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Author |
Labat J.P., Mayzaud P. & Sabini S. |
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Title |
Population dynamics of Themisto gaudichaudii in Kerguelen Islands waters, Southern Indian Ocean. |
Type |
Journal Article |
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Year |
2005 |
Publication |
Polar biology |
Abbreviated Journal |
Polar Biol. |
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Volume |
28 |
Issue |
10 |
Pages |
776-783 |
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Keywords |
Invertebrata ; Arthropoda ; Crustacea ; Aquatic environment ; Climatic zone ; Antarctic Islands ; Kerguelen Islands ; Amphipoda ; Marine environment ; Polar region ; Indian Ocean ; Southern Ocean ; Kerguelen Islands ; Population dynamics |
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Abstract |
Fieldwork was carried out at Kerguelen Islands. Two groups of stations in a coastal area, the Morbihan gulf, were surveyed. At both stations, macroplankton biomass ranged from 2.3 mg dry weight m-3 to 89 mg dry weight m-3and consisted mostly of Themisto gaudichaudii with values ranging from 1.9 mg dry weight m-3 to 50.6 mg dry weight m-3. Biomass was high for sub-Antarctic waters with marked seasonal and inter-zone differences. Biomass minima were observed at the end of the winter, from September to November, while maxima were recorded in summer and in early fall at the beginning of the year between January and April. T. gaudichaudii showed a recruitment of new size classes, mainly from November to January, followed by a rapid growth phase in summer. which slowed down during the southern winter period. Individuals breed after 1 year. Large individuals, older than 1 year, were not a significant presence in the gulf of Morbihan. The main pattern of the population dynamics were characterised by an univoltine life cycle with a very high biomass marked by a strong seasonal signal linked with the hydrological and trophic parameters of the Gulf. |
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Programme |
353 |
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ISSN |
0722-4060 |
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yes |
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Call Number |
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Serial |
3093 |
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Author |
Nesterova Anna, Le Bohec Céline, Beaune David, Pettex Emeline, Le Maho Yvon, Bonadonna Francesco, |
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Title |
Do penguins dare to walk at night? Visual cues influence king penguin colony arrivals and departures
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Type |
Journal Article |
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Year |
2010 |
Publication |
Behavioral Ecology and Sociobiology |
Abbreviated Journal |
Behav. Ecol. Sociobiol. (Print) |
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Volume |
64 |
Issue |
7 |
Pages |
1145-1156 |
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Keywords |
Biomedical and Life Sciences, |
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Abstract |
Orientation based on visual cues can be extremely difficult in crowded bird colonies due to the presence of many individuals. We studied king penguins (Aptenodytes patagonicus) that live in dense colonies and are constantly faced with such problems. Our aims were to describe adult penguin homing paths on land and to test whether visual cues are important for their orientation in the colony. We also tested the hypothesis that older penguins should be better able to cope with limited visual cues due to their greater experience. We collected and examined GPS paths of homing penguins. In addition, we analyzed 8 months of penguin arrivals to and departures from the colony using data from an automatic identification system. We found that birds rearing chicks did not minimize their traveling time on land and did not proceed to their young (located in crèches) along straight paths. Moreover, breeding birds' arrivals and departures were affected by the time of day and luminosity levels. Our data suggest that king penguins prefer to move in and out of the colony when visual cues are available. Still, they are capable of navigating even in complete darkness, and this ability seems to develop over the years, with older breeding birds more likely to move through the colony at nighttime luminosity levels. This study is the first step in unveiling the mysteries of king penguin orientation on land. |
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Programme |
137;354 |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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ISSN |
0340-5443 |
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yes |
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Serial |
320 |
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Author |
Karine Delord, Cédric Cotté, Pascal Terray, Charles-André Bost, Henri Weimerskirch, Christophe Barbraud |
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Title |
Factors affecting adult body condition in the endangered northern rockhopper penguin |
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Journal |
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Year |
2021 |
Publication |
Marine Biology |
Abbreviated Journal |
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Volume |
168 |
Issue |
3 |
Pages |
27 |
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Abstract |
Understanding the factors that drive the dynamics of populations of long‐lived species presents a unique challenge for conservation management. Here, we investigated long-term change in the body condition of adult northern rockhopper penguins Eudyptes moseleyi at Amsterdam Island, southern Indian Ocean, which hosts 5–10% of the global population of this endangered species. Analysis of a long‐term dataset (1994–2016), concurrent to the population's rapid decline, revealed no trend in adult northern rockhopper penguin body condition over time at the stages considered in this study, i.e. breeding and moulting. However, body condition varied between years and sexes and part of this variation was explained by environmental factors. Males were on average in better condition than females whatever the stage and individuals on average were in better condition during the moulting compared to the breeding period. The environmental conditions [sea surface temperature anomaly (SSTa), Subtropical Indian Ocean Dipole (SIOD) and Southern Annular Mode (SAM)] appeared to impact non-linearly the body condition. Overall, females were in better condition for negative values of SAM, SIOD and SSTa. The body condition of males exhibited similar but less complex and more significant patterns, with decreasing body condition for increasing SAM, SIOD and SSTa. The absence of long-term trends in male and female body condition suggests that the very low reproductive output and declining population since 1997 is probably not the result of environmental conditions during pre-breeding and pre-moult and necessitates further research into possible drivers during the breeding season. |
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Programme |
109,394 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1432-1793 |
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Approved |
yes |
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Call Number |
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Serial |
7792 |
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Author |
Kaiser Stefanie, Brandão Simone N, Brix Saskia, Barnes David K A, Bowden David A, Ingels Jeroen, Leese Florian, Schiaparelli Stefano, Arango Claudia P, Badhe Renuka, Bax Narissa, Blazewicz-Paszkowycz Magdalena, Brandt Angelika, Brenke Nils, Catarino Ana I, David Bruno, Ridder Chantal De, Dubois Philippe, Ellingsen Kari E, Glover Adrian G, Griffiths Huw J, Gutt Julian, Halanych Kenneth M, Havermans Charlotte, Held Christoph, Janussen Dorte, Lörz Anne-Nina, Pearce David A, Pierrat Benjamin, Riehl Torben, Rose Armin, Sands Chester J, Soler-Membrives Anna, Schüller Myriam, Strugnell Jan M, Vanreusel Ann, Veit-Köhler Gritta, Wilson Nerida G, Yasuhara Moriaki, |
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Title |
Patterns, processes and vulnerability of Southern Ocean benthos: a decadal leap in knowledge and understanding
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Type |
Journal Article |
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Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar. Biol. |
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Volume |
160 |
Issue |
9 |
Pages |
2295-2317 |
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Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
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Abstract |
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Programme |
1044;1124 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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ISSN |
0025-3162 |
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Approved |
yes |
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Call Number |
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Serial |
4308 |
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Author |
Vaillant Maryline Le, Bohec Céline Le, Wienecke Barbara, Maho Yvon Le, Kato Akiko, Ropert-Coudert Yan, |
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Title |
How age and sex drive the foraging behaviour in the king penguin
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Type |
Journal Article |
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Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
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Volume |
160 |
Issue |
5 |
Pages |
1147-1156 |
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Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
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Abstract |
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Programme |
137 |
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Thesis |
Bachelor's thesis |
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ISSN |
0025-3162 |
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Approved |
yes |
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Call Number |
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Serial |
4464 |
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Author |
Chaigne Adrien, Authier Matthieu, Richard Pierre, Cherel Yves, Guinet Christophe, |
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Title |
Shift in foraging grounds and diet broadening during ontogeny in southern elephant seals from Kerguelen Islands
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Type |
Journal Article |
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Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar. Biol. |
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Volume |
160 |
Issue |
4 |
Pages |
977-986 |
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Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
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Abstract |
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Programme |
109 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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0025-3162 |
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yes |
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Call Number |
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Serial |
4402 |
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Author |
Giraldo Carolina, Mayzaud Patrick, Tavernier Eric, Irisson Jean-Olivier, Penot Florian, Becciu Jonathan, Chartier Amélie, Boutoute Marc, Koubbi Philippe, |
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Title |
Lipid components as a measure of nutritional condition in fish larvae (Pleuragramma antarcticum) in East Antarctica
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Type |
Journal Article |
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Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar Biol |
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Volume |
160 |
Issue |
4 |
Pages |
877-887 |
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Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
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Abstract |
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Programme |
1142 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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ISSN |
0025-3162 |
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Approved |
yes |
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Call Number |
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Serial |
4396 |
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Author |
Cottin Manuelle, Raymond Ben, Kato Akiko, Amélineau Françoise, Maho Yvon Le, Raclot Thierry, Galton-Fenzi Ben, Meijers Andrew, Ropert-Coudert Yan, |
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Title |
Foraging strategies of male Adélie penguins during their first incubation trip in relation to environmental conditions
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Type |
Journal Article |
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Year |
2012 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
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Volume |
159 |
Issue |
8 |
Pages |
1843-1852 |
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Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
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Abstract |
Knowledge of habitat use by top marine predators in response to environmental conditions is crucial in the current context of global changes occurring in the Southern Ocean. We examined the at-sea locations of male Ad,lie penguins (Pygoscelis adeliae) breeding at Dumont d'Urville during their first, long incubation trip. Compared with the chick-rearing period, penguins performed longer trips, going to oceanic waters as far as 320 km from the colony. We observed 3 strategies: (1) five individuals covered large distances to the north, targeting open-ocean areas and following the currents of two persistent eddies; (2) five individuals foraged to the north-west, close to the Antarctic shelf slope at the limit of the pack ice; and (3) three individuals covered much shorter distances (northwards or eastwards). The foraging range also seemed to be limited by the body condition of the penguins before their departure to sea. |
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Programme |
1091 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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ISSN |
0025-3162 |
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Approved |
yes |
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Call Number |
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Serial |
4285 |
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Author |
Connan Maëlle, Mayzaud Patrick, Duhamel Guy, Bonnevie Bo, Cherel Yves, |
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Title |
Fatty acid signature analysis documents the diet of five myctophid fish from the Southern Ocean
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Type |
Journal Article |
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Year |
2010 |
Publication |
Marine Biology |
Abbreviated Journal |
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Volume |
157 |
Issue |
10 |
Pages |
2303-2316 |
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Keywords |
Biomedical and Life Sciences, |
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Abstract |
Fatty acid (FA) and fatty alcohol (FAlc) compositions of both total lipid and neutral lipid fractions were studied for five myctophid species sampled in Kerguelen waters. Both qualitative and quantitative FA signature analyses were then performed to investigate their diet over longer time scales than the conventional stomach content analysis. Regarding their lipid class, FA and FAlc compositions, the five species could be discriminated into two groups: wax-ester-rich species ( Electrona antarctica , Krefftichthys anderssoni ) characterised by large amounts of monounsaturated FAs (>73% of total FAs) and triacylglycerol-rich species ( Electrona carlsbergi , Gymnoscopelus nicholsi , Protomyctophum bolini ) with major amounts of saturated and monounsaturated FAs (>29 and >46% of total FAs, respectively). Qualitative and quantitative FA analyses showed that K. anderssoni mainly preyed upon copepods, E. antarctica upon copepods and more euphausiids and P. bolini and E. carlsbergi mainly upon euphausiids with some copepods, while G. nicholsi had a more diverse diet. This study shows the usefulness of quantitative statistical analysis to determine the diet of Antarctic and sub-Antarctic predators and stresses the need of increasing the lipid and FA analyses of more zooplanktonic and micro-nektonic marine species. |
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Programme |
109 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Springer Berlin / Heidelberg |
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0025-3162 |
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Approved |
yes |
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Call Number |
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Serial |
2980 |
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Author |
Dommergue, A.; Bahlmann, E.; Ebinghaus, R.; Ferrari, C.; Boutron, C. |
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Title |
Laboratory simulation of Hg0 emissions from a snowpack |
Type |
Journal Article |
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Year |
2007 |
Publication |
Analytical and bioanalytical chemistry |
Abbreviated Journal |
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Volume |
388 |
Issue |
2 |
Pages |
319-327 |
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Abstract |
Abstract Snow surfaces play an important role in the biogeochemical cycle of mercury in high-latitude regions. Snowpacks act both as sources and sinks for gaseous compounds. Surprisingly, the roles of each environmental parameter that can govern the air–surface exchange over snow are not well understood owing to the lack of systematic studies. A laboratory system called the laboratory flux measurement system was used to study the emission of gaseous elemental mercury from a natural snowpack under controlled conditions. The first results from three snowpacks originating from alpine, urban and polar areas are presented. Consistent with observations in the field, we were able to reproduce gaseous mercury emissions and showed that they are mainly driven by solar radiation and especially UV-B radiation. From these laboratory experiments, we derived kinetic constants which show that divalent mercury can have a short natural lifetime of about 4–6 h in snow. |
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399 |
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Edition |
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ISSN |
1618-2642 |
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yes |
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Call Number |
IPEV @ Thierry.Lemaire @ |
Serial |
5610 |
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