Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias
Autor(a) principal: | |
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Data de Publicação: | 2007 |
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/10284/835 |
Resumo: | Mollusc culture is one of the most important types of mariculture, with suspension feeding bivalves being among the most cultivated organisms. In the last years, there has been a growing concern about carrying capacity (CC) of natural ecosystems for bivalve culture, because of decreases in growth rates and mass mortalities due to overstocking. Several methods have been proposed for CC estimation. The simplest are based on average properties integrated over various time scales, like water renewal rate, phytoplankton primary production and bivalve clearance rate. If the time scale of the former two processes is larger than the time scale for bivalve filtration than, bivalve standing stock is over ecosystem CC. More complex approaches are based on ecosystem box modelling or coupled physical-biogeochemical models. The objective of this work is to evaluate production CC for mussel rafts in Galician Rias as a function of mussel loads and current velocities. For this purpose an analytical model was developed and used to find conditions that maximize raft production. Obtained results suggest that CC at the raft scale has not been exceeded by current culture practices. However, it does not seem advisable to increase mussel loads per raft. Therefore, any possible increase in mussel production should be considered at a higher spatial scale. |
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Modelling Local Food Depletion Effects in Mussel Rafts of Galician RiasCarrying capacityMussel raftsMathematical modellingMytilus galloprovincialisMollusc culture is one of the most important types of mariculture, with suspension feeding bivalves being among the most cultivated organisms. In the last years, there has been a growing concern about carrying capacity (CC) of natural ecosystems for bivalve culture, because of decreases in growth rates and mass mortalities due to overstocking. Several methods have been proposed for CC estimation. The simplest are based on average properties integrated over various time scales, like water renewal rate, phytoplankton primary production and bivalve clearance rate. If the time scale of the former two processes is larger than the time scale for bivalve filtration than, bivalve standing stock is over ecosystem CC. More complex approaches are based on ecosystem box modelling or coupled physical-biogeochemical models. The objective of this work is to evaluate production CC for mussel rafts in Galician Rias as a function of mussel loads and current velocities. For this purpose an analytical model was developed and used to find conditions that maximize raft production. Obtained results suggest that CC at the raft scale has not been exceeded by current culture practices. However, it does not seem advisable to increase mussel loads per raft. Therefore, any possible increase in mussel production should be considered at a higher spatial scale.ElsevieryesRepositório Institucional da Universidade Fernando PessoaDuarte, PedroLabarta, UxioFernández-Reiriz, Maria José2008-10-17T14:37:11Z2007-01-01T00:00:00Z2007-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10284/835engAquaculture. 0044-8486. Volume 274, Issues 2-4 (2008) 300-312.0044-8486info: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:RCAAP2022-09-06T02:00:19Zoai:bdigital.ufp.pt:10284/835Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:38:09.855819Repositório 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 |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
title |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
spellingShingle |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias Duarte, Pedro Carrying capacity Mussel rafts Mathematical modelling Mytilus galloprovincialis |
title_short |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
title_full |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
title_fullStr |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
title_full_unstemmed |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
title_sort |
Modelling Local Food Depletion Effects in Mussel Rafts of Galician Rias |
author |
Duarte, Pedro |
author_facet |
Duarte, Pedro Labarta, Uxio Fernández-Reiriz, Maria José |
author_role |
author |
author2 |
Labarta, Uxio Fernández-Reiriz, Maria José |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
yes Repositório Institucional da Universidade Fernando Pessoa |
dc.contributor.author.fl_str_mv |
Duarte, Pedro Labarta, Uxio Fernández-Reiriz, Maria José |
dc.subject.por.fl_str_mv |
Carrying capacity Mussel rafts Mathematical modelling Mytilus galloprovincialis |
topic |
Carrying capacity Mussel rafts Mathematical modelling Mytilus galloprovincialis |
description |
Mollusc culture is one of the most important types of mariculture, with suspension feeding bivalves being among the most cultivated organisms. In the last years, there has been a growing concern about carrying capacity (CC) of natural ecosystems for bivalve culture, because of decreases in growth rates and mass mortalities due to overstocking. Several methods have been proposed for CC estimation. The simplest are based on average properties integrated over various time scales, like water renewal rate, phytoplankton primary production and bivalve clearance rate. If the time scale of the former two processes is larger than the time scale for bivalve filtration than, bivalve standing stock is over ecosystem CC. More complex approaches are based on ecosystem box modelling or coupled physical-biogeochemical models. The objective of this work is to evaluate production CC for mussel rafts in Galician Rias as a function of mussel loads and current velocities. For this purpose an analytical model was developed and used to find conditions that maximize raft production. Obtained results suggest that CC at the raft scale has not been exceeded by current culture practices. However, it does not seem advisable to increase mussel loads per raft. Therefore, any possible increase in mussel production should be considered at a higher spatial scale. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-01-01T00:00:00Z 2007-01-01T00:00:00Z 2008-10-17T14:37:11Z |
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/10284/835 |
url |
http://hdl.handle.net/10284/835 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Aquaculture. 0044-8486. Volume 274, Issues 2-4 (2008) 300-312. 0044-8486 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799130244265803776 |