We show that increased CORT levels in males decreased their foraging time at sea while increased their attendance at the nest, although their attentiveness toward the nest itself decreased. In addition, treated males spent more time on comfort behaviors (e.g., preening), vocalizing, and engaging in positive social interactions relative to controls. Treatment further affected the behavior of their partners, but not chick begging and feeding rates. Penguins with increased CORT levels also exhibited decreased reproductive output. Previous studies of Ad,lie penguins in different life history stages and environmental conditions suggest that the consequences of CORT treatment on reproductive performance are context-dependent. In addition to the potential delay in the effects of increased CORT levels on reproduction, this context dependence should be taken into account when studying the behavior of free-living animals in relation to stress-inducing situations.
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1091 |
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Springer Berlin Heidelberg |
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0340-5443 |
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yes |
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4996 |
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Title |
Important marine habitat off east Antarctica revealed by two decades of multi-species predator tracking
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Type |
Journal Article |
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Year |
2015 |
Publication |
Ecography |
Abbreviated Journal |
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Volume |
38 |
Issue |
2 |
Pages |
121-129 |
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Programme |
1091 |
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Blackwell Publishing Ltd |
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1600-0587 |
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yes |
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4995 |
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