| Records |
| Author |
|
| Title |
Where to Forage in the Absence of Sea Ice? Bathymetry As a Key Factor for an Arctic Seabird |
Type |
Journal |
| Year |
2016 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
11 |
Issue |
7 |
Pages |
e0157764 |
| Keywords |
Birds Copepods Foraging Oceans Predation Sea ice Seabirds Zooplankton |
| Abstract |
The earth is warming at an alarming rate, especially in the Arctic, where a marked decline in sea ice cover may have far-ranging consequences for endemic species. Little auks, endemic Arctic seabirds, are key bioindicators as they forage in the marginal ice zone and feed preferentially on lipid-rich Arctic copepods and ice-associated amphipods sensitive to the consequences of global warming. We tested how little auks cope with an ice-free foraging environment during the breeding season. To this end, we took advantage of natural variation in sea ice concentration along the east coast of Greenland. We compared foraging and diving behaviour, chick diet and growth and adult body condition between two years, in the presence versus nearby absence of sea ice in the vicinity of their breeding site. Moreover, we sampled zooplankton at sea when sea ice was absent to evaluate prey location and little auk dietary preferences. Little auks foraged in the same areas both years, irrespective of sea ice presence/concentration, and targeted the shelf break and the continental shelf. We confirmed that breeding little auks showed a clear preference for larger copepod species to feed their chick, but caught smaller copepods and nearly no ice-associated amphipod when sea ice was absent. Nevertheless, these dietary changes had no impact on chick growth and adult body condition. Our findings demonstrate the importance of bathymetry for profitable little auk foraging, whatever the sea-ice conditions. Our investigations, along with recent studies, also confirm more flexibility than previously predicted for this key species in a warming Arctic. |
| Programme |
388 |
| Campaign |
|
| Address |
|
| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
ISSN  |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
6919 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
Trans-Equatorial Migration Routes, Staging Sites and Wintering Areas of a High-Arctic Avian Predator: The Long-tailed Skua (Stercorarius longicaudus) |
Type |
Journal |
| Year |
2013 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
8 |
Issue |
5 |
Pages |
e64614 |
| Keywords |
Animal migration Animal sexual behavior Birds Gulls Latitude Longitude Seabirds Spring (season) |
| Abstract |
|
| Programme |
330,1036 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
Bachelor's thesis |
| Publisher |
|
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
6950 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
Young parents produce offspring with short telomeres: A study in a long-lived bird, the Black-browed Albatross (Thalassarche melanophrys) |
Type |
Journal |
| Year |
2018 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
13 |
Issue |
3 |
Pages |
e0193526 |
| Keywords |
Animal sexual behavior Birds Feathers Foraging Physiological parameters Telomeres Vertebrates Wildlife |
| Abstract |
|
| Programme |
109 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
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| Publisher |
|
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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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 |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7118 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
Avian cholera outbreaks threaten seabird species on Amsterdam Island |
Type |
Journal |
| Year |
2018 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
13 |
Issue |
5 |
Pages |
e0197291 |
| Keywords |
Birds Bone marrow Cholera Islands Pasteurella multocida Penguins Seabirds Sequence databases |
| Abstract |
Infectious diseases may be particularly critical for the conservation of endangered species. A striking example is the recurrent outbreaks that have been occurring in seabirds on Amsterdam Island for the past 30 years, threatening populations of three Endangered seabird species and of the endemic, Critically Endangered Amsterdam albatross Diomedea amsterdamensis. The bacteria Pasteurella multocida (avian cholera causative agent), and to a lesser extent Erysipelothrix rhusiopathiae (erysipelas causative agent), were both suspected to be responsible for these epidemics. Despite this critical situation, demographic trends were not available for these threatened populations, and the occurrence and characterization of potential causative agents of epizootics remain poorly known. The aims of the current study were to (i) provide an update of population trends for four threatened seabird species monitored on Amsterdam Island, (ii) assess the occurrence of P. multocida, and E. rhusiopathiae in live birds from five species, (iii) search for other infectious agents in these samples and, (iv) isolate and genotype the causative agent(s) of epizooties from dead birds. Our study shows that the demographic situation has worsened substantially in three seabird species during the past decade, with extremely low reproductive success and declining populations for Indian yellow-nosed albatrosses Thalassarche carteri, sooty albatrosses Phoebetria fusca, and northern rockhopper penguins Eudyptes moseleyi. Pasteurella multocida or E. rhusiopathiae were detected by PCR in live birds of all five investigated species, while results were negative for eight additional infectious agents. A single strain of P. multocida was repeatedly cultured from dead birds, while no E. rhusiopathiae could be isolated. These results highlight the significance of P. multocida in this particular eco-epidemiological system as the main agent responsible for epizootics. The study stresses the urgent need to implement mitigation measures to alter the course of avian cholera outbreaks threatening the persistence of seabird populations on Amsterdam Island. |
| Programme |
109,1151 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
Bachelor's thesis |
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
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Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7120 |
| Permanent link to this record |
| |
|
| |
| Author |
Tiphaine Jeanniard-du-Dot, Andrew W. Trites, John P. Y. Arnould, Christophe Guinet |
| Title |
Reproductive success is energetically linked to foraging efficiency in Antarctic fur seals |
Type |
Journal |
| Year |
2017 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
12 |
Issue |
4 |
Pages |
e0174001 |
| Keywords |
Accelerometers Antarctica Bioenergetics Foraging Predation Reproductive success Seals Trophic interactions |
| Abstract |
The efficiency with which individuals extract energy from their environment defines their survival and reproductive success, and thus their selective contribution to the population. Individuals that forage more efficiently (i.e., when energy gained exceeds energy expended) are likely to be more successful at raising viable offspring than individuals that forage less efficiently. Our goal was to test this prediction in large long-lived mammals under free-ranging conditions. To do so, we equipped 20 lactating Antarctic fur seals (Arctocephalus gazella) breeding on Kerguelen Island in the Southern Ocean with tags that recorded GPS locations, depth and tri-axial acceleration to determine at-sea behaviours and detailed time-activity budgets during their foraging trips. We also simultaneously measured energy spent at sea using the doubly-labeled water (DLW) method, and estimated the energy acquired while foraging from 1) type and energy content of prey species present in scat remains, and 2) numbers of prey capture attempts determined from head acceleration. Finally, we followed the growth of 36 pups from birth until weaning (of which 20 were the offspring of our 20 tracked mothers), and used the relative differences in body mass of pups at weaning as an index of first year survival and thus the reproductive success of their mothers. Our results show that females with greater foraging efficiencies produced relatively bigger pups at weaning. These mothers achieved greater foraging efficiency by extracting more energy per minute of diving rather than by reducing energy expenditure. This strategy also resulted in the females spending less time diving and less time overall at sea, which allowed them to deliver higher quality milk to their pups, or allowed their pups to suckle more frequently, or both. The linkage we demonstrate between reproductive success and the quality of individuals as foragers provides an individual-based quantitative framework to investigate how changes in the availability and accessibility of prey can affect fitness of animals. |
| Programme |
109 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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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 |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7161 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
Breeding success of a marine central place forager in the context of climate change: A modeling approach |
Type |
Journal |
| Year |
2017 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
12 |
Issue |
3 |
Pages |
e0173797 |
| Keywords |
Animal sexual behavior Bioenergetics Climate change Death rates Foraging Islands Predation Seals |
| Abstract |
|
| Programme |
109 |
| Campaign |
|
| Address |
|
| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
|
Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7170 |
| Permanent link to this record |
| |
|
| |
| Author |
Johannes H. Fischer, Igor Debski, Colin M. Miskelly, Charles A. Bost, Aymeric Fromant, Alan J. D. Tennyson, Jake Tessler, Rosalind Cole, Johanna H. Hiscock, Graeme A. Taylor, Heiko U. Wittmer |
| Title |
Analyses of phenotypic differentiations among South Georgian Diving Petrel (Pelecanoides georgicus) populations reveal an undescribed and highly endangered species from New Zealand |
Type |
Journal |
| Year |
2018 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
13 |
Issue |
6 |
Pages |
e0197766 |
| Keywords |
Biometrics Birds Ears Islands New Zealand Principal component analysis Species delimitation Taxonomy |
| Abstract |
|
| Programme |
394 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
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| Publisher |
|
Place of Publication |
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Editor |
|
| Language |
|
Summary Language |
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Original Title |
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| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7192 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
Diatom-Specific Highly Branched Isoprenoids as Biomarkers in Antarctic Consumers |
Type |
Journal |
| Year |
2013 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
8 |
Issue |
2 |
Pages |
e56504 |
| Keywords |
Antarctica Biomarkers Islands Penguins Petrels Sea ice Seabirds Stomach |
| Abstract |
|
| Programme |
131 |
| Campaign |
|
| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
|
| Language |
|
Summary Language |
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Original Title |
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| Series Editor |
|
Series Title |
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Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7215 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
|
Type |
Journal |
| Year |
2013 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
8 |
Issue |
9 |
Pages |
e74154 |
| Keywords |
Birds Body temperature Gene expression Mitochondria Muscle biochemistry Penguins Skeletal muscles Thermogenesis |
| Abstract |
|
| Programme |
131 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7217 |
| Permanent link to this record |
| |
|
| |
| Author |
|
| Title |
Where to Forage in the Absence of Sea Ice? Bathymetry As a Key Factor for an Arctic Seabird |
Type |
Journal |
| Year |
2016 |
Publication |
PLOS ONE |
Abbreviated Journal |
|
| Volume |
11 |
Issue |
7 |
Pages |
e0157764 |
| Keywords |
Birds Copepods Foraging Oceans Predation Sea ice Seabirds Zooplankton |
| Abstract |
The earth is warming at an alarming rate, especially in the Arctic, where a marked decline in sea ice cover may have far-ranging consequences for endemic species. Little auks, endemic Arctic seabirds, are key bioindicators as they forage in the marginal ice zone and feed preferentially on lipid-rich Arctic copepods and ice-associated amphipods sensitive to the consequences of global warming. We tested how little auks cope with an ice-free foraging environment during the breeding season. To this end, we took advantage of natural variation in sea ice concentration along the east coast of Greenland. We compared foraging and diving behaviour, chick diet and growth and adult body condition between two years, in the presence versus nearby absence of sea ice in the vicinity of their breeding site. Moreover, we sampled zooplankton at sea when sea ice was absent to evaluate prey location and little auk dietary preferences. Little auks foraged in the same areas both years, irrespective of sea ice presence/concentration, and targeted the shelf break and the continental shelf. We confirmed that breeding little auks showed a clear preference for larger copepod species to feed their chick, but caught smaller copepods and nearly no ice-associated amphipod when sea ice was absent. Nevertheless, these dietary changes had no impact on chick growth and adult body condition. Our findings demonstrate the importance of bathymetry for profitable little auk foraging, whatever the sea-ice conditions. Our investigations, along with recent studies, also confirm more flexibility than previously predicted for this key species in a warming Arctic. |
| Programme |
388 |
| Campaign |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1932-6203 |
ISBN |
1932-6203 |
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7299 |
| Permanent link to this record |
