Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure

Here, we analyse changes throughout time in the isotopic niche of the Franciscana dolphin (Pontoporia blainvillei), the South American fur seal (Arctocephalus australis) and the South American sea lion(Otaria flavescens) from the Río de la Plata estuary and adjacent Atlantic Ocean to test the hypoth...

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Autores: Drago, Massimiliano, Franco Trecu, Valentina, Segura, Angel M., Valdivia, Meica, González, Enrique M., Aguilar, Àlex, Cardona Pascual, Luis
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/129425
Acceso en línea:https://hdl.handle.net/2445/129425
Access Level:acceso abierto
Palabra clave:Pesca
Isòtops estables en ecologia
Mamífers marins
Ecosistemes
Fishing
Stable isotopes in ecological research
Marine mammals
Biotic communities
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spelling Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structureDrago, MassimilianoFranco Trecu, ValentinaSegura, Angel M.Valdivia, MeicaGonzález, Enrique M.Aguilar, ÀlexCardona Pascual, LuisPescaIsòtops estables en ecologiaMamífers marinsEcosistemesFishingStable isotopes in ecological researchMarine mammalsBiotic communitiesHere, we analyse changes throughout time in the isotopic niche of the Franciscana dolphin (Pontoporia blainvillei), the South American fur seal (Arctocephalus australis) and the South American sea lion(Otaria flavescens) from the Río de la Plata estuary and adjacent Atlantic Ocean to test the hypothesis that fishing may modify the diet of small-gape predators by reducing the average size of prey. The overall evidence, from stable isotope and stomach contents analyses, reveals major changes in resource partitioning between the three predators considered, mainly because of an increased access of Franciscana dolphins to juvenile demersal fishes. These results are consistent with the changes in the length distribution of demersal fish species resulting from fishing and suggest that Franciscana dolphin has been the most benefited species of the three marine mammal species considered because of its intermediate mouth gape. In conclusion, the impact of fishing on marine mammals goes beyond the simple reduction in prey biomass and is highly dependent on the mouth gape of the species involved.Nature Publishing Group2019201920182019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/2445/129425Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1038/s41598-018-34100-8Scientific Reports, 2018, vol. 8, num. 15759https://doi.org/10.1038/s41598-018-34100-8cc-by (c) Drago, Massimiliano et al., 2018http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1294252026-05-29T05:05:01Z
dc.title.none.fl_str_mv Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
title Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
spellingShingle Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
Drago, Massimiliano
Pesca
Isòtops estables en ecologia
Mamífers marins
Ecosistemes
Fishing
Stable isotopes in ecological research
Marine mammals
Biotic communities
title_short Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
title_full Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
title_fullStr Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
title_full_unstemmed Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
title_sort Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
dc.creator.none.fl_str_mv Drago, Massimiliano
Franco Trecu, Valentina
Segura, Angel M.
Valdivia, Meica
González, Enrique M.
Aguilar, Àlex
Cardona Pascual, Luis
author Drago, Massimiliano
author_facet Drago, Massimiliano
Franco Trecu, Valentina
Segura, Angel M.
Valdivia, Meica
González, Enrique M.
Aguilar, Àlex
Cardona Pascual, Luis
author_role author
author2 Franco Trecu, Valentina
Segura, Angel M.
Valdivia, Meica
González, Enrique M.
Aguilar, Àlex
Cardona Pascual, Luis
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Pesca
Isòtops estables en ecologia
Mamífers marins
Ecosistemes
Fishing
Stable isotopes in ecological research
Marine mammals
Biotic communities
topic Pesca
Isòtops estables en ecologia
Mamífers marins
Ecosistemes
Fishing
Stable isotopes in ecological research
Marine mammals
Biotic communities
description Here, we analyse changes throughout time in the isotopic niche of the Franciscana dolphin (Pontoporia blainvillei), the South American fur seal (Arctocephalus australis) and the South American sea lion(Otaria flavescens) from the Río de la Plata estuary and adjacent Atlantic Ocean to test the hypothesis that fishing may modify the diet of small-gape predators by reducing the average size of prey. The overall evidence, from stable isotope and stomach contents analyses, reveals major changes in resource partitioning between the three predators considered, mainly because of an increased access of Franciscana dolphins to juvenile demersal fishes. These results are consistent with the changes in the length distribution of demersal fish species resulting from fishing and suggest that Franciscana dolphin has been the most benefited species of the three marine mammal species considered because of its intermediate mouth gape. In conclusion, the impact of fishing on marine mammals goes beyond the simple reduction in prey biomass and is highly dependent on the mouth gape of the species involved.
publishDate 2018
dc.date.none.fl_str_mv 2018
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/129425
url https://hdl.handle.net/2445/129425
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1038/s41598-018-34100-8
Scientific Reports, 2018, vol. 8, num. 15759
https://doi.org/10.1038/s41598-018-34100-8
dc.rights.none.fl_str_mv cc-by (c) Drago, Massimiliano et al., 2018
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Drago, Massimiliano et al., 2018
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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