Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers

Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers

Trabajo final presentado por Sílvia Puigarnau Benítez para el Máster en Biodiversidad de la Universitat de Barcelona (UB), realizado bajo la dirección del Dr. Joan Navarro, el Dr. Joan Giménez, y la Dra. Marta Coll del Institut de Ciències del Mar (ICM-CSIC) y de la Dra. Ana Sotomayor García.-- 15 pages, 7 figures, 6 tables

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Main Author: Puigarnau Benitez, Silvia
Other Authors: Navarro, Joan
Format: tesis de maestría biblioteca
Published: Universidad de Barcelona 2019-09-13
Online Access:http://hdl.handle.net/10261/203923
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spelling dig-icm-es-10261-2039232022-05-26T11:13:45Z Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers Puigarnau Benitez, Silvia Navarro, Joan Giménez, Joan Coll, Marta Ministerio de Ciencia, Innovación y Universidades (España) Trabajo final presentado por Sílvia Puigarnau Benítez para el Máster en Biodiversidad de la Universitat de Barcelona (UB), realizado bajo la dirección del Dr. Joan Navarro, el Dr. Joan Giménez, y la Dra. Marta Coll del Institut de Ciències del Mar (ICM-CSIC) y de la Dra. Ana Sotomayor García.-- 15 pages, 7 figures, 6 tables Predator-prey relationships are key for the balance of marine ecosystems but these relationships can be altered due to overfishing and climate change effects. This study explores the effect of overfishing of small pelagic fish in the diet of a pelagic predator, the little tunny (Euthynnus alletteratus), in the western Mediterranean Sea during the years 2012, and 2014-2017. We combined analyses of stomach contents and stable isotopic values. Results confirmed that the diet of little tunny was basically composed by small pelagic fish, mainly anchovy, Engraulis encrasicolus, and sardine, Sardina pilchardus. Some changes in the diet of this species were found, with different importance of demersal fish among years. These changes coincide with a decline of the importance of clupeiformes, mainly sardine, in the diet of little tunny. Changes on prey occurrence in the diet of little tunny may reflect the overfished status of small pelagic fish in the Northwestern Mediterranean Sea This work is a contribution to the Spanish Government PELWEB project (ES-PN-2017-CTM 2017-88939-R) and to the RyC (RYC-2015-17809) contract of J. Navarro 2020-03-13T13:12:22Z 2020-03-13T13:12:22Z 2019-09-13 2020-03-13T13:12:23Z tesis de maestría http://purl.org/coar/resource_type/c_bdcc http://hdl.handle.net/10261/203923 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/ES-PN-2017CTM-2017-88939-R Sí open Universidad de Barcelona CSIC - Instituto de Ciencias del Mar (ICM)
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
description Trabajo final presentado por Sílvia Puigarnau Benítez para el Máster en Biodiversidad de la Universitat de Barcelona (UB), realizado bajo la dirección del Dr. Joan Navarro, el Dr. Joan Giménez, y la Dra. Marta Coll del Institut de Ciències del Mar (ICM-CSIC) y de la Dra. Ana Sotomayor García.-- 15 pages, 7 figures, 6 tables
author2 Navarro, Joan
author_facet Navarro, Joan
Puigarnau Benitez, Silvia
format tesis de maestría
author Puigarnau Benitez, Silvia
spellingShingle Puigarnau Benitez, Silvia
Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers
author_sort Puigarnau Benitez, Silvia
title Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers
title_short Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers
title_full Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers
title_fullStr Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers
title_full_unstemmed Temporal changes in the diet of little tunny (Euthynnus alletteratus) from the northwestern Mediterranean Sea: combining stomach content and isotopic markers
title_sort temporal changes in the diet of little tunny (euthynnus alletteratus) from the northwestern mediterranean sea: combining stomach content and isotopic markers
publisher Universidad de Barcelona
publishDate 2019-09-13
url http://hdl.handle.net/10261/203923
work_keys_str_mv AT puigarnaubenitezsilvia temporalchangesinthedietoflittletunnyeuthynnusalletteratusfromthenorthwesternmediterraneanseacombiningstomachcontentandisotopicmarkers
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