Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Oceanography |
Texto Completo: | https://www.revistas.usp.br/bjoce/article/view/140402 |
Resumo: | The feeding ecology of the beach silverside (Atherinella blackburni) in the surf zone of a tropical sand beach, located in the southeastern Brazil, was accessed through the gut content analysis of 198 fish. Factors such as fish's size, season and day period were analysed to understand how these variables affect the diet composition of the species. Results show that A. blackburni is a coastal neritic fish with a broad feeding niche. Most recurrent prey were zooplanktonic crustaceans, insects and benthic molluscs, in which Copepoda crustaceans were the dominant dietary item in occurrence and abundance. A. blackburni appears to have a slight ontogenetic shift in its diet, changing from benthic molluscs to crustaceans and insects along its life cycle. The diel activity also reveals to be an important factor to the A. blackburni feeding ecology. The predominant occurrence of small fish during the morning, along with the main preys for this size class, suggests that small individuals use shallower waters as feeding grounds during the morning and, during the night, they move to deeper waters for protection against predators. |
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Brazilian Journal of Oceanography |
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Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern BrazilDiel activityDietOntogenetic shiftResources partitioningSurf zoneZooplanktivorousAtividade diáriaDietaMudança ontogênicaPartição de recursosZona de arrebentaçãoZooplanctívoro The feeding ecology of the beach silverside (Atherinella blackburni) in the surf zone of a tropical sand beach, located in the southeastern Brazil, was accessed through the gut content analysis of 198 fish. Factors such as fish's size, season and day period were analysed to understand how these variables affect the diet composition of the species. Results show that A. blackburni is a coastal neritic fish with a broad feeding niche. Most recurrent prey were zooplanktonic crustaceans, insects and benthic molluscs, in which Copepoda crustaceans were the dominant dietary item in occurrence and abundance. A. blackburni appears to have a slight ontogenetic shift in its diet, changing from benthic molluscs to crustaceans and insects along its life cycle. The diel activity also reveals to be an important factor to the A. blackburni feeding ecology. The predominant occurrence of small fish during the morning, along with the main preys for this size class, suggests that small individuals use shallower waters as feeding grounds during the morning and, during the night, they move to deeper waters for protection against predators. A ecologia alimentar do peixe-rei (Atherinella blackburni) na zona de arrebentação de uma praia arenosa tropical, localizada no sudeste do Brasil, foi acessada a partir da análise do conteúdo alimentar de 198 peixes. Fatores como o tamanho, a estação do ano e o período do dia foram analisados para compreender como estes influenciam a dieta da espécie. Os resultados mostram que A. blackburni é um peixe nerítico costeiro com amplo nicho alimentar. As presas mais recorrentes foram os crustáceos zooplanctônicos, insetos e moluscos bentônicos, sendo os crustáceos da subclasse Copepoda o item dominante na dieta em ocorrência e abundância. A. blackburni aparenta possuir uma leve mudança ontogênica em sua dieta, variando de moluscos bentônicos para crustáceos e em seguida para insetos ao longo do seu ciclo de vida. A atividade diária também demonstrou ser um fator importante para a ecologia alimentar de A. blackburni. O predomínio de peixes pequenos durante o período da manhã, juntamente com as principais presas para esta classe de tamanho, sugere que indivíduos pequenos utilizem as áreas mais rasas para alimentação durante o período da manhã e, durante a noite, movem-se para águas mais profundas em busca de proteção contra predadores.Universidade de São Paulo. Instituto Oceanográfico2017-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/bjoce/article/view/14040210.1590/s1679-87592017131506503Brazilian Journal of Oceanography; v. 65 n. 3 (2017); 346-355Brazilian Journal of Oceanography; Vol. 65 No. 3 (2017); 346-355Brazilian Journal of Oceanography; Vol. 65 Núm. 3 (2017); 346-3551982-436X1679-8759reponame:Brazilian Journal of Oceanographyinstname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/bjoce/article/view/140402/135450Copyright (c) 2017 Brazilian Journal of Oceanographyinfo:eu-repo/semantics/openAccessGonzalez, Júlio GuazzelliVaske Júnior, Teodoro2017-11-06T15:29:22Zoai:revistas.usp.br:article/140402Revistahttps://www.revistas.usp.br/bjoce/indexPUBhttps://www.revistas.usp.br/bjoce/oaiio@usp.br||io@usp.br1982-436X1679-8759opendoar:2017-11-06T15:29:22Brazilian Journal of Oceanography - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
title |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
spellingShingle |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil Gonzalez, Júlio Guazzelli Diel activity Diet Ontogenetic shift Resources partitioning Surf zone Zooplanktivorous Atividade diária Dieta Mudança ontogênica Partição de recursos Zona de arrebentação Zooplanctívoro |
title_short |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
title_full |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
title_fullStr |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
title_full_unstemmed |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
title_sort |
Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil |
author |
Gonzalez, Júlio Guazzelli |
author_facet |
Gonzalez, Júlio Guazzelli Vaske Júnior, Teodoro |
author_role |
author |
author2 |
Vaske Júnior, Teodoro |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Gonzalez, Júlio Guazzelli Vaske Júnior, Teodoro |
dc.subject.por.fl_str_mv |
Diel activity Diet Ontogenetic shift Resources partitioning Surf zone Zooplanktivorous Atividade diária Dieta Mudança ontogênica Partição de recursos Zona de arrebentação Zooplanctívoro |
topic |
Diel activity Diet Ontogenetic shift Resources partitioning Surf zone Zooplanktivorous Atividade diária Dieta Mudança ontogênica Partição de recursos Zona de arrebentação Zooplanctívoro |
description |
The feeding ecology of the beach silverside (Atherinella blackburni) in the surf zone of a tropical sand beach, located in the southeastern Brazil, was accessed through the gut content analysis of 198 fish. Factors such as fish's size, season and day period were analysed to understand how these variables affect the diet composition of the species. Results show that A. blackburni is a coastal neritic fish with a broad feeding niche. Most recurrent prey were zooplanktonic crustaceans, insects and benthic molluscs, in which Copepoda crustaceans were the dominant dietary item in occurrence and abundance. A. blackburni appears to have a slight ontogenetic shift in its diet, changing from benthic molluscs to crustaceans and insects along its life cycle. The diel activity also reveals to be an important factor to the A. blackburni feeding ecology. The predominant occurrence of small fish during the morning, along with the main preys for this size class, suggests that small individuals use shallower waters as feeding grounds during the morning and, during the night, they move to deeper waters for protection against predators. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/bjoce/article/view/140402 10.1590/s1679-87592017131506503 |
url |
https://www.revistas.usp.br/bjoce/article/view/140402 |
identifier_str_mv |
10.1590/s1679-87592017131506503 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/bjoce/article/view/140402/135450 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2017 Brazilian Journal of Oceanography info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2017 Brazilian Journal of Oceanography |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto Oceanográfico |
publisher.none.fl_str_mv |
Universidade de São Paulo. Instituto Oceanográfico |
dc.source.none.fl_str_mv |
Brazilian Journal of Oceanography; v. 65 n. 3 (2017); 346-355 Brazilian Journal of Oceanography; Vol. 65 No. 3 (2017); 346-355 Brazilian Journal of Oceanography; Vol. 65 Núm. 3 (2017); 346-355 1982-436X 1679-8759 reponame:Brazilian Journal of Oceanography instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Brazilian Journal of Oceanography |
collection |
Brazilian Journal of Oceanography |
repository.name.fl_str_mv |
Brazilian Journal of Oceanography - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
io@usp.br||io@usp.br |
_version_ |
1787713798628442112 |