Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil

Detalhes bibliográficos
Autor(a) principal: Abelha,Milza Celi Fedatto
Data de Publicação: 2012
Outros Autores: Kashiwaqui,Elaine Antoniassi Luiz, Goulart,Erivelto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Biota Neotropica
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100015
Resumo: This study investigated the population parameters, condition and diet of Oligosarcus paranensis at Fiú and Mourão Reservoirs, located in Paraná State, Brazil. The fishes were collected quarterly between 1996/1997 and 1998/1999 using gillnets. Food items were quantified by volumetric method. The specimens at Fiú showed comparatively smaller length and worse condition. Sex ratio was statistically equal to 1:1 at Mourão, whereas there was a significant predominance of males at Fiú. Sex ratio also varied among size classes. Allometric growth prevailed among the studied groups. The diet consisted mainly of fishes and was complemented with invertebrates and plant matter in both reservoirs. There was a change in the feeding pattern as the standard length increased. Fishes changed from invertivores to piscivores, except for males in Mourão, for which a reverse trend occurred.
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spelling Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazilfishsex ratiofeedingdog-tooth characidimpoundmentsThis study investigated the population parameters, condition and diet of Oligosarcus paranensis at Fiú and Mourão Reservoirs, located in Paraná State, Brazil. The fishes were collected quarterly between 1996/1997 and 1998/1999 using gillnets. Food items were quantified by volumetric method. The specimens at Fiú showed comparatively smaller length and worse condition. Sex ratio was statistically equal to 1:1 at Mourão, whereas there was a significant predominance of males at Fiú. Sex ratio also varied among size classes. Allometric growth prevailed among the studied groups. The diet consisted mainly of fishes and was complemented with invertebrates and plant matter in both reservoirs. There was a change in the feeding pattern as the standard length increased. Fishes changed from invertivores to piscivores, except for males in Mourão, for which a reverse trend occurred.Instituto Virtual da Biodiversidade | BIOTA - FAPESP2012-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100015Biota Neotropica v.12 n.1 2012reponame:Biota Neotropicainstname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP)instacron:BIOTA - FAPESP10.1590/S1676-06032012000100015info:eu-repo/semantics/openAccessAbelha,Milza Celi FedattoKashiwaqui,Elaine Antoniassi LuizGoulart,Eriveltoeng2012-07-24T00:00:00Zoai:scielo:S1676-06032012000100015Revistahttps://www.biotaneotropica.org.br/v20n1/pt/https://old.scielo.br/oai/scielo-oai.php||juliosa@unifap.br1676-06111676-0611opendoar:2012-07-24T00:00Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP)false
dc.title.none.fl_str_mv Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
title Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
spellingShingle Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
Abelha,Milza Celi Fedatto
fish
sex ratio
feeding
dog-tooth characid
impoundments
title_short Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
title_full Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
title_fullStr Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
title_full_unstemmed Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
title_sort Population structure, condition and diet of Oligosarcus paranensis (Menezes & Gery, 1983) (Osteichthyes: Characidae) at two reservoirs in South Brazil
author Abelha,Milza Celi Fedatto
author_facet Abelha,Milza Celi Fedatto
Kashiwaqui,Elaine Antoniassi Luiz
Goulart,Erivelto
author_role author
author2 Kashiwaqui,Elaine Antoniassi Luiz
Goulart,Erivelto
author2_role author
author
dc.contributor.author.fl_str_mv Abelha,Milza Celi Fedatto
Kashiwaqui,Elaine Antoniassi Luiz
Goulart,Erivelto
dc.subject.por.fl_str_mv fish
sex ratio
feeding
dog-tooth characid
impoundments
topic fish
sex ratio
feeding
dog-tooth characid
impoundments
description This study investigated the population parameters, condition and diet of Oligosarcus paranensis at Fiú and Mourão Reservoirs, located in Paraná State, Brazil. The fishes were collected quarterly between 1996/1997 and 1998/1999 using gillnets. Food items were quantified by volumetric method. The specimens at Fiú showed comparatively smaller length and worse condition. Sex ratio was statistically equal to 1:1 at Mourão, whereas there was a significant predominance of males at Fiú. Sex ratio also varied among size classes. Allometric growth prevailed among the studied groups. The diet consisted mainly of fishes and was complemented with invertebrates and plant matter in both reservoirs. There was a change in the feeding pattern as the standard length increased. Fishes changed from invertivores to piscivores, except for males in Mourão, for which a reverse trend occurred.
publishDate 2012
dc.date.none.fl_str_mv 2012-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100015
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000100015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1676-06032012000100015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Instituto Virtual da Biodiversidade | BIOTA - FAPESP
publisher.none.fl_str_mv Instituto Virtual da Biodiversidade | BIOTA - FAPESP
dc.source.none.fl_str_mv Biota Neotropica v.12 n.1 2012
reponame:Biota Neotropica
instname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP)
instacron:BIOTA - FAPESP
instname_str Instituto Virtual da Biodiversidade (BIOTA-FAPESP)
instacron_str BIOTA - FAPESP
institution BIOTA - FAPESP
reponame_str Biota Neotropica
collection Biota Neotropica
repository.name.fl_str_mv Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP)
repository.mail.fl_str_mv ||juliosa@unifap.br
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