Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México

Abstract: Carcharodon carcharias is a protected species occupying the apex of most marine foodwebs where they are present. Aggregation areas, such as Guadalupe Island, México, that have been related to feeding events, are of special interest for this species conservation. The aim of this study was t...

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Autores principales:	Alderete-Macal,María José, Caraveo-Patiño,Javier, Hoyos-Padilla,Edgar Mauricio
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2020
Materias:	Carcharodon carcharias fatty acids muscle biomarkers Guadalupe Island
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572020000100037
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spelling	oai:scielo:S0718-195720200001000372020-09-11Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, MéxicoAlderete-Macal,María JoséCaraveo-Patiño,JavierHoyos-Padilla,Edgar Mauricio Carcharodon carcharias fatty acids muscle biomarkers Guadalupe Island Abstract: Carcharodon carcharias is a protected species occupying the apex of most marine foodwebs where they are present. Aggregation areas, such as Guadalupe Island, México, that have been related to feeding events, are of special interest for this species conservation. The aim of this study was to describe the fatty acid profile of C. carcharias' muscle for the first time on Guadalupe Island, using non-lethal biopsy methods to determine ontogenetic and sex differences in relation to diet and habitat use. Fatty acid profiles and biomarkers from different individuals are explored as a source of integrated information of their diet. Analysis of the fatty acid composition of individuals with varying total lengths (2.3-5.0 m) suggested a dietary shift between juveniles and adults occurring at aproximately 3 m. Fatty acid biomarkers indicated a higher degree of carnivorism in adults than in juveniles. Additionally, these ecological tracers suggested that juveniles feed in shallow waters close to the coast, while adults feed in deep waters along inshore and offshore areas. This study represents a first step towards using fatty acid composition as a relevant tool for further understanding dietary shifts and habitat use throughout the ontogeny of C. carcharias. However, to corroborate this, further studies with larger sample sizes are required.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.55 n.1 20202020-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572020000100037en10.22370/rbmo.2020.55.1.2372
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Carcharodon carcharias fatty acids muscle biomarkers Guadalupe Island
spellingShingle	Carcharodon carcharias fatty acids muscle biomarkers Guadalupe Island Alderete-Macal,María José Caraveo-Patiño,Javier Hoyos-Padilla,Edgar Mauricio Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México
description	Abstract: Carcharodon carcharias is a protected species occupying the apex of most marine foodwebs where they are present. Aggregation areas, such as Guadalupe Island, México, that have been related to feeding events, are of special interest for this species conservation. The aim of this study was to describe the fatty acid profile of C. carcharias' muscle for the first time on Guadalupe Island, using non-lethal biopsy methods to determine ontogenetic and sex differences in relation to diet and habitat use. Fatty acid profiles and biomarkers from different individuals are explored as a source of integrated information of their diet. Analysis of the fatty acid composition of individuals with varying total lengths (2.3-5.0 m) suggested a dietary shift between juveniles and adults occurring at aproximately 3 m. Fatty acid biomarkers indicated a higher degree of carnivorism in adults than in juveniles. Additionally, these ecological tracers suggested that juveniles feed in shallow waters close to the coast, while adults feed in deep waters along inshore and offshore areas. This study represents a first step towards using fatty acid composition as a relevant tool for further understanding dietary shifts and habitat use throughout the ontogeny of C. carcharias. However, to corroborate this, further studies with larger sample sizes are required.
author	Alderete-Macal,María José Caraveo-Patiño,Javier Hoyos-Padilla,Edgar Mauricio
author_facet	Alderete-Macal,María José Caraveo-Patiño,Javier Hoyos-Padilla,Edgar Mauricio
author_sort	Alderete-Macal,María José
title	Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México
title_short	Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México
title_full	Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México
title_fullStr	Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México
title_full_unstemmed	Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México
title_sort	ontogenetic differences in muscle fatty acid profile of white sharks carcharodon carcharias off guadalupe island, méxico
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572020000100037
work_keys_str_mv	AT alderetemacalmariajose ontogeneticdifferencesinmusclefattyacidprofileofwhitesharkscarcharodoncarchariasoffguadalupeislandmexico AT caraveopatinojavier ontogeneticdifferencesinmusclefattyacidprofileofwhitesharkscarcharodoncarchariasoffguadalupeislandmexico AT hoyospadillaedgarmauricio ontogeneticdifferencesinmusclefattyacidprofileofwhitesharkscarcharodoncarchariasoffguadalupeislandmexico
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Ontogenetic differences in muscle fatty acid profile of white sharks Carcharodon carcharias off Guadalupe Island, México

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