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Author |
Petra Quillfeldt, Henri Weimerskirch, Karine Delord, Yves Cherel |
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Title |
Niche switching and leapfrog foraging: movement ecology of sympatric petrels during the early breeding season |
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Journal |
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Year |
2020 |
Publication |
Movement Ecology |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
Pages |
23 |
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Keywords  |
Breeding schedule Central-place forager Foraging ecology Tracking |
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Abstract |
The timing of events in the early part of the breeding season is crucially important for successful reproduction. Long-lived animals that migrate large distances independently of each other meet at the breeding sites to re-establish their pair bonds and coordinate their breeding duties with their partners. |
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109 |
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ISSN |
2051-3933 |
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yes |
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8080 |
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Author |
Pardo Deborah, Barbraud Christophe, Weimerskirch Henri, |
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Title |
Females better face senescence in the wandering albatross
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Type |
Journal Article |
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Year |
2013 |
Publication |
OECOLOGIA |
Abbreviated Journal |
Oecologia |
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Volume |
173 |
Issue |
4 |
Pages |
1283-1294 |
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Keywords |
Breeding probability, Breeding success, Diomedea exulans, Ecology, Plant Sciences, Seabird, Senescence, Sexual dimorphism, Survival, |
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Abstract |
Sex differences in lifespan and aging are widespread among animals. Since investment in current reproduction can have consequences on other life-history traits, the sex with the highest cost of breeding is expected to suffer from an earlier and/or stronger senescence. This has been demonstrated in polygynous species that are highly dimorphic. However in monogamous species where parental investment is similar between sexes, sex-specific differences in aging patterns of life-history traits are expected to be attenuated. Here, we examined sex and age influences on demographic traits in a very long-lived and sexually dimorphic monogamous species, the wandering albatross (Diomedea exulans). We modelled within the same model framework sex-dependent variations in aging for an array of five life-history traits: adult survival, probability of returning to the breeding colony, probability of breeding and two measures of breeding success (hatching and fledging). We show that life-history traits presented contrasted aging patterns according to sex whereas traits were all similar at young ages. Both sexes exhibited actuarial and reproductive senescence, but, as the decrease in breeding success remained similar for males and females, the survival and breeding probabilities of males were significantly more affected than females. We discuss our results in the light of the costs associated to reproduction, age-related pairing and a biased operational sex-ratio in the population leading to a pool of non-breeders of potentially lower quality and therefore more subject to death or breeding abstention. For a monogamous species with similar parental roles, the patterns observed were surprising and when placed in a gradient of observed age/sex-related variations in life-history traits, wandering albatrosses were intermediate between highly dimorphic polygynous and most monogamous species. |
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109 |
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Bachelor's thesis |
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0029-8549 |
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yes |
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Serial |
4411 |
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Author |
C. Barbraud, J. Vasseur, K. Delord |
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Journal |
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Year |
2018 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
41 |
Issue |
2 |
Pages |
313-322 |
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109 |
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ISSN |
1432-2056 |
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1432-2056 |
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yes |
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7111 |
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Title |
Breeding failure induces large scale prospecting movements in the black-legged kittiwake
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Journal Article |
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Year |
2015 |
Publication |
Journal of Experimental Marine Biology and Ecology |
Abbreviated Journal |
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Volume |
473 |
Issue |
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Pages |
138-145 |
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Keywords |
Breeding habitat selection, Conspecific reproductive success, Dispersal decisions, Rissa tridactyla, Site fidelity, Social information use, |
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Abstract |
Before making dispersal decisions, many species are known to gather social information by prospecting potential future breeding sites, especially when they have failed breeding. So far, the role of current breeding performance on the occurrence of prospecting movements has mainly been studied at limited spatial scales, because of difficulties in tracking free-ranging, fast-moving individuals between distant breeding patches. Little information is thus available on individual behaviour and the spatial extent of prospecting movements in response to breeding failure. To address this issue, black-legged kittiwakes which breeding success was manipulated were tracked with GPS at the end of incubation in two Norwegian colonies. Crucially, and as predicted, prospecting visits to other breeding colonies were recorded in 33% of artificially-failed breeders, but never in successful ones. They occurred at large (40km) as well as local spatial scales (1km). Time-budgets of successful and failed breeders differed significantly in terms of trip duration, but also foraging, resting and nesting propensities. These results provide important elements to assess trade-offs between prospecting and other activities. They show that a substantial proportion of failed breeders prospect as early as within a week after failure at the egg stage and suggest that these individuals assess their options of future reproduction by prospecting alternative areas, although dispersal decisions may also involve more complex behavioural processes. Because they link breeding colonies situated tens of kilometres apart, prospecting movements may have critical implications for the dynamics of subdivided populations.
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333 |
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ISSN |
0022-0981 |
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Approved |
yes |
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Call Number |
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Serial |
6093 |
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Author |
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Title |
Predicting population responses to environmental change: the importance of considering informed dispersal strategies in spatially structured population models
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Type |
Journal Article |
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Year |
2015 |
Publication |
Diversity and Distributions |
Abbreviated Journal |
Divers. Distrib. |
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Volume |
21 |
Issue |
1 |
Pages |
88-100 |
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Keywords |
Breeding habitat selection, climate change, conspecific breeding success, extinction probabilities, prospecting behaviour, social information use, |
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Abstract |
Abstract: Aim Because of its complexity, dispersal has often been simplified when implemented in models aiming at understanding and predicting population dynamics and persistence in a context of environmental change. In particular, informed dispersal, i.e. the use of personal and social information to decide whether to leave a natal or current breeding site and where to settle, has seldom been considered. Informed dispersal could nevertheless be critical for predicting population dynamics, structure and persistence, as it could help populations track environmental change. Here, we develop a simulation model to examine the consequences of four dispersal strategies (informed, semi-informed, fixed random dispersal and philopatry) on the dynamics, structure and persistence of a spatially structured population under different environmental scenarios.
Methods We built and parameterized a metapopulation dynamic model using a long-lived colonial seabird species as an example, the black-legged kittiwake Rissa tridactyla, breeding on a set of distinct patches. Various scenarios of environmental variability and multiple factors potentially driving natal and breeding dispersal decisions (local habitat quality, individual breeding success, personal and social information use) were considered in order to explore their respective effects.
Results Environmental change and dispersal strategies strongly influenced metapopulation dynamics and structure. In spatially variable environments, informed and semi-informed dispersal maintained populations in the long-term, whereas philopatry and random dispersal led to extinction. Contrasted dynamics also arose: philopatry led to ecological traps, random and semi-informed dispersal led to source-sink dynamics, and informed dispersal drove extinction-recolonization dynamics.
Main conclusions This study demonstrates the importance of including informed dispersal in models aiming at predicting the dynamics of spatially structured populations. It also serves to highlight the urgent need to collect more empirical data on dispersal processes in order to properly parameterize such models.
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333 |
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ISSN |
1472-4642 |
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Approved |
yes |
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Call Number |
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Serial |
5285 |
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Author |
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Title |
Intense prospecting movements of failed breeders nesting in an unsuccessful breeding subcolony |
Type |
Journal |
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Year |
2017 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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Volume |
124 |
Issue |
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Pages |
183-191 |
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Keywords |
breeding habitat selection conspecific breeding performance informed dispersal movement ecology nest attendance reproductive failure social information use |
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Abstract |
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Programme |
333 |
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ISSN |
0003-3472 |
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0003-3472 |
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yes |
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Call Number |
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Serial |
6944 |
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Author |
Thierry Anne-Mathilde, Ropert-Coudert Yan, Raclot Thierry, |
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Journal Article |
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Year |
2013 |
Publication |
Conservation Physiology |
Abbreviated Journal |
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Volume |
1 |
Issue |
1 |
Pages |
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Keywords |
Breeding effort, glucocorticoids, Pygoscelis adeliae, reproductive output, Seabird, |
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Programme |
1091 |
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ISSN |
2051-1434 |
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Approved |
yes |
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Call Number |
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Serial |
4514 |
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Journal |
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Year |
2018 |
Publication |
Frontiers in Marine Science |
Abbreviated Journal |
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Volume |
5 |
Issue |
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Pages |
264 |
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Keywords |
Breeding Eco-indicating species extreme events foraging marine protected areas sea ice seabirds |
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Programme |
1091 |
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Thesis |
Bachelor's thesis |
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ISSN |
2296-7745 |
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yes |
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Call Number |
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Serial |
7519 |
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Journal |
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Year |
2022 |
Publication |
PaleoAmerica |
Abbreviated Journal |
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Volume |
8 |
Issue |
1 |
Pages |
29-52 |
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Keywords |
Brazil geofacts Late Glacial Maximum Pedra Furada Peopling of the Americas |
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1217 |
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ISSN |
2055-5563 |
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yes |
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8585 |
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Title |
Global economic costs of aquatic invasive alien species |
Type |
Journal |
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Year |
2021 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
775 |
Issue |
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Pages |
145238 |
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Keywords |
Brackish Freshwater Habitat biases InvaCost Marine Monetary impact |
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Abstract |
Much research effort has been invested in understanding ecological impacts of invasive alien species (IAS) across ecosystems and taxonomic groups, but empirical studies about economic effects lack synthesis. Using a comprehensive global database, we determine patterns and trends in economic costs of aquatic IAS by examining: (i) the distribution of these costs across taxa, geographic regions and cost types; (ii) the temporal dynamics of global costs; and (iii) knowledge gaps, especially compared to terrestrial IAS. Based on the costs recorded from the existing literature, the global cost of aquatic IAS conservatively summed to US$345 billion, with the majority attributed to invertebrates (62%), followed by vertebrates (28%), then plants (6%). The largest costs were reported in North America (48%) and Asia (13%), and were principally a result of resource damages (74%); only 6% of recorded costs were from management. The magnitude and number of reported costs were highest in the United States of America and for semi-aquatic taxa. Many countries and known aquatic alien species had no reported costs, especially in Africa and Asia. Accordingly, a network analysis revealed limited connectivity among countries, indicating disparate cost reporting. Aquatic IAS costs have increased in recent decades by several orders of magnitude, reaching at least US$23 billion in 2020. Costs are likely considerably underrepresented compared to terrestrial IAS; only 5% of reported costs were from aquatic species, despite 26% of known invaders being aquatic. Additionally, only 1% of aquatic invasion costs were from marine species. Costs of aquatic IAS are thus substantial, but likely underreported. Costs have increased over time and are expected to continue rising with future invasions. We urge increased and improved cost reporting by managers, practitioners and researchers to reduce knowledge gaps. Few costs are proactive investments; increased management spending is urgently needed to prevent and limit current and future aquatic IAS damages. |
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0048-9697 |
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yes |
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8089 |
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