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Author |
Vacquié-Garcia Jade, Guinet Christophe, Dragon Anne-Cécile, Viviant Morgane, El Ksabi Nory, Bailleul Frédéric |
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Title |
Predicting prey capture rates of southern elephant seals from track and dive parameters |
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Journal Article |
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Year |
2015 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal  |
Mar. Ecol. Prog. Ser. |
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Volume |
541 |
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In the marine environment, track and dive parameter data (obtained using Argos or GPS tags and time?depth recorders) are commonly used to provide proxies for foraging behaviour of marine predators. However, their accuracy is rarely assessed. Recently, the addition of head-mounted accelerometers has allowed for detection of prey capture attempts (PCAs) at sea, allowing for more accurate estimations of foraging behaviour. Despite increased numbers of such devices being deployed, their use is still marginal compared with other tools which measure track and dive parameters. The objectives of our study were (1) to identify the most relevant combination of tracking and diving metrics in predicting the frequency of PCAs in female southern elephant seals <i>Mirounga leonina</i> from the Kerguelen Islands, and (2) to apply it to a broader range of individuals for which only tracking and diving data were available. The results of our models were consistent with the optimal foraging theory as well as the optimal diving theory. The model with the best predictive performance was the one that combined both tracking and diving information. However, most of the variability in the number of PCAs could be solely explained by changes in the diving behaviour of seals. Finally, we used the best predictive model on 20 individuals, which had not been fitted with accelerometers, to determine their main foraging zones. The behavioural indicators established in this study constitute a useful ecological tool for population monitoring and conservation purposes. |
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0171-8630 |
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yes |
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6310 |
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Author |
Falk-Petersen Stig, Mayzaud Patrick, Kattner Gerhard, Sargent John, |
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Title |
Lipids and life strategy of Arctic Calanus
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Journal Article |
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Year |
2009 |
Publication |
Marine Biology Research |
Abbreviated Journal |
Mar. Biol. Res. |
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Volume |
5 |
Issue |
1 |
Pages |
18 -39 |
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Keywords |
Arctic, BARENTS-SEA, Calanus, EGG-PRODUCTION, fatty acids, FRAM STRAIT, GREENLAND SEA, HERBIVOROUS COPEPODS, life strategy, lipids, MARGINAL ICE-ZONE, NORTH-ATLANTIC, trophic markers, VERTICAL-DISTRIBUTION, WAX ESTERS, WEST GREENLAND, |
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Abstract |
The three Arctic Calanus species, C. finmarchicus (Gunnerus, 1765), C. glacialis (Jaschov, 1955), and C. hyperboreus, are the most important herbivores in Arctic seas in terms of species biomass. They play a key role in the lipid-based energy flux in the Arctic, converting low-energy carbohydrates and proteins in ice algae and phytoplankton into high-energy wax esters. In this paper we review the over-wintering strategy, seasonal migration, stage development, life span, feeding strategy, body size, lipid biochemistry and the geographic distribution of the three dominant Calanus species in Arctic waters. We then relate these parameters to other biotic and abiotic factors, such as the timing of the Arctic phytoplankton and ice algae bloom, sea ice cover and climate variability. We also present new data on fatty acid and fatty alcohol content in the three Calanus species in addition to reviewing the available literature on these topics. These data are analysed for species homogeneity and geographic grouping. The dominance of diatom fatty acid trophic markers in the lipids of Calanus underpins the importance of diatoms as Arctic primary producers, even if dinoflagellates and Phaeocystis pouchetii can also be important food sources for the calanoid copepods. We conclude that the Arctic Calanus species are herbivores, engineered to feed on the Arctic bloom, and that the timing of the bloom is the most important factor in determining the life strategies of the individual species.
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455 |
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TAYLOR & FRANCIS AS |
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1731 |
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Miramand P. & Bentley D. |
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Concentration and distribution of heavy metals in tissues of two cephalopods, Eledone cirrhosa and Sepia officinalis from the French Coast of the English channel. |
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Journal Article |
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Year |
1992 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
114 |
Issue |
3 |
Pages |
349-353 |
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280 |
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0025-3162 |
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yes |
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100 |
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Author |
Raclot T., Groscolas R. & Cherel Y. |
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Title |
Fatty acid evidence for the importance of myctophid fishes in diet of king penguins, Aptenodytes patagonicus. |
Type |
Journal Article |
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Year |
1998 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
132 |
Issue |
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Pages |
523-533 |
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137 |
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0025-3162 |
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yes |
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562 |
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Author |
Charrassin J.B., Le Maho Y. & Bost C.B. |
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Title |
Seasonal changes in the diving parameters of king penguins (Aptenodytes patagonicus). |
Type |
Journal Article |
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Year |
2002 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
141 |
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Pages |
581-589 |
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137;394 |
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0025-3162 |
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yes |
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Serial |
811 |
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Author |
Ropert Coudert Y., Baudat J., Kurita M., Bost C.A., Kato A., Le Maho Y. & Naito Y. |
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Journal Article |
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Year |
2000 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
137 |
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1105-1110 |
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137;394 |
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0025-3162 |
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yes |
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Serial |
1056 |
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Author |
Cherel Y. & Kooyman G.L. |
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Title |
Food of emperor penguins(Aptenodytes forsteri)in the western Ross Sea, Antarctica. |
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Journal Article |
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Year |
1998 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
130 |
Issue |
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Pages |
335-344 |
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109 |
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0025-3162 |
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1203 |
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Author |
Wilson R.P., Peters G., Regel J., Cremillet D., Putz K., Kierspiel M., Weimerskirch H. & Coopre J. |
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Title |
Short retention times in stomach temperature loggers in free ranging seabirds: is there hope in the spring? |
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Journal Article |
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Year |
1998 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
130 |
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Pages |
559-566 |
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109 |
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0025-3162 |
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yes |
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1405 |
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Author |
Cherel Y., Tremblay Y., Guinard E. & Georges J.Y. |
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Title |
Diving behaviour of female northern rockhopper penguins, Eudyptes chrysocome moseleyi, during the brooding period at Amsterdam Island (Southern Indian Ocean). |
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Journal Article |
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Year |
1999 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
134 |
Issue |
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Pages |
375-385 |
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109 |
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0025-3162 |
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1670 |
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Author |
Cherel Y., Ridoux V. & Rodhouse P.G. |
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Title |
Fish and squid in the diet of king penguin chicks, Aptenodytes patagonicus, during winter at sub-antarctic Crozet Islands. |
Type |
Journal Article |
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Year |
1996 |
Publication |
Marine biology |
Abbreviated Journal |
Mar. Biol. |
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Volume |
126 |
Issue |
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Pages |
559-570 |
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109 |
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0025-3162 |
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1783 |
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