Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle

In central-place foragers the breeding cycle is often the period with the highest energy cost, where dietary and stored lipids play a key role. Lipids are mobilized through blood lipoproteins providing fuel to tissues. Thus, the use of food and endogenous resources with high-energy fats is important...

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Detalles Bibliográficos
Autores principales: Ibáñez, Andrés Esteban, Pasquevich, María Yanina, Machulsky, N. Fernandez, Berg, Gabriela, Heras, Horacio, Montalti, Diego, Grilli, M. Graña
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Biología
Zoología
Antarctic seabirds
Breeding energetic
Fatty acids
Lipid metabolism
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134987
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134987
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Biología
Zoología
Antarctic seabirds
Breeding energetic
Fatty acids
Lipid metabolism
spellingShingle Biología
Zoología
Antarctic seabirds
Breeding energetic
Fatty acids
Lipid metabolism
Ibáñez, Andrés Esteban
Pasquevich, María Yanina
Machulsky, N. Fernandez
Berg, Gabriela
Heras, Horacio
Montalti, Diego
Grilli, M. Graña
Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle
topic_facet Biología
Zoología
Antarctic seabirds
Breeding energetic
Fatty acids
Lipid metabolism
description In central-place foragers the breeding cycle is often the period with the highest energy cost, where dietary and stored lipids play a key role. Lipids are mobilized through blood lipoproteins providing fuel to tissues. Thus, the use of food and endogenous resources with high-energy fats is important to sustain individuals’ nutritional demands. To evaluate the physiological components associated to energetic demands and their variation regarding life history processes, we analysed the plasma circulating lipoprotein levels, the lipid classes and fatty acid (FA) composition in Brown Skua (Stercorarius antarcticus lonnbergi) in breeding stages with different energy requirements: incubation (In), early rearing (Er) and late rearing (Lr). We expected to find differences according to the energy demands of each stage and the sex. The level of Very Low Density lipoproteins was affected by the sex and the breeding stage, whereas Low Density lipoproteins only by the stage. Total plasma lipid content and circulating lipid classes were invariant among the stages studied; however, differences in total plasma FA and monounsaturated FA (oleic and nervonic) abundances were observed among stages. Besides, a decrease in the n-3:n-6 ratio was observed towards the Lr stage. The differences found in lipoproteins may be linked to changes in the energy demands throughout the breeding period. Moreover, the variation observed in FA abundance and n-3:n-6 ratio may be related to a preferential mobilization of FA from stores as fuel or, possibly, to a differential use of the available food resources.
format Articulo
Articulo
author Ibáñez, Andrés Esteban
Pasquevich, María Yanina
Machulsky, N. Fernandez
Berg, Gabriela
Heras, Horacio
Montalti, Diego
Grilli, M. Graña
author_facet Ibáñez, Andrés Esteban
Pasquevich, María Yanina
Machulsky, N. Fernandez
Berg, Gabriela
Heras, Horacio
Montalti, Diego
Grilli, M. Graña
author_sort Ibáñez, Andrés Esteban
title Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle
title_short Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle
title_full Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle
title_fullStr Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle
title_full_unstemmed Dynamics of circulating lipoproteins and lipids in Brown Skua (Stercorarius antarcticus lonnbergi) during the breeding cycle
title_sort dynamics of circulating lipoproteins and lipids in brown skua (stercorarius antarcticus lonnbergi) during the breeding cycle
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/134987
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