Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage

Detalhes bibliográficos
Autor(a) principal: Beldade, Manuel Ricardo do Ó de Oliveira
Data de Publicação: 2005
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/285
Resumo: The population dynamics of criptobentic fishes in the Arrábida Marine Park was investigated. The fluctuations in composition and abundance, the duration of the pelagic phase and the choice of settlement habitats were assessed. A new non-destructive technique to count cryptobenthic fishes was tested. To study the larval phase we sampled the shallow rocky subtidal where we found mostly cryptobenthic species. Some of these species remain close to shore throughout the entire pelagic phase, e.g. Pomatoschistus pictus. The duration of the period spent in the plankton is variable within the cryptobenthic fishes but there are some, such as the Gobiesocidae, that spend very short periods as larvae. Lepadogaster lepadogaster settlers occur in higher abundances in high complexity habitats. An interference visual technique was described, tested and used to describe the composition of the cryptobenthic assemblage and assess its spatio-temporal variation. Several species use a restricted number of habitats (e.g. Gobius xanthocephalus and Tripterygion delaisi), whereas only one used all habitats available, Parablennius pilicornis. Moreover, the habitat utilization changed seasonally. Diversity and abundance of the cryptobenthic assemblage remained stable during two years and a consistent seasonal trend was observed. The peek in abundance coincided with the arrival of recruits, in the autumn, but there was a clear decrease in abundance in the subsequent seasons. The population dynamics of cryptobenthic fishes seems to be structured by post-settlement processes and can be understood by the particular ecological features displayed throughout their life-cycle.
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spelling Patterns and processes of variation of a rocky bottom cryptobethic fish assemblageEcologia marinhaPeixes criptobênticosCiclo de vidaDinâmica populacionalThe population dynamics of criptobentic fishes in the Arrábida Marine Park was investigated. The fluctuations in composition and abundance, the duration of the pelagic phase and the choice of settlement habitats were assessed. A new non-destructive technique to count cryptobenthic fishes was tested. To study the larval phase we sampled the shallow rocky subtidal where we found mostly cryptobenthic species. Some of these species remain close to shore throughout the entire pelagic phase, e.g. Pomatoschistus pictus. The duration of the period spent in the plankton is variable within the cryptobenthic fishes but there are some, such as the Gobiesocidae, that spend very short periods as larvae. Lepadogaster lepadogaster settlers occur in higher abundances in high complexity habitats. An interference visual technique was described, tested and used to describe the composition of the cryptobenthic assemblage and assess its spatio-temporal variation. Several species use a restricted number of habitats (e.g. Gobius xanthocephalus and Tripterygion delaisi), whereas only one used all habitats available, Parablennius pilicornis. Moreover, the habitat utilization changed seasonally. Diversity and abundance of the cryptobenthic assemblage remained stable during two years and a consistent seasonal trend was observed. The peek in abundance coincided with the arrival of recruits, in the autumn, but there was a clear decrease in abundance in the subsequent seasons. The population dynamics of cryptobenthic fishes seems to be structured by post-settlement processes and can be understood by the particular ecological features displayed throughout their life-cycle.Gonçalves, EmanuelErzini, KarimSapientiaBeldade, Manuel Ricardo do Ó de Oliveira2011-09-07T16:04:20Z20052005-01-01T00:00:00Zdoctoral thesisinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10400.1/285enginfo: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:RCAAP2024-11-29T10:49:00Zoai:sapientia.ualg.pt:10400.1/285Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-11-29T10:49Repositório 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 Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
title Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
spellingShingle Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
Beldade, Manuel Ricardo do Ó de Oliveira
Ecologia marinha
Peixes criptobênticos
Ciclo de vida
Dinâmica populacional
title_short Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
title_full Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
title_fullStr Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
title_full_unstemmed Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
title_sort Patterns and processes of variation of a rocky bottom cryptobethic fish assemblage
author Beldade, Manuel Ricardo do Ó de Oliveira
author_facet Beldade, Manuel Ricardo do Ó de Oliveira
author_role author
dc.contributor.none.fl_str_mv Gonçalves, Emanuel
Erzini, Karim
Sapientia
dc.contributor.author.fl_str_mv Beldade, Manuel Ricardo do Ó de Oliveira
dc.subject.por.fl_str_mv Ecologia marinha
Peixes criptobênticos
Ciclo de vida
Dinâmica populacional
topic Ecologia marinha
Peixes criptobênticos
Ciclo de vida
Dinâmica populacional
description The population dynamics of criptobentic fishes in the Arrábida Marine Park was investigated. The fluctuations in composition and abundance, the duration of the pelagic phase and the choice of settlement habitats were assessed. A new non-destructive technique to count cryptobenthic fishes was tested. To study the larval phase we sampled the shallow rocky subtidal where we found mostly cryptobenthic species. Some of these species remain close to shore throughout the entire pelagic phase, e.g. Pomatoschistus pictus. The duration of the period spent in the plankton is variable within the cryptobenthic fishes but there are some, such as the Gobiesocidae, that spend very short periods as larvae. Lepadogaster lepadogaster settlers occur in higher abundances in high complexity habitats. An interference visual technique was described, tested and used to describe the composition of the cryptobenthic assemblage and assess its spatio-temporal variation. Several species use a restricted number of habitats (e.g. Gobius xanthocephalus and Tripterygion delaisi), whereas only one used all habitats available, Parablennius pilicornis. Moreover, the habitat utilization changed seasonally. Diversity and abundance of the cryptobenthic assemblage remained stable during two years and a consistent seasonal trend was observed. The peek in abundance coincided with the arrival of recruits, in the autumn, but there was a clear decrease in abundance in the subsequent seasons. The population dynamics of cryptobenthic fishes seems to be structured by post-settlement processes and can be understood by the particular ecological features displayed throughout their life-cycle.
publishDate 2005
dc.date.none.fl_str_mv 2005
2005-01-01T00:00:00Z
2011-09-07T16:04:20Z
dc.type.driver.fl_str_mv doctoral thesis
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.1/285
url http://hdl.handle.net/10400.1/285
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 mluisa.alvim@gmail.com
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