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Abstract:

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.

Registro:

Documento: Artículo
Título:Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island
Autor:Carlini, A.R.; Daneri, G.A.; Márquez, M.E.I.; Bornemann, H.; Panarello, H.; Casaux, R.; Ramdohr, S.; Plötz, J.
Filiación:Depto. de Ciencias Biológicas, Instituto Antártico Argentino, Cerrito 1248, C1010 AAZ Buenos Aires, Argentina
División Mastozoología, Museo Argentino de Cs. Naturales B. Rivadavia, Av. Angel Gallardo 470, C1405 DJR Buenos Aires, Argentina
Alfred - Wegener- Institut für Polar-und Meeresforschung, 27515 Bremerhaven, Germany
Instituto de Geocronología Y Geología Isotópica (INGEIS), Pabellón INGEIS, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:body condition; body mass; diet; feeding ecology; food consumption; foraging behavior; pinniped; Antarctica; Arctic and Antarctic; King George Island; South Shetland Islands; World; Cephalopoda; Mirounga leonina
Año:2005
Volumen:28
Número:10
Página de inicio:769
Página de fin:775
DOI: http://dx.doi.org/10.1007/s00300-005-0004-6
Título revista:Polar Biology
Título revista abreviado:Polar Biol.
ISSN:07224060
CODEN:POBID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v28_n10_p769_Carlini

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Citas:

---------- APA ----------
Carlini, A.R., Daneri, G.A., Márquez, M.E.I., Bornemann, H., Panarello, H., Casaux, R., Ramdohr, S.,..., Plötz, J. (2005) . Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island. Polar Biology, 28(10), 769-775.
http://dx.doi.org/10.1007/s00300-005-0004-6
---------- CHICAGO ----------
Carlini, A.R., Daneri, G.A., Márquez, M.E.I., Bornemann, H., Panarello, H., Casaux, R., et al. "Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island" . Polar Biology 28, no. 10 (2005) : 769-775.
http://dx.doi.org/10.1007/s00300-005-0004-6
---------- MLA ----------
Carlini, A.R., Daneri, G.A., Márquez, M.E.I., Bornemann, H., Panarello, H., Casaux, R., et al. "Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island" . Polar Biology, vol. 28, no. 10, 2005, pp. 769-775.
http://dx.doi.org/10.1007/s00300-005-0004-6
---------- VANCOUVER ----------
Carlini, A.R., Daneri, G.A., Márquez, M.E.I., Bornemann, H., Panarello, H., Casaux, R., et al. Food consumption estimates of southern elephant seal females during their post-breeding aquatic phase at King George Island. Polar Biol. 2005;28(10):769-775.
http://dx.doi.org/10.1007/s00300-005-0004-6