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Title |
Big data approaches to the spatial ecology and conservation of marine megafauna |
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Journal |
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Year |
2022 |
Publication |
ICES Journal of Marine Science |
Abbreviated Journal |
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Volume  |
79 |
Issue |
4 |
Pages |
975-986 |
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Programme |
109,388,1201 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1054-3139 |
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yes |
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Call Number |
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Serial |
8332 |
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Author |
C. A. Bost, K. Delord, Y. Cherel, C. M. Miskelly, A. Carravieri, P. Bustamante, J. P. Y. Arnould, A. Fromant |
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Title |
Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
Type |
Journal |
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Year |
2022 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
689 |
Issue |
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Pages |
169-177 |
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Keywords |
At-sea distribution Pelecanoides georgicus Procellariiformes Southern Ocean Trophic niche |
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Abstract |
Seabirds are central place foragers, relying on prey that is patchily distributed and of variable predictability. Species travelling at a high energetic cost are more strongly dependent on spatially predictable prey. This is the case for diving petrels Pelecanoides spp., which are small Procellariiformes that feed by pursuit diving and travel by flapping constantly. Despite their abundance and importance as zooplankton consumers, information on the foraging strategy of diving petrels is still lacking. The detailed at-sea movements and the trophic niche of the South Georgian diving petrel P. georgicus was investigated for the first time using miniaturized GPS and the stable isotope method, respectively. Overall, South Georgian diving petrels from the Kerguelen Islands performed unexpected, direct and long-distance trips (mean foraging range: 191-217 km) to the Antarctic Polar Front, south of the archipelago. This foraging ground is a productive and predictable area, where the birds stopped and fed at the distal part of their trip. Blood isotopic values indicate that the tracked birds fed consistently on macrozooplankton. Such a distant oceanic feeding strategy contrasts with the coastal foraging patterns of the closely related common diving petrel P. urinatrix. Commuting to a more distant but easily accessible resource allows South Georgian diving petrels to cope with their high commuting costs, and to segregate spatially from the sympatric common diving petrel during the breeding season. |
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Programme |
109,394 |
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Thesis |
Bachelor's thesis |
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ISSN |
0171-8630, 1616-1599 |
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yes |
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Call Number |
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Serial |
8364 |
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Title |
Mercury contamination and potential health risks to Arctic seabirds and shorebirds |
Type |
Journal |
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Year |
2022 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
844 |
Issue |
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Pages |
156944 |
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Keywords |
Arctic Birds Mercury Toxicity benchmarks Toxicological effects |
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Abstract |
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Programme |
330,388,1036,1210 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
0048-9697 |
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Approved |
yes |
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Call Number |
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Serial |
8388 |
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Title |
Quantitative meta-analysis reveals no association between mercury contamination and body condition in birds |
Type |
Journal |
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Year |
2022 |
Publication |
Biological Reviews |
Abbreviated Journal |
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Volume |
97 |
Issue |
4 |
Pages |
1253-1271 |
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Keywords |
blood body mass energetics fat feather feeding habitat metabolism species |
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Abstract |
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Programme |
109,330,388,1036,1210 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1469-185X |
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Approved |
yes |
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Call Number |
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Serial |
8400 |
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Title |
Sex, body size, and boldness shape the seasonal foraging habitat selection in southern elephant seals |
Type |
Journal |
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Year |
2022 |
Publication |
Ecology and Evolution |
Abbreviated Journal |
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Volume |
12 |
Issue |
1 |
Pages |
e8457 |
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Keywords |
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Abstract |
Selecting foraging habitat is a fundamental behavior in the life of organisms as it directly links resource acquisition to fitness. Differences in habitat selection among individuals may arise from several intrinsic and extrinsic factors, and yet, their interaction has been given little attention in the study of wild populations. We combine sex, body size, and boldness to explain individual differences in the seasonal foraging habitat selection of southern elephant seals (Mirounga leonina) from the Kerguelen Archipelago. We hypothesize that habitat selection is linked to the trade-off between resource acquisition and risk, and that individuals differ in their position along this trade-off because of differences in reproductive strategies, life stages, and metabolic requirements. Before the post-molt foraging trip, we used a novel object approach test to quantify the boldness of 28 subadult and adult females and 42 subadult males and equipped them with data loggers to track their movements at sea. Subadult males selected neritic and oceanic habitats, whereas females mostly selected less productive oceanic habitats. Both sexes showed a seasonal shift from Antarctic habitats in the south in the summer to the free of ice subantarctic and subtropical habitats in the north in the winter. Males avoided oceanic habitats and selected more productive neritic and Antarctic habitats with body size mostly in the winter. Bolder males selected northern warmer waters in winter, while shyer ones selected the Kerguelen plateau and southern colder oceanic waters. Bolder females selected the Kerguelen plateau in the summer when prey profitability is assumed to be the highest. This study not only provides new insights into the spatiotemporal foraging ecology of elephant seals in relation to personality but also emphasizes the relevance of combining several intrinsic and extrinsic factors in understanding among-individual variation in space use essential in wildlife management and conservation. |
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Programme |
109,1201 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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ISSN |
2045-7758 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8405 |
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Author |
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Title |
Temporal trends of mercury in Arctic biota: 10 more years of progress in Arctic monitoring |
Type |
Journal |
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Year |
2022 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
839 |
Issue |
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Pages |
155803 |
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Keywords |
Arctic Biota Environmental monitoring Mercury Statistical assessment Temporal trends |
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Abstract |
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Programme |
330,388 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0048-9697 |
ISBN |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8422 |
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| Permanent link to this record |
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Author |
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Title |
The Microwave Snow Grain Size: A New Concept to Predict Satellite Observations Over Snow-Covered Regions |
Type |
Journal |
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Year |
2022 |
Publication |
AGU Advances |
Abbreviated Journal |
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Volume |
3 |
Issue |
4 |
Pages |
e2021AV000630 |
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Keywords |
microstructure microwave modeling porous media remote sensing snow |
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Abstract |
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Programme |
1110,1177 |
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Thesis |
Bachelor's thesis |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISSN |
2576-604X |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8424 |
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Author |
D. Noll, F. Leon, D. Brandt, P. Pistorius, C. Le Bohec, F. Bonadonna, P. N. Trathan, A. Barbosa, A. Raya Rey, G. P. M. Dantas, R. C. K. Bowie, E. Poulin, J. A. Vianna |
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Title |
Positive selection over the mitochondrial genome and its role in the diversification of gentoo penguins in response to adaptation in isolation |
Type |
Journal |
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Year |
2022 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
12 |
Issue |
1 |
Pages |
3767 |
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Keywords |
Evolution Evolutionary genetics |
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Abstract |
Although mitochondrial DNA has been widely used in phylogeography, evidence has emerged that factors such as climate, food availability, and environmental pressures that produce high levels of stress can exert a strong influence on mitochondrial genomes, to the point of promoting the persistence of certain genotypes in order to compensate for the metabolic requirements of the local environment. As recently discovered, the gentoo penguins (Pygoscelis papua) comprise four highly divergent lineages across their distribution spanning the Antarctic and sub-Antarctic regions. Gentoo penguins therefore represent a suitable animal model to study adaptive processes across divergent environments. Based on 62 mitogenomes that we obtained from nine locations spanning all four gentoo penguin lineages, we demonstrated lineage-specific nucleotide substitutions for various genes, but only lineage-specific amino acid replacements for the ND1 and ND5 protein-coding genes. Purifying selection (dN/dS??1) was mostly present in codons of the Complex I (NADH genes), supported by two different codon-based methods at the ND1 and ND4 in the most divergent lineages, the eastern gentoo penguin from Crozet and Marion Islands and the southern gentoo penguin from Antarctica respectively. Additionally, ND5 and ATP6 were under selection in the branches of the phylogeny involving all gentoo penguins except the eastern lineage. Our study suggests that local adaptation of gentoo penguins has emerged as a response to environmental variability promoting the fixation of mitochondrial haplotypes in a non-random manner. Mitogenome adaptation is thus likely to have been associated with gentoo penguin diversification across the Southern Ocean and to have promoted their survival in extreme environments such as Antarctica. Such selective processes on the mitochondrial genome may also be responsible for the discordance detected between nuclear- and mitochondrial-based phylogenies of gentoo penguin lineages. |
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Programme |
137,354 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISSN |
2045-2322 |
ISBN |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8457 |
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| Permanent link to this record |
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Author |
Fernando Arce, Mark A. Hindell, Clive R. McMahon, Simon J. Wotherspoon, Christophe Guinet, Robert G. Harcourt, Sophie Bestley |
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Title |
Elephant seal foraging success is enhanced in Antarctic coastal polynyas |
Type |
Journal |
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Year |
2022 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
Abbreviated Journal |
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Volume |
289 |
Issue |
1967 |
Pages |
20212452 |
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Keywords |
body condition drift rates foraging behaviour Mirounga leonina post-polynyas Southern Ocean |
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Abstract |
Antarctic polynyas are persistent open water areas which enable early and large seasonal phytoplankton blooms. This high primary productivity, boosted by iron supply from coastal glaciers, attracts organisms from all trophic levels to form a rich and diverse community. How the ecological benefit of polynya productivity is translated to the highest trophic levels remains poorly resolved. We studied 119 southern elephant seals feeding over the Antarctic shelf and demonstrated that: (i) 96% of seals foraging here used polynyas, with individuals spending on average 62% of their time there; (ii) the seals exhibited more area-restricted search behaviour when in polynyas; and (iii) these seals gained more energy (indicated by increased buoyancy from greater fat stores) when inside polynyas. This higher-quality foraging existed even when ice was not present in the study area, indicating that these are important and predictable foraging grounds year-round. Despite these energetic advantages from using polynyas, not all the seals used them extensively. Factors other than food supply may influence an individual's choice in their use of feeding grounds, such as exposure to predation or the probability of being able to return to distant sub-Antarctic breeding sites. |
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Programme |
109,1201 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7983 |
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| Permanent link to this record |
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Author |
Mark Andrew Hindell, Clive Reginald McMahon, Christophe Guinet, Rob Harcourt, Ian David Jonsen, Ben Raymond, Dale Maschette |
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Title |
Assessing the potential for resource competition between the Kerguelen Plateau fisheries and southern elephant seals |
Type |
Journal |
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Year |
2022 |
Publication |
Frontiers in Marine Science |
Abbreviated Journal |
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Volume |
9 |
Issue |
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Pages |
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Keywords |
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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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Place of Publication |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2296-7745 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8561 |
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| Permanent link to this record |
