Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system

Detalhes bibliográficos
Autor(a) principal: Geraldes, Ana Maria
Data de Publicação: 1995
Outros Autores: Collares-Pereira, M.J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/897
Resumo: An investigation of age and growth in the Iberian chub Leuciscus pyrenaicus Gunther, 1868 revealed a seasonal growth pattern, with annulus formation restricted to a short period of the year (May/June). Maximum ages were 6+ for both sexes. During and after the third year females grew at faster rates than males, and the most important decrease in growth rates occurred between age I! and Ill in males and between age Ill and IV in females. Mean back-calculated standard lengths of III and IV age classes were significantly higher in the River Sorraia. Mean weights of I and II age classes were higher in Sor stream whereas the individuals from III ad IV age classes were heavier in the River Sorraia. Shifts in growth rates arc discussed in relation to seasonal and spatial variations in the environmental conditions as well as to sexual maturity.
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spelling Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia systemAn investigation of age and growth in the Iberian chub Leuciscus pyrenaicus Gunther, 1868 revealed a seasonal growth pattern, with annulus formation restricted to a short period of the year (May/June). Maximum ages were 6+ for both sexes. During and after the third year females grew at faster rates than males, and the most important decrease in growth rates occurred between age I! and Ill in males and between age Ill and IV in females. Mean back-calculated standard lengths of III and IV age classes were significantly higher in the River Sorraia. Mean weights of I and II age classes were higher in Sor stream whereas the individuals from III ad IV age classes were heavier in the River Sorraia. Shifts in growth rates arc discussed in relation to seasonal and spatial variations in the environmental conditions as well as to sexual maturity.Institute of Vertebrate Biology. Academy of Sciences of the Czech RepublicBiblioteca Digital do IPBGeraldes, Ana MariaCollares-Pereira, M.J.2008-09-23T09:44:03Z19951995-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/897engGeraldes, Ana Maria; Collares-Pereira, M.J. (1995) . Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the Sorraia system. Folia Zoologica. ISSN 0139-7893. 44:2. p. 159-1650139-7893info: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:RCAAP2023-11-21T10:04:06Zoai:bibliotecadigital.ipb.pt:10198/897Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:31.103419Repositório 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 Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
title Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
spellingShingle Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
Geraldes, Ana Maria
title_short Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
title_full Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
title_fullStr Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
title_full_unstemmed Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
title_sort Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the sorraia system
author Geraldes, Ana Maria
author_facet Geraldes, Ana Maria
Collares-Pereira, M.J.
author_role author
author2 Collares-Pereira, M.J.
author2_role author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Geraldes, Ana Maria
Collares-Pereira, M.J.
description An investigation of age and growth in the Iberian chub Leuciscus pyrenaicus Gunther, 1868 revealed a seasonal growth pattern, with annulus formation restricted to a short period of the year (May/June). Maximum ages were 6+ for both sexes. During and after the third year females grew at faster rates than males, and the most important decrease in growth rates occurred between age I! and Ill in males and between age Ill and IV in females. Mean back-calculated standard lengths of III and IV age classes were significantly higher in the River Sorraia. Mean weights of I and II age classes were higher in Sor stream whereas the individuals from III ad IV age classes were heavier in the River Sorraia. Shifts in growth rates arc discussed in relation to seasonal and spatial variations in the environmental conditions as well as to sexual maturity.
publishDate 1995
dc.date.none.fl_str_mv 1995
1995-01-01T00:00:00Z
2008-09-23T09:44:03Z
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/10198/897
url http://hdl.handle.net/10198/897
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Geraldes, Ana Maria; Collares-Pereira, M.J. (1995) . Preliminary insight into age and growth of the Iberian chub (Leuciscus pyrenaicus) in the Sorraia system. Folia Zoologica. ISSN 0139-7893. 44:2. p. 159-165
0139-7893
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 Institute of Vertebrate Biology. Academy of Sciences of the Czech Republic
publisher.none.fl_str_mv Institute of Vertebrate Biology. Academy of Sciences of the Czech Republic
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
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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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