Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical ichthyology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400203 |
Resumo: | ABSTRACT Relationship between length and weight (LWR) is used to describe aspects concerning the life cycle of fish, but does not considers possible changes during the lifetime mainly due to the sexual maturation. Thus, this study aims to identify the size at first maturity of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) and infer if the reproductive engagement could change growth pattern, concerning the LWR. Estimates of the size at first maturity (L 50 ) were made by visual identification of gonadal development and through the gonadosomatic index (G SI ). L 50 was estimated as 12.5 cm for males and 13.0 cm for females when applied visual identification of gonads development. L 50 estimates increased to 13.05 cm for males and 13.7 cm for females when estimated from G SI values. LWR was adjusted by using a regular power function and through the polyphasic growth model, with proportionality and allometric coefficients changing in a two phases. The results indicate differences in the growth pattern concerning males and females, as well as polyphasic growth. The change in the growth pattern of the polyphasic LWR was estimated at 11.42 cm for males and 12.53 cm for females, suggesting that changes in the growth pattern can sign-out the attainment maturity in this catfish. |
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Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfishAmazoniaAuchenipteridaeFish reproductionGrowth patternSexual maturityABSTRACT Relationship between length and weight (LWR) is used to describe aspects concerning the life cycle of fish, but does not considers possible changes during the lifetime mainly due to the sexual maturation. Thus, this study aims to identify the size at first maturity of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) and infer if the reproductive engagement could change growth pattern, concerning the LWR. Estimates of the size at first maturity (L 50 ) were made by visual identification of gonadal development and through the gonadosomatic index (G SI ). L 50 was estimated as 12.5 cm for males and 13.0 cm for females when applied visual identification of gonads development. L 50 estimates increased to 13.05 cm for males and 13.7 cm for females when estimated from G SI values. LWR was adjusted by using a regular power function and through the polyphasic growth model, with proportionality and allometric coefficients changing in a two phases. The results indicate differences in the growth pattern concerning males and females, as well as polyphasic growth. The change in the growth pattern of the polyphasic LWR was estimated at 11.42 cm for males and 12.53 cm for females, suggesting that changes in the growth pattern can sign-out the attainment maturity in this catfish.Sociedade Brasileira de Ictiologia2016-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400203Neotropical Ichthyology v.14 n.4 2016reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-20150152info:eu-repo/semantics/openAccessFreitas,Tiago Magalhães da SilvaAlmeida,Vitor Hudson da ConsolaçãoMontag,Luciano Fogaça de AssisFontoura,Nelson Ferreiraeng2017-01-24T00:00:00Zoai:scielo:S1679-62252016000400203Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2017-01-24T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
title |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
spellingShingle |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish Freitas,Tiago Magalhães da Silva Amazonia Auchenipteridae Fish reproduction Growth pattern Sexual maturity |
title_short |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
title_full |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
title_fullStr |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
title_full_unstemmed |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
title_sort |
Predicting size at first sexual maturity from length/weight relationship: a case study with an Amazonian catfish |
author |
Freitas,Tiago Magalhães da Silva |
author_facet |
Freitas,Tiago Magalhães da Silva Almeida,Vitor Hudson da Consolação Montag,Luciano Fogaça de Assis Fontoura,Nelson Ferreira |
author_role |
author |
author2 |
Almeida,Vitor Hudson da Consolação Montag,Luciano Fogaça de Assis Fontoura,Nelson Ferreira |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Freitas,Tiago Magalhães da Silva Almeida,Vitor Hudson da Consolação Montag,Luciano Fogaça de Assis Fontoura,Nelson Ferreira |
dc.subject.por.fl_str_mv |
Amazonia Auchenipteridae Fish reproduction Growth pattern Sexual maturity |
topic |
Amazonia Auchenipteridae Fish reproduction Growth pattern Sexual maturity |
description |
ABSTRACT Relationship between length and weight (LWR) is used to describe aspects concerning the life cycle of fish, but does not considers possible changes during the lifetime mainly due to the sexual maturation. Thus, this study aims to identify the size at first maturity of Auchenipterichthys longimanus (Siluriformes: Auchenipteridae) and infer if the reproductive engagement could change growth pattern, concerning the LWR. Estimates of the size at first maturity (L 50 ) were made by visual identification of gonadal development and through the gonadosomatic index (G SI ). L 50 was estimated as 12.5 cm for males and 13.0 cm for females when applied visual identification of gonads development. L 50 estimates increased to 13.05 cm for males and 13.7 cm for females when estimated from G SI values. LWR was adjusted by using a regular power function and through the polyphasic growth model, with proportionality and allometric coefficients changing in a two phases. The results indicate differences in the growth pattern concerning males and females, as well as polyphasic growth. The change in the growth pattern of the polyphasic LWR was estimated at 11.42 cm for males and 12.53 cm for females, suggesting that changes in the growth pattern can sign-out the attainment maturity in this catfish. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01 |
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=S1679-62252016000400203 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400203 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-20150152 |
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 |
Sociedade Brasileira de Ictiologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia |
dc.source.none.fl_str_mv |
Neotropical Ichthyology v.14 n.4 2016 reponame:Neotropical ichthyology (Online) instname:Sociedade Brasileira de Ictiologia (SBI) instacron:SBI |
instname_str |
Sociedade Brasileira de Ictiologia (SBI) |
instacron_str |
SBI |
institution |
SBI |
reponame_str |
Neotropical ichthyology (Online) |
collection |
Neotropical ichthyology (Online) |
repository.name.fl_str_mv |
Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI) |
repository.mail.fl_str_mv |
||neoichth@nupelia.uem.br |
_version_ |
1752122182267305984 |