Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1519-69842011000400023 http://hdl.handle.net/11449/21207 |
Resumo: | Four biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females. |
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Repositório Institucional da UNESP |
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Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazilfeedingreproductioncondition factorseasonalityFour biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females.Univ Estadual Paulista UNESP, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP, BrazilUniv Estadual Paulista UNESP, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP, BrazilInt Inst EcologyUniversidade Estadual Paulista (Unesp)Villares Junior, G. A. [UNESP]Gomiero, L. M. [UNESP]Goitein, R. [UNESP]2014-05-20T13:59:58Z2014-05-20T13:59:58Z2011-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article763-770http://dx.doi.org/10.1590/S1519-69842011000400023Brazilian Journal of Biology. São Carlos: Int Inst Ecology, v. 71, n. 3, p. 763-770, 2011.1519-6984http://hdl.handle.net/11449/2120710.1590/S1519-69842011000400023S1519-69842011000400023WOS:0002944371000239317499005247273Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Biology0.7840,523info:eu-repo/semantics/openAccess2021-10-22T19:44:58Zoai:repositorio.unesp.br:11449/21207Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T19:44:58Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
title |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
spellingShingle |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil Villares Junior, G. A. [UNESP] feeding reproduction condition factor seasonality |
title_short |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
title_full |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
title_fullStr |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
title_full_unstemmed |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
title_sort |
Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil |
author |
Villares Junior, G. A. [UNESP] |
author_facet |
Villares Junior, G. A. [UNESP] Gomiero, L. M. [UNESP] Goitein, R. [UNESP] |
author_role |
author |
author2 |
Gomiero, L. M. [UNESP] Goitein, R. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Villares Junior, G. A. [UNESP] Gomiero, L. M. [UNESP] Goitein, R. [UNESP] |
dc.subject.por.fl_str_mv |
feeding reproduction condition factor seasonality |
topic |
feeding reproduction condition factor seasonality |
description |
Four biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-08-01 2014-05-20T13:59:58Z 2014-05-20T13:59:58Z |
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/10.1590/S1519-69842011000400023 Brazilian Journal of Biology. São Carlos: Int Inst Ecology, v. 71, n. 3, p. 763-770, 2011. 1519-6984 http://hdl.handle.net/11449/21207 10.1590/S1519-69842011000400023 S1519-69842011000400023 WOS:000294437100023 9317499005247273 |
url |
http://dx.doi.org/10.1590/S1519-69842011000400023 http://hdl.handle.net/11449/21207 |
identifier_str_mv |
Brazilian Journal of Biology. São Carlos: Int Inst Ecology, v. 71, n. 3, p. 763-770, 2011. 1519-6984 10.1590/S1519-69842011000400023 S1519-69842011000400023 WOS:000294437100023 9317499005247273 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Biology 0.784 0,523 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
763-770 |
dc.publisher.none.fl_str_mv |
Int Inst Ecology |
publisher.none.fl_str_mv |
Int Inst Ecology |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1799965364041285632 |