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Title |
Intra- and inter-individual variation in the foraging ecology of a generalist subantarctic seabird, the gentoo penguin |
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Journal |
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Year |
2017 |
Publication |
Marine ecology progress series |
Abbreviated Journal |
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Volume |
578 |
Issue |
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Pages |
227-242 |
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Keywords |
Behavioural consistency Diving behaviour Feeding ecology Foraging behaviour Individual specialisations Pygoscelis papua Stable isotopes |
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394 |
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ISSN |
0171-8630, 1616-1599 |
ISBN  |
0171-8630, 1616-1599 |
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yes |
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Serial |
6584 |
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Title |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
565 |
Issue |
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Pages |
197-215 |
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Keywords |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes |
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Abstract |
Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish prey included mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides being the main item. Cephalopod beaks were identified, most of which were from adult oceanic squids. Albatrosses preyed upon the same taxa at both localities, but in different proportions. Histioteuthis atlantica (30% by number), Galiteuthis glacialis (13%), and Kondakovia longimana (10%) were the main squid prey at Kerguelen, while K. longimana (35%) and H. eltaninae (23%) dominated at Crozet. Chick feather ?15N values were higher in wandering albatrosses than in other oceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumer together with the sperm whale and sleeper shark that have similar ?15N values. Satellite-tracked wandering albatrosses foraged in local subantarctic waters and farther north, with some Crozet birds overlapping with those from the Kerguelen population in western Kerguelen waters. Anthropogenic items (e.g. plastic fragments, hooks) were found in half the food samples. All fishery-related items were from the local toothfish fishery. The high number of hooks from Crozet indicated the presence of a fairly large number of illegal longliners in the area during the Austral winter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietary investigations to achieve effective conservation and management of this endangered group of charismatic seabirds. |
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109 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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yes |
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Serial |
6635 |
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Title |
Predicting prey capture rates of southern elephant seals from track and dive parameters |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
541 |
Issue |
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Pages |
265-277 |
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Keywords |
Biologging Dive parameters Foraging Marine predator Prey capture events Southern elephant seals Track parameters |
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Programme |
109 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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Approved |
yes |
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Call Number |
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Serial |
6665 |
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Title |
Multi-colony tracking reveals spatio-temporal variation in carry-over effects between breeding success and winter movements in a pelagic seabird |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
578 |
Issue |
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Pages |
167-181 |
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Keywords |
Black-legged kittiwake Geolocation Life-history strategies Migration North Atlantic Reproduction Rissa tridactyla Seasonal interactions |
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Abstract |
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Programme |
333 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6941 |
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Title |
Methods for improving species distribution models in data-poor areas: example of sub-Antarctic benthic species on the Kerguelen Plateau |
Type |
Journal |
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Year |
2018 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
594 |
Issue |
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Pages |
149-164 |
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Keywords |
Historical datasets Kerguelen Plateau Model performance Presence-only data Species distribution modeling |
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Abstract |
Species distribution models (SDMs) are essential tools to aid conservation biologists in evaluating the combined effects of environmental change and human activities on natural habitats and for the development of relevant conservation plans. However, modeling species distributions over vast and remote regions is often challenging due to poor and heterogeneous data sets, and this raises questions regarding the relevance of the modeling procedures. In recent years, there have been many methodological developments in SDM procedures using virtual species and broad data sets, but few solutions have been proposed to deal with poor or heterogeneous data. In the present work, we address this methodological challenge by studying the performance of different modeling procedures based on 4 real species, using presence-only data compiled from various oceanographic surveys on the Kerguelen Plateau (Southern Ocean). We followed a practical protocol to test for the reliability and performance of the models and to correct for limited and aggregated data, as well as accounting for spatial and temporal sampling biases. Our results show that producing reliable SDMs is feasible as long as the amount and quality of available data allow testing and correcting for these biases. However, we found that SDMs could be corrected for spatial and temporal heterogeneities in only 1 of the 4 species we examined, highlighting the need to consider all potential biases when modeling species distributions. Finally, we show that model reliability and performance also depend on the interaction between the incompleteness of the data and species niches, with the distribution of narrow-niche species being less sensitive to data gaps than species occupying wider niches. |
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Programme |
1044 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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Approved |
yes |
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Call Number |
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Serial |
7106 |
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| Permanent link to this record |
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Author |
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Title |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
Type |
Journal |
| |
Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
|
|
| |
Volume |
565 |
Issue |
|
Pages |
197-215 |
|
| |
Keywords |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes |
|
| |
Abstract |
Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish prey included mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides being the main item. Cephalopod beaks were identified, most of which were from adult oceanic squids. Albatrosses preyed upon the same taxa at both localities, but in different proportions. Histioteuthis atlantica (30% by number), Galiteuthis glacialis (13%), and Kondakovia longimana (10%) were the main squid prey at Kerguelen, while K. longimana (35%) and H. eltaninae (23%) dominated at Crozet. Chick feather ?15N values were higher in wandering albatrosses than in other oceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumer together with the sperm whale and sleeper shark that have similar ?15N values. Satellite-tracked wandering albatrosses foraged in local subantarctic waters and farther north, with some Crozet birds overlapping with those from the Kerguelen population in western Kerguelen waters. Anthropogenic items (e.g. plastic fragments, hooks) were found in half the food samples. All fishery-related items were from the local toothfish fishery. The high number of hooks from Crozet indicated the presence of a fairly large number of illegal longliners in the area during the Austral winter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietary investigations to achieve effective conservation and management of this endangered group of charismatic seabirds. |
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Programme |
109 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7153 |
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Author |
Joffrey Jouma'a, Yves Le Bras, Baptiste Picard, Christophe Guinet |
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Title |
Three-dimensional assessment of hunting strategies in a deep diving predator, southern elephant seal Mirounga leonina |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
573 |
Issue |
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Pages |
255-268 |
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Keywords |
Accelerometer Acousonde? Area restricted search Data mining Foraging Machine learning Spherical first passage time Unsupervised classification |
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Abstract |
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Programme |
109 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
Medium |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7166 |
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Author |
P. E. Michael, R. Thomson, C. Barbraud, K. Delord, S. De Grissac, A. J. Hobday, P. G. Strutton, G. N. Tuck, H. Weimerskirch, C. Wilcox |
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Title |
Illegal fishing bycatch overshadows climate as a driver of albatross population decline |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
579 |
Issue |
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Pages |
185-199 |
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Keywords |
and unregulated (IUU) fishing Black-browed albatross Demographics Illegal Integrated population model Kerguelen Island Thalassarche melanophris unreported |
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Abstract |
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Programme |
109 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
Medium |
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Expedition |
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Approved |
yes |
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Call Number |
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Serial |
7171 |
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| Permanent link to this record |
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Author |
Malcolm O'Toole, Christophe Guinet, Mary-Anne Lea, Mark A. Hindell |
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Title |
Marine predators and phytoplankton: how elephant seals use the recurrent Kerguelen plume |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
581 |
Issue |
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Pages |
215-227 |
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Keywords |
Dive behaviour Foraging strategy Kerguelen phytoplankton plume Mirounga leonina Prey access Prey encounter events |
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Abstract |
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Programme |
109,1201 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Summary Language |
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Series Editor |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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Expedition |
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Approved |
yes |
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Call Number |
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Serial |
7173 |
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Author |
Lisa A. Sztukowski, Peter A. Cotton, Henri Weimerskirch, David R. Thompson, Leigh G. Torres, Paul M. Sagar, Antony M. Knights, Annette L. Fayet, Stephen C. Votier |
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Title |
Sex differences in individual foraging site fidelity of Campbell albatross |
Type |
Journal |
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Year |
2018 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
601 |
Issue |
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Pages |
227-238 |
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Keywords |
Foraging effort GPS tracking Repeatability Route fidelity Sex effects |
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Abstract |
Inter-individual variation in behavioural traits has important implications for evolutionary and ecological processes. Site fidelity, where individuals consistently use the same foraging site, is common among marine predators. Sex differences in foraging are also well studied in marine vertebrates, but the extent to which consistent inter-individual differences in foraging vary between the sexes is poorly known. Here we quantified the effects of sex on individual foraging site fidelity (IFSF), both within and between years, in chick-brooding Campbell albatross Thalassarche impavida. Using bird-borne global positioning system loggers, we calculated route fidelity (nearest-neighbour distance), repeatability of site fidelity (terminal latitude and longitude), and foraging effort (total distance travelled and trip duration) during 2 to 10 repeat trips. Overall, Campbell albatrosses showed a high degree of site fidelity. Birds travelled to similar sites not only within the same year, but also between 2 consecutive years, suggesting that the within-year consistency is not simply in response to short-term patches of food. Moreover, within the same year, we found differences in terms of IFSF between the sexes. Females that foraged closer to the colony in neritic and shelf waters were more likely to follow similar routes on repeated foraging trips and were more consistent in their foraging effort than males. Males that foraged further offshore in pelagic waters had more repeatable foraging longitudes than females. Our study provides further evidence of the importance of IFSF among marine vertebrates. However, it also reveals that the strength of such specialisations may vary with sex. |
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Programme |
109 |
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ISSN |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
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Approved |
yes |
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Call Number |
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Serial |
7188 |
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| Permanent link to this record |
