Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams?
Autor(a) principal: | |
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Data de Publicação: | 1996 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/5314 |
Resumo: | The effect of trout stocking was evaluated in two headstreams located in northern Portugal in order to assess the impact on wild trout (Salmo trutta L.) and to analyze the success of this operation. The results obtained exhibited the limitation of stocking: 1) the clumped character of the release fishes created a high mortality and limited the increasing of salmonid population to a few weeks; 2) because density-dependent factors seem to prevail in the regulation of salmonid populations, stocking is beneficial only if a population has became scarce, otherwise, the autochthonous fish may be strongly impacted; 3) the relative vulnerability of each age class of the native trout may vary according with the site. |
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Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams?StockingBrown troutImpactFish managementThe effect of trout stocking was evaluated in two headstreams located in northern Portugal in order to assess the impact on wild trout (Salmo trutta L.) and to analyze the success of this operation. The results obtained exhibited the limitation of stocking: 1) the clumped character of the release fishes created a high mortality and limited the increasing of salmonid population to a few weeks; 2) because density-dependent factors seem to prevail in the regulation of salmonid populations, stocking is beneficial only if a population has became scarce, otherwise, the autochthonous fish may be strongly impacted; 3) the relative vulnerability of each age class of the native trout may vary according with the site.Biblioteca Digital do IPBCortes, Rui M.V.Teixeira, AmílcarPereira, Clara2011-06-22T08:58:21Z19961996-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/5314engCortes R.M.V.; Teixeira A.; Pereira C. (1996). Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? Folia Zoologica. ISSN 0139-7893. 45:4, p. 371-3810139-7893info: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:RCAAP2023-11-21T10:12:29Zoai:bibliotecadigital.ipb.pt:10198/5314Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:57:21.348002Repositório 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 |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
title |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
spellingShingle |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? Cortes, Rui M.V. Stocking Brown trout Impact Fish management |
title_short |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
title_full |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
title_fullStr |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
title_full_unstemmed |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
title_sort |
Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? |
author |
Cortes, Rui M.V. |
author_facet |
Cortes, Rui M.V. Teixeira, Amílcar Pereira, Clara |
author_role |
author |
author2 |
Teixeira, Amílcar Pereira, Clara |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Cortes, Rui M.V. Teixeira, Amílcar Pereira, Clara |
dc.subject.por.fl_str_mv |
Stocking Brown trout Impact Fish management |
topic |
Stocking Brown trout Impact Fish management |
description |
The effect of trout stocking was evaluated in two headstreams located in northern Portugal in order to assess the impact on wild trout (Salmo trutta L.) and to analyze the success of this operation. The results obtained exhibited the limitation of stocking: 1) the clumped character of the release fishes created a high mortality and limited the increasing of salmonid population to a few weeks; 2) because density-dependent factors seem to prevail in the regulation of salmonid populations, stocking is beneficial only if a population has became scarce, otherwise, the autochthonous fish may be strongly impacted; 3) the relative vulnerability of each age class of the native trout may vary according with the site. |
publishDate |
1996 |
dc.date.none.fl_str_mv |
1996 1996-01-01T00:00:00Z 2011-06-22T08:58:21Z |
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/10198/5314 |
url |
http://hdl.handle.net/10198/5314 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Cortes R.M.V.; Teixeira A.; Pereira C. (1996). Is supplemental stocking of brown trout (Salmo trutta) worthwhile in low productive streams? Folia Zoologica. ISSN 0139-7893. 45:4, p. 371-381 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.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 |
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1799135187581272064 |