Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets

Blubber fatty acid(s) (FA) signatures can provide accurate estimates of predator diets using quantitative FA signature analysis, provided that aspects of predator FA metabolism are taken into account. Because the intestinal absorption of dietary FA and their incorporation into chylomicrons (the prim...

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Autores principales: Cooper, Margaret H., Iverson, Sara J., Heras, Horacio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Bioquímica
Ciencias Médicas
Fatty acids
Chylomicrons
Pinnipeds
Diet
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/133931
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-133931
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Bioquímica
Ciencias Médicas
Fatty acids
Chylomicrons
Pinnipeds
Diet
spellingShingle Bioquímica
Ciencias Médicas
Fatty acids
Chylomicrons
Pinnipeds
Diet
Cooper, Margaret H.
Iverson, Sara J.
Heras, Horacio
Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets
topic_facet Bioquímica
Ciencias Médicas
Fatty acids
Chylomicrons
Pinnipeds
Diet
description Blubber fatty acid(s) (FA) signatures can provide accurate estimates of predator diets using quantitative FA signature analysis, provided that aspects of predator FA metabolism are taken into account. Because the intestinal absorption of dietary FA and their incorporation into chylomicrons (the primary transport lipoproteins for dietary FA in the blood) may influence the relationship between FA composition in the diet and adipose tissue, we investigated the metabolism of individual FA at these early stages of assimilation. We also investigated the capacity of chylomicron signatures to provide quantitative estimates of prey composition of an experimental meal. Six captive juvenile grey seals (Halichoerus grypus) were fed either 2.3 kg (n = 3) or 4.6 kg (n = 3) of Atlantic herring (Clupea harengus). Although chylomicron FA signatures resembled diet signatures at all samplings, absolute differences were smallest at 3-h post-feeding, when chylomicrons were likely largest and had the greatest ratio of triacylglycerol to phospholipid FA. Specific FA that differed significantly between diet and chylomicron signatures reflected either input from endogenous sources or loss through peroxisomal beta-oxidation. When these aspects of metabolism were accounted for, the quantitative predictions of diet composition generated using chylomicron signatures were extremely accurate, even when tested against 28 other prey items.
format Articulo
Articulo
author Cooper, Margaret H.
Iverson, Sara J.
Heras, Horacio
author_facet Cooper, Margaret H.
Iverson, Sara J.
Heras, Horacio
author_sort Cooper, Margaret H.
title Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets
title_short Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets
title_full Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets
title_fullStr Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets
title_full_unstemmed Dynamics of blood chylomicron fatty acids in a marine carnivore : Implications for lipid metabolism and quantitative estimation of predator diets
title_sort dynamics of blood chylomicron fatty acids in a marine carnivore : implications for lipid metabolism and quantitative estimation of predator diets
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/133931
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AT herashoracio dynamicsofbloodchylomicronfattyacidsinamarinecarnivoreimplicationsforlipidmetabolismandquantitativeestimationofpredatordiets
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