Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1111/jfb.14863 http://hdl.handle.net/11449/222228 |
Resumo: | The objective of this study was to analyse the feeding habits and trophic interactions between four oceanic predatory fish around the Fernando de Noronha Archipelago (FNA), Brazil, in the western equatorial Atlantic (3.86°S/32.42°W), internationally recognized as an environment of high economic and ecological value. For this purpose, biological samples of yellowfin tuna (Thunnus albacares), wahoo (Acanthocybium solandri), barracuda (Sphyraena barracuda) and dolphinfish (Coryphaena hippurus) were collected for stomach content and stable isotope analysis. Values of the index of relative importance revealed varied diets, with a strong presence of teleost fishes (Diodontidae and Exocoetidae) for all species, with yellowfin tuna having a greater diversity of food items. Despite being generalists/opportunists, the feeding strategy of these predators showed a tendency towards a specialized diet in the use of the available resources around the FNA. They presented a narrow trophic niche width (Levin's index, Bi < 0.6) and low overlap between species, except between barracuda and wahoo (MacArthur and Levin's, R0 = 0.72). Isotopic compositions had broad values of δ13C and δ15N, and were significantly different between species. Our results provide information about the four species' trophic organization and suggest that the predators avoid competition by preying on different prey, thus allowing their coexistence. |
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Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlanticstable isotopestomach contenttrophic ecologytunaWestern equatorial AtlanticThe objective of this study was to analyse the feeding habits and trophic interactions between four oceanic predatory fish around the Fernando de Noronha Archipelago (FNA), Brazil, in the western equatorial Atlantic (3.86°S/32.42°W), internationally recognized as an environment of high economic and ecological value. For this purpose, biological samples of yellowfin tuna (Thunnus albacares), wahoo (Acanthocybium solandri), barracuda (Sphyraena barracuda) and dolphinfish (Coryphaena hippurus) were collected for stomach content and stable isotope analysis. Values of the index of relative importance revealed varied diets, with a strong presence of teleost fishes (Diodontidae and Exocoetidae) for all species, with yellowfin tuna having a greater diversity of food items. Despite being generalists/opportunists, the feeding strategy of these predators showed a tendency towards a specialized diet in the use of the available resources around the FNA. They presented a narrow trophic niche width (Levin's index, Bi < 0.6) and low overlap between species, except between barracuda and wahoo (MacArthur and Levin's, R0 = 0.72). Isotopic compositions had broad values of δ13C and δ15N, and were significantly different between species. Our results provide information about the four species' trophic organization and suggest that the predators avoid competition by preying on different prey, thus allowing their coexistence.Laboratório de Ecologia Marinha Universidade Federal Rural de PernambucoLaboratório de Estudos de Impactos Antrópicos na Biodiversidade Marinha e Estuarina Universidade Federal Rural de PernambucoLaboratório de Biologia e Conservação de Organismos Pelágicos Universidade Estadual Paulista Júlio de Mesquita FilhoInstitut de recherche pour le développement (IRD)Laboratório de Biologia e Conservação de Organismos Pelágicos Universidade Estadual Paulista Júlio de Mesquita FilhoUniversidade Federal Rural de PernambucoUniversidade Estadual Paulista (UNESP)Institut de recherche pour le développement (IRD)Martins, KarlaPelage, LatifaJustino, Anne K. S.Frédou, Flavia LucenaJúnior, Teodoro Vaske [UNESP]Le Loc'h, FrançoisTravassos, Paulo2022-04-28T19:43:30Z2022-04-28T19:43:30Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1111/jfb.14863Journal of Fish Biology.1095-86490022-1112http://hdl.handle.net/11449/22222810.1111/jfb.148632-s2.0-85112735390Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Fish Biologyinfo:eu-repo/semantics/openAccess2022-04-28T19:43:30Zoai:repositorio.unesp.br:11449/222228Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:43:30Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
title |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
spellingShingle |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic Martins, Karla stable isotope stomach content trophic ecology tuna Western equatorial Atlantic |
title_short |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
title_full |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
title_fullStr |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
title_full_unstemmed |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
title_sort |
Assessing trophic interactions between pelagic predatory fish by gut content and stable isotopes analysis around Fernando de Noronha Archipelago (Brazil), Equatorial West Atlantic |
author |
Martins, Karla |
author_facet |
Martins, Karla Pelage, Latifa Justino, Anne K. S. Frédou, Flavia Lucena Júnior, Teodoro Vaske [UNESP] Le Loc'h, François Travassos, Paulo |
author_role |
author |
author2 |
Pelage, Latifa Justino, Anne K. S. Frédou, Flavia Lucena Júnior, Teodoro Vaske [UNESP] Le Loc'h, François Travassos, Paulo |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal Rural de Pernambuco Universidade Estadual Paulista (UNESP) Institut de recherche pour le développement (IRD) |
dc.contributor.author.fl_str_mv |
Martins, Karla Pelage, Latifa Justino, Anne K. S. Frédou, Flavia Lucena Júnior, Teodoro Vaske [UNESP] Le Loc'h, François Travassos, Paulo |
dc.subject.por.fl_str_mv |
stable isotope stomach content trophic ecology tuna Western equatorial Atlantic |
topic |
stable isotope stomach content trophic ecology tuna Western equatorial Atlantic |
description |
The objective of this study was to analyse the feeding habits and trophic interactions between four oceanic predatory fish around the Fernando de Noronha Archipelago (FNA), Brazil, in the western equatorial Atlantic (3.86°S/32.42°W), internationally recognized as an environment of high economic and ecological value. For this purpose, biological samples of yellowfin tuna (Thunnus albacares), wahoo (Acanthocybium solandri), barracuda (Sphyraena barracuda) and dolphinfish (Coryphaena hippurus) were collected for stomach content and stable isotope analysis. Values of the index of relative importance revealed varied diets, with a strong presence of teleost fishes (Diodontidae and Exocoetidae) for all species, with yellowfin tuna having a greater diversity of food items. Despite being generalists/opportunists, the feeding strategy of these predators showed a tendency towards a specialized diet in the use of the available resources around the FNA. They presented a narrow trophic niche width (Levin's index, Bi < 0.6) and low overlap between species, except between barracuda and wahoo (MacArthur and Levin's, R0 = 0.72). Isotopic compositions had broad values of δ13C and δ15N, and were significantly different between species. Our results provide information about the four species' trophic organization and suggest that the predators avoid competition by preying on different prey, thus allowing their coexistence. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 2022-04-28T19:43:30Z 2022-04-28T19:43:30Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1111/jfb.14863 Journal of Fish Biology. 1095-8649 0022-1112 http://hdl.handle.net/11449/222228 10.1111/jfb.14863 2-s2.0-85112735390 |
url |
http://dx.doi.org/10.1111/jfb.14863 http://hdl.handle.net/11449/222228 |
identifier_str_mv |
Journal of Fish Biology. 1095-8649 0022-1112 10.1111/jfb.14863 2-s2.0-85112735390 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Fish Biology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803046905136021504 |