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Title |
Marked phylogeographic structure of Gentoo penguin reveals an ongoing diversification process along the Southern Ocean |
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Book Chapter |
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Year |
2017 |
Publication |
Molecular phylogenetics and evolution |
Abbreviated Journal |
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Volume |
107 |
Issue |
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Pages |
486-498 |
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Keywords |
Climate change Demographic history Polar region Population structure Seabirds |
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137,354 |
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Bachelor's thesis |
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ISSN |
1055-7903 |
ISBN  |
1055-7903 |
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yes |
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6578 |
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Title |
167 individuals versus millions of hooks: bycatch mitigation in longline fisheries underlies conservation of Amsterdam albatrosses |
Type |
Journal |
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Year |
2016 |
Publication |
Aquatic Conservation: Marine and Freshwater Ecosystems |
Abbreviated Journal |
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Volume |
26 |
Issue |
4 |
Pages |
674-688 |
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Keywords |
birds distribution endangered species fishing island ocean tracking |
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Abstract |
Abstract 1. Industrial fisheries represent one of the most serious threats worldwide to seabird conservation. Death of birds in fishing operations (i.e. bycatch) has especially adverse effects on populations of albatrosses, which have extremely low fecundity. 2. The single population worldwide of Amsterdam albatross (Diomedea amsterdamensis) comprises only 167 individuals and risks considerable decline over the mid?term from additional mortality levels potentially induced by fisheries. The priority actions listed in the current conservation plan for this species included characterizing the longline fisheries operating within its range, dynamically analysing the overlap between albatrosses and these fisheries, and providing fisheries management authorities with potential impact estimates of longline fisheries on the Amsterdam albatross. 3. During all life?cycle stages and year quarters the birds overlapped extensively with fishing effort in the southern Indian and Atlantic oceans. Fishing effort, and consequently overlap score (calculated as the product of fishing effort and time spent by the birds in a spatial unit) was highest in July?September (45% of the hooks annually deployed). Just three fleets (Taiwanese, Japanese and Spanish) contributed to >98% of the overlap scores for each stage (72% from the Taiwanese fleet alone, on average). Daily overlap scores were higher for the non?breeding versus the breeding stages (3?fold factor on average). 4. Based on previous bycatch rates for other albatross species, this study estimated that longline fisheries currently have the potential to remove ~2?16 individuals (i.e. ~5%) each year from the total Amsterdam albatross population, depending on whether bycatch mitigation measures were or were not systematically employed during the fishing operations. 5. Recent bycatch mitigation measures may be instrumental in the conservation of the Amsterdam albatross. This study suggests three further key recommendations: (1) to focus conservation efforts on the austral winter; (2) to require all operating vessels to report ring recoveries; and (3) to allocate special regulation of fishing operations in the areas of peak bycatch risk for the Amsterdam albatrosses. Copyright ? 2015 John Wiley & Sons, Ltd. |
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109 |
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ISSN |
1052-7613 |
ISBN |
1052-7613 |
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yes |
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6628 |
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Author |
Julien Collet, Samantha C. Patrick, Henri Weimerskirch |
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Title |
A comparative analysis of the behavioral response to fishing boats in two albatross species |
Type |
Journal |
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Year |
2017 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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Volume |
28 |
Issue |
5 |
Pages |
1337-1347 |
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Abstract |
Anthropogenic food resources have significantly modified the foraging behavior of many animal species. They enhance large multi-specific aggregations of individuals, with strong ecological consequences. It is challenging to predict how individuals or species can differ in their reaction to these resources. For instance, there are wide variations in seabird species abundance behind fishing boats, and individual variations in interaction rates. Whether this is reflecting variations in fine-scale encounter rates or rather variations in attraction strength is poorly quantified. Here we compare the response of Wandering (WA) and Black-browed (BBA) albatrosses to fishing boats operating in sub-Antarctic waters. We use GPS tracking data from both birds and boats (Vessel Monitoring System). Attraction distances were similar between the 2 species (up to 30 km). BBA foraged further from fishing grounds and encountered boats less frequently than WA, but once they encountered a boat BBA were more strongly attracted (80% vs. 60% chance) and had a higher level of active interaction, compared to WA. Furthermore, in the absence of boats, BBA were rarely observed foraging over the habitat where the fisheries mainly operate, in contrast with WA. We thus report qualitative and quantitative differences in the response of these 2 species to the same fishing fleet. WA, the larger, more dominant and more generalist species was unexpectedly less attracted to fishing vessels. Comparing our results with previously published studies, we suggest that energetic requirements of individuals may be a crucial predictor for assessing risks of interactions with anthropogenic food resources. |
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109 |
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ISSN |
1045-2249 |
ISBN |
1045-2249 |
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yes |
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Serial |
6657 |
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Title |
Individual parameters shape foraging activity in breeding king penguins |
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Journal |
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Year |
2016 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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Volume |
27 |
Issue |
1 |
Pages |
352-362 |
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137 |
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ISSN |
1045-2249 |
ISBN |
1045-2249 |
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yes |
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Call Number |
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Serial |
6699 |
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Author |
Julien Collet, Samantha C. Patrick, Henri Weimerskirch |
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Title |
A comparative analysis of the behavioral response to fishing boats in two albatross species |
Type |
Journal |
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Year |
2017 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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Volume |
28 |
Issue |
5 |
Pages |
1337-1347 |
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Keywords |
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Abstract |
Lay Summary. Smaller and less generalist Black-Browed albatrosses were more strongly attracted to encountered fishing boats than dominant Wandering albatrosses |
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Programme |
109 |
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1045-2249 |
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1045-2249 |
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yes |
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Serial |
7155 |
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Author |
Karine Delord, Christophe Barbraud, David Pinaud, Stephanie Ruault, Samantha C. Patrick, Henri Weimerskirch |
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Title |
Individual consistency in the non-breeding behavior of a long-distance migrant seabird, the Grey Petrel Procellaria cinerea |
Type |
Journal |
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Year |
2019 |
Publication |
Marine ornithology |
Abbreviated Journal |
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Volume |
47 |
Issue |
1 |
Pages |
93-103 |
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Abstract |
There is growing interest in the consistency of individual differences in animal behavior as it relates to life history traits and fitness. Despite the relatively large number of studies investigating repeatable behaviors, studies have only recently investigated repeatability in foraging or migratory behaviors, and this has seldom been explored between years. We examined the individual consistency in foraging behavior of the Grey Petrel Procellaria cinerea, a pelagic long-distance migrant seabird. We analyzed how foraging, activity, and migratory patterns were repeatable across different seasons. We used tracking data to monitor the migratory movements and behavior of individuals during the non-breeding period over five years. Despite the small sample size, we found that there was a relatively high individual consistency in wintering strategies across years, with birds displaying high fidelity to their non-breeding destinations during consecutive years. Activity parameters, date of departure of inward migration, duration of migration, and duration spent in non-breeding areas were repeatable as well. The duration of the non-breeding period was the most repeatable, reflecting consistent departure times and, to a lesser extent, consistent arrival times. A high overall repeatability was seen in the timing of return migration. With respect to sex, males tended to be more consistent in their migration strategy (i.e., timing of migration, time spent in non-breeding areas) than females. Although conditions during the Holocene have generally been stable in the Southern Ocean, species lacking variability in migratory traits are probably at a considerable disadvantage in terms of their capacity to respond to the rapid environmental changes currently underway. |
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109 |
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ISSN |
1018-3337, 2074-1235 |
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1018-3337, 2074-1235 |
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yes |
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Serial |
6149 |
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Title |
Lagrangian analysis of multi-satellite data in support of open ocean Marine Protected Area design |
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Journal |
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Year |
2017 |
Publication |
Deep sea research part ii: topical studies in oceanography |
Abbreviated Journal |
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Volume |
140 |
Issue |
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Pages |
212-221 |
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Programme |
394 |
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ISSN |
0967-0645 |
ISBN |
0967-0645 |
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yes |
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Serial |
6586 |
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Title |
Micronektonic fish species over three seamounts in the southwestern Indian Ocean |
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Journal |
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Year |
2020 |
Publication |
Deep Sea Research Part II: Topical Studies in Oceanography |
Abbreviated Journal |
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176 |
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Pages |
104777 |
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Keywords |
Lanternfish Tropical waters |
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109 |
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0967-0645 |
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0967-0645 |
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yes |
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Serial |
8073 |
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Title |
Fathers matter: male body mass affects life-history traits in a size-dimorphic seabird |
Type |
Journal |
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Year |
2017 |
Publication |
Proc. R. Soc. B |
Abbreviated Journal |
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Volume |
284 |
Issue |
1854 |
Pages |
20170397 |
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Programme |
109 |
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ISSN |
0962-8452, 1471-2954 |
ISBN |
0962-8452, 1471-2954 |
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yes |
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6637 |
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Title |
King penguin demography since the last glaciation inferred from genome-wide data |
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Journal |
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Year |
2014 |
Publication |
Proc. R. Soc. B |
Abbreviated Journal |
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Volume |
281 |
Issue |
1787 |
Pages |
20140528 |
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Abstract |
How natural climate cycles, such as past glacial/interglacial patterns, have shaped species distributions at the high-latitude regions of the Southern Hemisphere is still largely unclear. Here, we show how the post-glacial warming following the Last Glacial Maximum (ca 18 000 years ago), allowed the (re)colonization of the fragmented sub-Antarctic habitat by an upper-level marine predator, the king penguin Aptenodytes patagonicus. Using restriction site-associated DNA sequencing and standard mitochondrial data, we tested the behaviour of subsets of anonymous nuclear loci in inferring past demography through coalescent-based and allele frequency spectrum analyses. Our results show that the king penguin population breeding on Crozet archipelago steeply increased in size, closely following the Holocene warming recorded in the Epica Dome C ice core. The following population growth can be explained by a threshold model in which the ecological requirements of this species (year-round ice-free habitat for breeding and access to a major source of food such as the Antarctic Polar Front) were met on Crozet soon after the Pleistocene/Holocene climatic transition. |
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137 |
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0962-8452, 1471-2954 |
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0962-8452, 1471-2954 |
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yes |
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Call Number |
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6687 |
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