Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4025/actascibiolsci.v36i1.21039 http://hdl.handle.net/11449/137244 |
Resumo: | This study evaluated the diet and reproductive aspects of the population of Pimelodus maculatus around net cage fish farming in order to assess the possible impacts of this activity. Monthly collections were performed from March 2008 to February 2009 on two populations: one close to the net cages (NC) and one from an area not influenced by these cages denominated the “reference site” (RS). Results of the Alimentary Index (AI), Gonadosomatic Index (GSI), reproductive potential and histological analysis were obtained for both NC and RS populations. The population from NC used leftover food (ration) that escapes from net cages as the main food item (99.3%). For the RS population, the detritus item was the more important food source (51.7%). The Detrended Correspondence Analysis (DCA) showed that the use of food resources was different between the two sites. The reproductive period of the species (indicated by the GSI) revealed that the population of the NC showed an extended reproductive period compared to RS. The histology of the ovaries indicated that the specimens in the NC were spawning capable. This study indicates that fish farming activities influence the species P. maculatus in the Chavantes reservoir by adding a new resource to the food web. |
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Repositório Institucional da UNESP |
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Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, BrazilInfluência de uma piscicultura em tanques-rede sobre a alimentação e aspectos reprodutivos de Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) no reservatório Chavantes, BrasilPeixesBiologiaRepresa neotropicalRio ParanapanemaFishBiologyNeotropical reservoirParanapanema riverThis study evaluated the diet and reproductive aspects of the population of Pimelodus maculatus around net cage fish farming in order to assess the possible impacts of this activity. Monthly collections were performed from March 2008 to February 2009 on two populations: one close to the net cages (NC) and one from an area not influenced by these cages denominated the “reference site” (RS). Results of the Alimentary Index (AI), Gonadosomatic Index (GSI), reproductive potential and histological analysis were obtained for both NC and RS populations. The population from NC used leftover food (ration) that escapes from net cages as the main food item (99.3%). For the RS population, the detritus item was the more important food source (51.7%). The Detrended Correspondence Analysis (DCA) showed that the use of food resources was different between the two sites. The reproductive period of the species (indicated by the GSI) revealed that the population of the NC showed an extended reproductive period compared to RS. The histology of the ovaries indicated that the specimens in the NC were spawning capable. This study indicates that fish farming activities influence the species P. maculatus in the Chavantes reservoir by adding a new resource to the food web.O objetivo deste estudo foi avaliar a dieta e os aspectos reprodutivos da população de Pimelodus maculatus residentes ao redor de tanques-rede. Os peixes foram coletados mensalmente, de março/2008 a fevereiro/2009, a partir de duas populações: uma próxima ao ambiente de tanques-rede (NC) e a outra em uma área não influenciada pelos tanques-rede, denominada área de referência (RS). As análises do Índice Alimentar (AI), Índice Gonadossomático (IG), Potencial Reprodutivo e Histologia das gônadas foram realizadas para as populações das duas áreas amostradas. As populações de NC utilizaram-se de restos de ração que escapam dos tanques-rede, como principal fonte alimentar (99,3%). Para a população do RS, os detritos foram a fonte mais importante (51,7%). A análise de Correspondência Destendenciada (DCA) mostrou diferenças na utilização dos recursos alimentares entre as duas populações. O período reprodutivo das espécies (indicado pelo IG) mostrou que a população do NC apresentou maior período reprodutivo em relação às populações do RS. A histologia dos ovários indicou que os espécimes de NC estavam aptos à desova. Este estudo adverte que as atividades de piscicultura influenciam a referida espécie na represa de Chavantes pela adição de um novo recurso para a cadeia alimentar.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Morfologia, Instituto de Biociências, Botucatu, Distrito de Rubião Júnior, Rubião Junior, CEP 18618970, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Biologia e Zootecnia, Faculdade de Engenharia de Ilha Solteira, Ilha Solteira, Rua Monção, nº 226, Faculdade de Engenharia de Ilha Solteira (FEIS), CEP 15385000, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Morfologia, Instituto de Biociências, Botucatu, Distrito de Rubião Júnior, Rubião Junior, CEP 18618970, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Biologia e Zootecnia, Faculdade de Engenharia de Ilha Solteira, Ilha Solteira, Rua Monção, nº 226, Faculdade de Engenharia de Ilha Solteira (FEIS), CEP 15385000, SP, BrasilUniversidade Estadual Paulista (Unesp)Brandão, Heleno [UNESP]Santana, Julio Cesar de Oliveira [UNESP]Ramos, Igor Paiva [UNESP]Carvalho, Edmir Daniel [UNESP]2016-04-01T18:44:51Z2016-04-01T18:44:51Z2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article41-50application/pdfhttp://dx.doi.org/10.4025/actascibiolsci.v36i1.21039Acta Scientiarum. Biological Sciences, v. 36, n. 1, p. 41-50, 2014.1679-9283http://hdl.handle.net/11449/13724410.4025/actascibiolsci.v36i1.21039ISSN1679-9283-2014-36-01-41-50.pdf2573361275809992Currículo Lattesreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengActa Scientiarum. Biological Sciences0,208info:eu-repo/semantics/openAccess2023-10-30T06:05:38Zoai:repositorio.unesp.br:11449/137244Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-30T06:05:38Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil Influência de uma piscicultura em tanques-rede sobre a alimentação e aspectos reprodutivos de Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) no reservatório Chavantes, Brasil |
title |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil |
spellingShingle |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil Brandão, Heleno [UNESP] Peixes Biologia Represa neotropical Rio Paranapanema Fish Biology Neotropical reservoir Paranapanema river |
title_short |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil |
title_full |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil |
title_fullStr |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil |
title_full_unstemmed |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil |
title_sort |
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil |
author |
Brandão, Heleno [UNESP] |
author_facet |
Brandão, Heleno [UNESP] Santana, Julio Cesar de Oliveira [UNESP] Ramos, Igor Paiva [UNESP] Carvalho, Edmir Daniel [UNESP] |
author_role |
author |
author2 |
Santana, Julio Cesar de Oliveira [UNESP] Ramos, Igor Paiva [UNESP] Carvalho, Edmir Daniel [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Brandão, Heleno [UNESP] Santana, Julio Cesar de Oliveira [UNESP] Ramos, Igor Paiva [UNESP] Carvalho, Edmir Daniel [UNESP] |
dc.subject.por.fl_str_mv |
Peixes Biologia Represa neotropical Rio Paranapanema Fish Biology Neotropical reservoir Paranapanema river |
topic |
Peixes Biologia Represa neotropical Rio Paranapanema Fish Biology Neotropical reservoir Paranapanema river |
description |
This study evaluated the diet and reproductive aspects of the population of Pimelodus maculatus around net cage fish farming in order to assess the possible impacts of this activity. Monthly collections were performed from March 2008 to February 2009 on two populations: one close to the net cages (NC) and one from an area not influenced by these cages denominated the “reference site” (RS). Results of the Alimentary Index (AI), Gonadosomatic Index (GSI), reproductive potential and histological analysis were obtained for both NC and RS populations. The population from NC used leftover food (ration) that escapes from net cages as the main food item (99.3%). For the RS population, the detritus item was the more important food source (51.7%). The Detrended Correspondence Analysis (DCA) showed that the use of food resources was different between the two sites. The reproductive period of the species (indicated by the GSI) revealed that the population of the NC showed an extended reproductive period compared to RS. The histology of the ovaries indicated that the specimens in the NC were spawning capable. This study indicates that fish farming activities influence the species P. maculatus in the Chavantes reservoir by adding a new resource to the food web. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 2016-04-01T18:44:51Z 2016-04-01T18:44:51Z |
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/10.4025/actascibiolsci.v36i1.21039 Acta Scientiarum. Biological Sciences, v. 36, n. 1, p. 41-50, 2014. 1679-9283 http://hdl.handle.net/11449/137244 10.4025/actascibiolsci.v36i1.21039 ISSN1679-9283-2014-36-01-41-50.pdf 2573361275809992 |
url |
http://dx.doi.org/10.4025/actascibiolsci.v36i1.21039 http://hdl.handle.net/11449/137244 |
identifier_str_mv |
Acta Scientiarum. Biological Sciences, v. 36, n. 1, p. 41-50, 2014. 1679-9283 10.4025/actascibiolsci.v36i1.21039 ISSN1679-9283-2014-36-01-41-50.pdf 2573361275809992 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Acta Scientiarum. Biological Sciences 0,208 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
41-50 application/pdf |
dc.source.none.fl_str_mv |
Currículo Lattes 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_ |
1797789553904320512 |