Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population

Marked reared turbot, Scophthalmus maximus (L.) (594) were released onto an exposed beach nursery ground together with marked wild fish (438) of approximately the same size (4–6 cm TL) and were sampled at intervals for 38 days. A consistent ratio of marked wild: unmarked wild indicated that marking...

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Detalhes bibliográficos
Autores: Iglesias-Estévez, José, Rodríguez-Ojea, G., Otero-Pinzas, Juan José, Fuentes, Lidia, Ellis, T.
Tipo de documento: artigo
Data de publicação:2003
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/315654
Acesso em linha:http://hdl.handle.net/10261/315654
Access Level:Acceso aberto
Palavra-chave:Centro Oceanográfico de Vigo
Acuicultura
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spelling Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural populationIglesias-Estévez, JoséRodríguez-Ojea, G.Otero-Pinzas, Juan JoséFuentes, LidiaEllis, T.Centro Oceanográfico de VigoAcuiculturaMarked reared turbot, Scophthalmus maximus (L.) (594) were released onto an exposed beach nursery ground together with marked wild fish (438) of approximately the same size (4–6 cm TL) and were sampled at intervals for 38 days. A consistent ratio of marked wild: unmarked wild indicated that marking did not increase mortality. The wild 0-group turbot population size was estimated at 1540 at the time of release, indicating that hatchery-reared individuals could theoretically make a significant contribution to the local population size. However, the absolute and relative catches of the marked, reared fish were lower than those of the marked wild fish, and no reared fish were caught after 23 days. The higher mortality rate was attributed to both a smaller size and their hatchery-reared origin. The population dynamics of the 1994–1995 year-classes of wild turbot were also studied. Recruitment of post-larvae (3 cm) to the beach started in March and continued until October. Population size peaked over the August–October period. Juvenile turbot remained on the nursery beach until June of the following year when they presumably emigrated to deeper water. During this 15-month period their length increased from 3 to 12–15 cm.Sí202320232003info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/315654reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigohttps://doi.org/10.1046/j.1365-2400.2003.00318.xinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3156542026-05-22T06:33:51Z
dc.title.none.fl_str_mv Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
title Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
spellingShingle Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
Iglesias-Estévez, José
Centro Oceanográfico de Vigo
Acuicultura
title_short Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
title_full Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
title_fullStr Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
title_full_unstemmed Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
title_sort Comparison of mortality of wild and released reared 0-group turbot, Scophthalmus maximus, on a exposed beach and a study of the population dynamics and ecology of the natural population
dc.creator.none.fl_str_mv Iglesias-Estévez, José
Rodríguez-Ojea, G.
Otero-Pinzas, Juan José
Fuentes, Lidia
Ellis, T.
author Iglesias-Estévez, José
author_facet Iglesias-Estévez, José
Rodríguez-Ojea, G.
Otero-Pinzas, Juan José
Fuentes, Lidia
Ellis, T.
author_role author
author2 Rodríguez-Ojea, G.
Otero-Pinzas, Juan José
Fuentes, Lidia
Ellis, T.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Centro Oceanográfico de Vigo
Acuicultura
topic Centro Oceanográfico de Vigo
Acuicultura
description Marked reared turbot, Scophthalmus maximus (L.) (594) were released onto an exposed beach nursery ground together with marked wild fish (438) of approximately the same size (4–6 cm TL) and were sampled at intervals for 38 days. A consistent ratio of marked wild: unmarked wild indicated that marking did not increase mortality. The wild 0-group turbot population size was estimated at 1540 at the time of release, indicating that hatchery-reared individuals could theoretically make a significant contribution to the local population size. However, the absolute and relative catches of the marked, reared fish were lower than those of the marked wild fish, and no reared fish were caught after 23 days. The higher mortality rate was attributed to both a smaller size and their hatchery-reared origin. The population dynamics of the 1994–1995 year-classes of wild turbot were also studied. Recruitment of post-larvae (3 cm) to the beach started in March and continued until October. Population size peaked over the August–October period. Juvenile turbot remained on the nursery beach until June of the following year when they presumably emigrated to deeper water. During this 15-month period their length increased from 3 to 12–15 cm.
publishDate 2003
dc.date.none.fl_str_mv 2003
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/315654
url http://hdl.handle.net/10261/315654
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Vigo
https://doi.org/10.1046/j.1365-2400.2003.00318.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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