Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters

Detalhes bibliográficos
Autor(a) principal: Vasconcelos, Joana
Data de Publicação: 2012
Outros Autores: Afonso-Dias, Manuel, Faria, Graça
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.13/4379
Resumo: The pelagic chub mackerel, Scomber colias Gmelin, 1789 is one of the most important fishery resources in the Madeira Archipelago. S. colias is caught by a small and coastal purse-seine fleet that traditionally operates around the islands. Monthly samples of chub mackerel were taken from commercial landings, between January 2002 and December 2005. Sex and maturity were assigned by visually inspecting the gonads of 1998 males (17.4-46.0 cm total length, TL; 0-5 yr) and 2108 females (18.0-41.2 cm TL; 0-4 yr) using a five-stages macroscopic maturity scale; 99 specimens with undetermined sex (13.0-26.8 cm TL; 0 yr) were also sampled. The analysis of monthly gonadosomatic indices and maturity stages proportions showed that gonad development started slowly in July-August and in creased in October-December, for males and females. Spawning took place between Janu ary-April peaking in February-March. Maturity ogives were fitted to the observed propor tions of mature males and females by using non-linear methods, to estimate size and age at first maturity: 22.12 cm TL at 1.05 yr for males and 21.55 cm TL at 0.82 yr for females.
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spelling Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira watersGonadosomatic indexFisheriesMadeira IslandReproductive period.Faculdade de Ciências da VidaThe pelagic chub mackerel, Scomber colias Gmelin, 1789 is one of the most important fishery resources in the Madeira Archipelago. S. colias is caught by a small and coastal purse-seine fleet that traditionally operates around the islands. Monthly samples of chub mackerel were taken from commercial landings, between January 2002 and December 2005. Sex and maturity were assigned by visually inspecting the gonads of 1998 males (17.4-46.0 cm total length, TL; 0-5 yr) and 2108 females (18.0-41.2 cm TL; 0-4 yr) using a five-stages macroscopic maturity scale; 99 specimens with undetermined sex (13.0-26.8 cm TL; 0 yr) were also sampled. The analysis of monthly gonadosomatic indices and maturity stages proportions showed that gonad development started slowly in July-August and in creased in October-December, for males and females. Spawning took place between Janu ary-April peaking in February-March. Maturity ogives were fitted to the observed propor tions of mature males and females by using non-linear methods, to estimate size and age at first maturity: 22.12 cm TL at 1.05 yr for males and 21.55 cm TL at 0.82 yr for females.Universidade dos AçoresDigitUMaVasconcelos, JoanaAfonso-Dias, ManuelFaria, Graça2022-07-08T09:22:55Z20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/4379engVasconcelos, J., Afonso-Dias, M., & Faria, G. (2012). Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters. Arquipélago. Life and Marine Sciences, (29), 43-51.info: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:RCAAP2023-01-29T03:30:30Zoai:digituma.uma.pt:10400.13/4379Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:08:24.730505Repositório 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 Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
title Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
spellingShingle Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
Vasconcelos, Joana
Gonadosomatic index
Fisheries
Madeira Island
Reproductive period
.
Faculdade de Ciências da Vida
title_short Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
title_full Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
title_fullStr Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
title_full_unstemmed Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
title_sort Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters
author Vasconcelos, Joana
author_facet Vasconcelos, Joana
Afonso-Dias, Manuel
Faria, Graça
author_role author
author2 Afonso-Dias, Manuel
Faria, Graça
author2_role author
author
dc.contributor.none.fl_str_mv DigitUMa
dc.contributor.author.fl_str_mv Vasconcelos, Joana
Afonso-Dias, Manuel
Faria, Graça
dc.subject.por.fl_str_mv Gonadosomatic index
Fisheries
Madeira Island
Reproductive period
.
Faculdade de Ciências da Vida
topic Gonadosomatic index
Fisheries
Madeira Island
Reproductive period
.
Faculdade de Ciências da Vida
description The pelagic chub mackerel, Scomber colias Gmelin, 1789 is one of the most important fishery resources in the Madeira Archipelago. S. colias is caught by a small and coastal purse-seine fleet that traditionally operates around the islands. Monthly samples of chub mackerel were taken from commercial landings, between January 2002 and December 2005. Sex and maturity were assigned by visually inspecting the gonads of 1998 males (17.4-46.0 cm total length, TL; 0-5 yr) and 2108 females (18.0-41.2 cm TL; 0-4 yr) using a five-stages macroscopic maturity scale; 99 specimens with undetermined sex (13.0-26.8 cm TL; 0 yr) were also sampled. The analysis of monthly gonadosomatic indices and maturity stages proportions showed that gonad development started slowly in July-August and in creased in October-December, for males and females. Spawning took place between Janu ary-April peaking in February-March. Maturity ogives were fitted to the observed propor tions of mature males and females by using non-linear methods, to estimate size and age at first maturity: 22.12 cm TL at 1.05 yr for males and 21.55 cm TL at 0.82 yr for females.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
2022-07-08T09:22:55Z
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/10400.13/4379
url http://hdl.handle.net/10400.13/4379
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Vasconcelos, J., Afonso-Dias, M., & Faria, G. (2012). Atlantic chub mackerel (Scomber colias) spawning season, size and age at first maturity in Madeira waters. Arquipélago. Life and Marine Sciences, (29), 43-51.
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 Universidade dos Açores
publisher.none.fl_str_mv Universidade dos Açores
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
instacron_str RCAAP
institution RCAAP
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
repository.mail.fl_str_mv
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