Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions
Autor(a) principal: | |
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Data de Publicação: | 2003 |
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/10400.5/27677 |
Resumo: | Decadal changes have been observed in the annual catch of sardine (Sardina pilchardus W). Long-term changes have also been observed in alongshore winds off Portugal in the last decades in winter months. During sardine spawning season (winter), northerly winds that favour upwelling led to unfavourable conditions for egg and larval survival. By using time series analysis, we investigated the effect of wind conditions and North Atlantic Oscillation (NAO) on the sardine catches, in the period from 1946-1991. We also investigated the time lag between recruitment strength and its turnout in catches. We concluded that recruitment is forced to a lower level when the frequency and intensity of northerly wind exceeds a certain limit in winter. Our time series retrospective analyses led to evidence of climatic driven regime-shifts in West Portugal sardine productivity in late 1960s-early 1970s. These results are discussed in terms of their implications in fisheries management plans. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Sardine regime shifts off Portugal : a time series analysis of catches and wind conditionsSardineSardina PilchardusRegime ShiftsTime Series AnalysisCatchRecruitmentWindUpwellingCoastalUpwellingNaoPortugalDecadal changes have been observed in the annual catch of sardine (Sardina pilchardus W). Long-term changes have also been observed in alongshore winds off Portugal in the last decades in winter months. During sardine spawning season (winter), northerly winds that favour upwelling led to unfavourable conditions for egg and larval survival. By using time series analysis, we investigated the effect of wind conditions and North Atlantic Oscillation (NAO) on the sardine catches, in the period from 1946-1991. We also investigated the time lag between recruitment strength and its turnout in catches. We concluded that recruitment is forced to a lower level when the frequency and intensity of northerly wind exceeds a certain limit in winter. Our time series retrospective analyses led to evidence of climatic driven regime-shifts in West Portugal sardine productivity in late 1960s-early 1970s. These results are discussed in terms of their implications in fisheries management plans.CSIC - Consejo Superior de Investigaciones CientificasRepositório da Universidade de LisboaCrato, NunoBorges, M. F.Santos, A. M. P.Mendes, H.Mota, B.2023-04-28T17:34:12Z20032003-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/27677engCrato, Nuno … [et al.] .“Sardine regime shifts off Portugal: a time series analysis of catches and wind conditions”. Scientia Marina, Vol. 67 : ((Suppl. 1): pp. 235-244. (Search PDF in 2023).1886-8134 (Online)10.3989/scimarinfo: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:RCAAP2023-04-30T01:30:58Zoai:www.repository.utl.pt:10400.5/27677Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:50:29.250517Repositório 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 |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
title |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
spellingShingle |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions Crato, Nuno Sardine Sardina Pilchardus Regime Shifts Time Series Analysis Catch Recruitment Wind Upwelling Coastal Upwelling Nao Portugal |
title_short |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
title_full |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
title_fullStr |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
title_full_unstemmed |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
title_sort |
Sardine regime shifts off Portugal : a time series analysis of catches and wind conditions |
author |
Crato, Nuno |
author_facet |
Crato, Nuno Borges, M. F. Santos, A. M. P. Mendes, H. Mota, B. |
author_role |
author |
author2 |
Borges, M. F. Santos, A. M. P. Mendes, H. Mota, B. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Crato, Nuno Borges, M. F. Santos, A. M. P. Mendes, H. Mota, B. |
dc.subject.por.fl_str_mv |
Sardine Sardina Pilchardus Regime Shifts Time Series Analysis Catch Recruitment Wind Upwelling Coastal Upwelling Nao Portugal |
topic |
Sardine Sardina Pilchardus Regime Shifts Time Series Analysis Catch Recruitment Wind Upwelling Coastal Upwelling Nao Portugal |
description |
Decadal changes have been observed in the annual catch of sardine (Sardina pilchardus W). Long-term changes have also been observed in alongshore winds off Portugal in the last decades in winter months. During sardine spawning season (winter), northerly winds that favour upwelling led to unfavourable conditions for egg and larval survival. By using time series analysis, we investigated the effect of wind conditions and North Atlantic Oscillation (NAO) on the sardine catches, in the period from 1946-1991. We also investigated the time lag between recruitment strength and its turnout in catches. We concluded that recruitment is forced to a lower level when the frequency and intensity of northerly wind exceeds a certain limit in winter. Our time series retrospective analyses led to evidence of climatic driven regime-shifts in West Portugal sardine productivity in late 1960s-early 1970s. These results are discussed in terms of their implications in fisheries management plans. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 2003-01-01T00:00:00Z 2023-04-28T17:34:12Z |
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/10400.5/27677 |
url |
http://hdl.handle.net/10400.5/27677 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Crato, Nuno … [et al.] .“Sardine regime shifts off Portugal: a time series analysis of catches and wind conditions”. Scientia Marina, Vol. 67 : ((Suppl. 1): pp. 235-244. (Search PDF in 2023). 1886-8134 (Online) 10.3989/scimar |
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 |
CSIC - Consejo Superior de Investigaciones Cientificas |
publisher.none.fl_str_mv |
CSIC - Consejo Superior de Investigaciones Cientificas |
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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1799131584684621824 |