Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil

Detalhes bibliográficos
Autor(a) principal: Pasquino, Aline F.
Data de Publicação: 2011
Outros Autores: Vaske-Júnior, Teodoro, Gadig, Otto B. F., Barreiros, João P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.3/1575
Resumo: Copyright © 2011 Société Française d’Ichtyologie.
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spelling Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern BrazilNotes sur les habitudes alimentaires de Rioraja agassizi (Chondrichthyes, Rajidae) dans le sud du Brésil.RajidaeElasmobranchRioraja agassiziSW AtlanticTrophic EcologyCopyright © 2011 Société Française d’Ichtyologie.Feeding habits of the skate Rioraja agassizi were analyzed in southeastern Brazil from samples obtained along São Paulo coast. A total of 258 specimens were examined, ranging between 96 and 532 mm total length. About 57.85% were females and 42.15% were males, resulting in a 1:1.37 sex-ratio to females. From 223 stomachs collected (94 males and 129 females) empty stomachs represented only 1.4%. Nine prey categories were identified: Polychaeta, Copepoda, Cumacea, Isopoda, Gammaridea, Dendrobranchiata, Brachyura, Teleostei, and one non-animal category (nonidentifiable items). Crustaceans were the most important item, indicating that the species has a carcinophagic preference. The presence of fish was just verified in juveniles and some adult individuals, with predominance in summer. Sex, maturity stage and seasonality did not influence the feeding habits of the species.RÉSUMÉ: Les habitudes alimentaires de Rioraja agassizi on été analysées dans le sud-ouest du Brésil, tout au long de la côte de l’État de São Paulo. Au total, 258 exemplaires ont été examinés, leurs tailles variant entre 96 et 532 mm de longueur totale. Les femelles ont représenté 57,85% de l’échantillon, conduisant à un sex-ratio secondaire de 1 : 1,37 en leur faveur. Sur 223 estomacs recueillis (94 mâles et 129 femelles) ceux qui étaient vides représentaient seulement 1,4%. Neuf catégories de proies ont été identifiées: Polychaeta, Copepoda, Cumacea, Isopoda, Gammaridea, Dendrobranchiata, Brachyura, Teleostei, et des restes inorganiques (items non identifiables). Les crustacés sont la proie la plus importante, indiquant une préférence carcinophage pour cette espèce. La présence de poissons a été vérifiée seulement dans les estomacs de juvéniles avec une prédominance durant les mois d’été. Aucune influence des variables “sexe”, “maturité” et “saison” sur les habitudes alimentaires n’a été détectée.Société Française d’IchtyologieRepositório da Universidade dos AçoresPasquino, Aline F.Vaske-Júnior, TeodoroGadig, Otto B. F.Barreiros, João P.2013-01-22T13:18:09Z2011-06-302013-01-16T03:27:12Z2011-06-30T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.3/1575engPasquino, A.F.; Vaske-Júnior, T.; Gadig, O.B.F. & Barreiros, J.P. (2011). "Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil". «Cybium – International Journal of Ichthyology», 35(2): 105-109. ISSNe 2101-0315.0399-0974 (print)info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-12-20T14:29:20Zoai:repositorio.uac.pt:10400.3/1575Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:24:27.087898Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
Notes sur les habitudes alimentaires de Rioraja agassizi (Chondrichthyes, Rajidae) dans le sud du Brésil.
title Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
spellingShingle Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
Pasquino, Aline F.
Rajidae
Elasmobranch
Rioraja agassizi
SW Atlantic
Trophic Ecology
title_short Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
title_full Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
title_fullStr Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
title_full_unstemmed Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
title_sort Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil
author Pasquino, Aline F.
author_facet Pasquino, Aline F.
Vaske-Júnior, Teodoro
Gadig, Otto B. F.
Barreiros, João P.
author_role author
author2 Vaske-Júnior, Teodoro
Gadig, Otto B. F.
Barreiros, João P.
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade dos Açores
dc.contributor.author.fl_str_mv Pasquino, Aline F.
Vaske-Júnior, Teodoro
Gadig, Otto B. F.
Barreiros, João P.
dc.subject.por.fl_str_mv Rajidae
Elasmobranch
Rioraja agassizi
SW Atlantic
Trophic Ecology
topic Rajidae
Elasmobranch
Rioraja agassizi
SW Atlantic
Trophic Ecology
description Copyright © 2011 Société Française d’Ichtyologie.
publishDate 2011
dc.date.none.fl_str_mv 2011-06-30
2011-06-30T00:00:00Z
2013-01-22T13:18:09Z
2013-01-16T03:27:12Z
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://hdl.handle.net/10400.3/1575
url http://hdl.handle.net/10400.3/1575
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Pasquino, A.F.; Vaske-Júnior, T.; Gadig, O.B.F. & Barreiros, J.P. (2011). "Notes on the feeding habits of the skate Rioraja agassizi (Chondrichthyes, Rajidae) off southeastern Brazil". «Cybium – International Journal of Ichthyology», 35(2): 105-109. ISSNe 2101-0315.
0399-0974 (print)
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Société Française d’Ichtyologie
publisher.none.fl_str_mv Société Française d’Ichtyologie
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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