Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal

Detalhes bibliográficos
Autor(a) principal: Almeida, Joana Maria Veloso Rodrigues Bento de
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/7676
Resumo: Dissertação de mestrado, Biologia Marinha, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015
id RCAP_146cb68b196ad3ee5bf1b41bd109434a
oai_identifier_str oai:sapientia.ualg.pt:10400.1/7676
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Spatial and temporal variation of commercially important bivalve species in the Algarve coast, PortugalBiologia marinhaBivalvesDistribuiçãoFatores ambientaisPescas - AlgarveDomínio/Área Científica::Ciências Naturais::Ciências BiológicasDissertação de mestrado, Biologia Marinha, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015Artisanal fisheries in the Algarve are a very important industry for local communities and for the local economy. The target species in this fishery are the white clam (Spisula solida), the striped venus (Chamelea gallina), the donax clam (Donax trunulus) and razor clam (Ensis siliqua). The Portuguese Institute of the Sea and Atmosphere (IPMA) is responsible for the management of these fisheries and the existing resources, to ensure its sustainable development. It is known that in addition to the fishing pressure exerted on these coastal bivalve populations, there are environmental factors that influence their growth and reproductive success. This study was based on the monitoring campaigns of these bivalve banks, held annually by the IPMA, from 1999 to 2011, as well as environmental data of rainfall, an indicator of food availability (chlorophyll a), wind index and Sea surface Temperature (SST) over these 13 years. The objectives of this study are to analyze the variation of the spatial and temporal distribution of these species in the Western and Eastern Algarve, as well as to evaluate how the studied environmental parameters condition the abundance of the species concerned, in the following year, for the period before spawning and for the period after spawning + one month. Thus, annual distribution maps were elaborated for each species and region (Western and Eastern) and 16 linear models were applied to all four studied species, the two regions (Barlavento and Sotavento) and the study period ( three months before spawning and spawning + one month The results of this study showed that the distribution and abundance of these species varies over the years, revealing different patterns of banks in terms of preference or absence for each species, and that all the analyzed environmental factors were significant in determining their abundance, the following year. The most significant environmental parameters affecting abundance were the rainfall and the chlorophyll a levels, especially in the Western area. In general, increasing chlorophyll levels were beneficial in contributing to the abundance of species either breeding adults or growing larvae, while the most abundant rainfall levels were positive for adult populations, and negative to the early life stages of these bivalves. This study also shows the need to develop a better understanding of the relationship between the environmental parameters studied and the specific characteristic of the Algarve coast, so there can be a better management of the stocks, and an anticipated prediction of the populations’ growth, which will enable a better monitoring of these important bivalve communities.Artisanal fisheries in the Algarve are a very important industry for local communities and for the local economy. The target species in this fishery are the white clam (Spisula solida), the striped venus (Chamelea gallina), the donax clam (Donax trunulus) and razor clam (Ensis siliqua). The Portuguese Institute of the Sea and Atmosphere (IPMA) is responsible for the management of these fisheries and the existing resources, to ensure its sustainable development. It is known that in addition to the fishing pressure exerted on these coastal bivalve populations, there are environmental factors that influence their growth and reproductive success. This study was based on the monitoring campaigns of these bivalve banks, held annually by the IPMA, from 1999 to 2011, as well as environmental data of rainfall, an indicator of food availability (chlorophyll a), wind index and Sea surface Temperature (SST) over these 13 years. The objectives of this study are to analyze the variation of the spatial and temporal distribution of these species in the Western and Eastern Algarve, as well as to evaluate how the studied environmental parameters condition the abundance of the species concerned, in the following year, for the period before spawning and for the period after spawning + one month. Thus, annual distribution maps were elaborated for each species and region (Western and Eastern) and 16 linear models were applied to all four studied species, the two regions (Barlavento and Sotavento) and the study period ( three months before spawning and spawning + one month The results of this study showed that the distribution and abundance of these species varies over the years, revealing different patterns of banks in terms of preference or absence for each species, and that all the analyzed environmental factors were significant in determining their abundance, the following year. The most significant environmental parameters affecting abundance were the rainfall and the chlorophyll a levels, especially in the Western area. In general, increasing chlorophyll levels were beneficial in contributing to the abundance of species either breeding adults or growing larvae, while the most abundant rainfall levels were positive for adult populations, and negative to the early life stages of these bivalves. This study also shows the need to develop a better understanding of the relationship between the environmental parameters studied and the specific characteristic of the Algarve coast, so there can be a better management of the stocks, and an anticipated prediction of the populations’ growth, which will enable a better monitoring of these important bivalve communities.Castro, MargaridaGaspar, MiguelSapientiaAlmeida, Joana Maria Veloso Rodrigues Bento de2016-02-13T14:16:37Z2015-12-0420152015-12-04T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.1/7676TID:201218755enginfo: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:RCAAP2023-07-24T10:18:49Zoai:sapientia.ualg.pt:10400.1/7676Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:59:59.391921Repositório 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 Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
title Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
spellingShingle Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
Almeida, Joana Maria Veloso Rodrigues Bento de
Biologia marinha
Bivalves
Distribuição
Fatores ambientais
Pescas - Algarve
Domínio/Área Científica::Ciências Naturais::Ciências Biológicas
title_short Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
title_full Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
title_fullStr Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
title_full_unstemmed Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
title_sort Spatial and temporal variation of commercially important bivalve species in the Algarve coast, Portugal
author Almeida, Joana Maria Veloso Rodrigues Bento de
author_facet Almeida, Joana Maria Veloso Rodrigues Bento de
author_role author
dc.contributor.none.fl_str_mv Castro, Margarida
Gaspar, Miguel
Sapientia
dc.contributor.author.fl_str_mv Almeida, Joana Maria Veloso Rodrigues Bento de
dc.subject.por.fl_str_mv Biologia marinha
Bivalves
Distribuição
Fatores ambientais
Pescas - Algarve
Domínio/Área Científica::Ciências Naturais::Ciências Biológicas
topic Biologia marinha
Bivalves
Distribuição
Fatores ambientais
Pescas - Algarve
Domínio/Área Científica::Ciências Naturais::Ciências Biológicas
description Dissertação de mestrado, Biologia Marinha, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 2015
publishDate 2015
dc.date.none.fl_str_mv 2015-12-04
2015
2015-12-04T00:00:00Z
2016-02-13T14:16:37Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.1/7676
TID:201218755
url http://hdl.handle.net/10400.1/7676
identifier_str_mv TID:201218755
dc.language.iso.fl_str_mv eng
language eng
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
repository.mail.fl_str_mv
_version_ 1799133224062943232

Registros relacionados