Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island

Changes in mass and body composition, measured with labelled water, were used to quantify the energy expenditure during lactation and energy replenishment during the post-breeding aquatic phase in Southern elephant seal females at Stranger Point, King George Island. During lactation females spent a...

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Autor principal: Carlini, A.R
Otros Autores: Daneri, G.A, Márquez, M.E.I, Bornemann, H., Panarello, H., Casaux, R., Ramdohr, S., Plötz, J.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2005
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100 1 |a Carlini, A.R. 
245 1 0 |a Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island 
260 |c 2005 
270 1 0 |m Carlini, A.R.; Depto. de Ciencias Biológicas, Instituto Antártico Argentino, Cerrito 1248, C1010 AAZ Buenos Aires, Argentina; email: acarlini@dna.gov.ar 
506 |2 openaire  |e Política editorial 
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504 |a Daneri, G.A., Carlini, A.R., Fish prey of southern elephant seals, Mirounga leonina, at King George Island (2002) Polar Biol, 25, pp. 739-743 
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520 3 |a Changes in mass and body composition, measured with labelled water, were used to quantify the energy expenditure during lactation and energy replenishment during the post-breeding aquatic phase in Southern elephant seal females at Stranger Point, King George Island. During lactation females spent a mean of 6,021±1,365 MJ, which resulted in a loss of 35% of the initial mass, comprising 63% of initial body fat and 20% of initial body protein. During the 58±5.4 day post-breeding foraging period, females gained 135±39 Kg, which allowed them to recover an average of 55% of the mass, including 46% of the fat, 71% of the protein and 47% of the energy lost during lactation. Neither the mass nor the energy lost during lactation were related to those replenished while at sea. However, protein loss expressed in absolute terms or as a proportion of that present at the beginning of lactation explained about 50% of the variation in the protein gained during the post-breeding phase. This might indicate the presence of a mechanism favouring an increase in lean tissue during post-breeding. Daily energy requirements for an average sized female, during the post-breeding aquatic phase were estimated at 96 MJ. Estimation of prey consumption varies according to assumptions about diet composition. On a basis of 450 females, the total biomass of fish and squid consumed by the breeding group, assuming a diet composed of 75% cephalopods and 25% fish, was estimated to be 521 and 174 metric tonnes, respectively, for the period examined. © Springer-Verlag.  |l eng 
536 |a Detalles de la financiación: Secretaría de Ciencia y Técnica, Universidad de Buenos Aires, :11559 
536 |a Detalles de la financiación: Acknowledgements We want to thank S. Poljak, R. Conde, M. Alcalde, R. Montiel and G. Moreira for field assistance and S. Valencio and J.L.Nogueira for technical assistance. We thank Empresa Neuquina de Servicios de Ingeniería – Sociedad del Estado (ENSI), who provided the D2O to perform this study, and Holliday-Scott, who provided some of the anaesthetics used in this study. We also wish to thank two anonymous reviewers for their helpful comments on the manuscript. This work was funded by the Dirección Nacional del Antártico and the Secretaría de Ciencia y Técnica (Picto:11559). Our procedures conform to the Code of Ethics of Animal Experimentation in Antarctica. The permit for this work was granted by the Dirección Nacional del Antártico (Environmental Office), Argentina. 
593 |a Depto. de Ciencias Biológicas, Instituto Antártico Argentino, Cerrito 1248, C1010 AAZ Buenos Aires, Argentina 
593 |a División Mastozoología, Museo Argentino de Cs. Naturales B. Rivadavia, Av. Angel Gallardo 470, C1405 DJR Buenos Aires, Argentina 
593 |a Alfred - Wegener- Institut für Polar-und Meeresforschung, 27515 Bremerhaven, Germany 
593 |a Instituto de Geocronología Y Geología Isotópica (INGEIS), Pabellón INGEIS, Ciudad Universitaria, 1428 Buenos Aires, Argentina 
690 1 0 |a BODY CONDITION 
690 1 0 |a BODY MASS 
690 1 0 |a DIET 
690 1 0 |a FEEDING ECOLOGY 
690 1 0 |a FOOD CONSUMPTION 
690 1 0 |a FORAGING BEHAVIOR 
690 1 0 |a PINNIPED 
690 1 0 |a ANTARCTICA 
690 1 0 |a ARCTIC AND ANTARCTIC 
690 1 0 |a KING GEORGE ISLAND 
690 1 0 |a SOUTH SHETLAND ISLANDS 
690 1 0 |a WORLD 
690 1 0 |a CEPHALOPODA 
690 1 0 |a MIROUNGA LEONINA 
700 1 |a Daneri, G.A. 
700 1 |a Márquez, M.E.I. 
700 1 |a Bornemann, H. 
700 1 |a Panarello, H. 
700 1 |a Casaux, R. 
700 1 |a Ramdohr, S. 
700 1 |a Plötz, J. 
773 0 |d 2005  |g v. 28  |h pp. 769-775  |k n. 10  |p Polar Biol.  |x 07224060  |t Polar Biology 
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