Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns
Autor(a) principal: | |
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Data de Publicação: | 2008 |
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/10316/13102 |
Resumo: | Mudflats are an important component of estuaries, where they may occupy large areas and provide feeding and nursery grounds for many fish and bird species, as in the Tagus estuary. However, knowledge on their role and functioning is still expanding. Spatial and temporal dynamics of nekton assemblages in a mudflat of the Tagus estuary were evaluated to determine their role in the estuarine functioning. Feeding activity and daily rations of the most important nekton species are also analyzed. Two intertidal mudflat areas (upper and lower) were sampled, as well as the adjoining subtidal area. Sampling was conducted every two months, during a yearly cycle. A 24 h sampling cycle was conducted to investigate daily feeding patterns and determine daily rations. Crangon crangon, Carcinus maenas, Palaemon longirostris, Palaemon serratus and Pomatoschistus microps dominated the nekton community. A marked seasonal pattern was noticed with the highest densities recorded in spring and summer, corresponding to recruitment episodes of these species. Highest biomass values were recorded in the subtidal zone, while the highest densities were recorded in the intertidal zone. The mudflats seem to play an important role in the dynamics of the Tagus estuary, acting as a feeding and nursery areas for several nektonic species |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patternsComunidades nectónicas en substratos fangosos del estuario del Tajo (Portugal): distribución y pautas alimenticiasNektonCommunity structureDaily rationsMudflatIntertidal areasTagus estuaryEstructura comunitariaRación diariaFondos fangososIntermarealEstuario del TajoMudflats are an important component of estuaries, where they may occupy large areas and provide feeding and nursery grounds for many fish and bird species, as in the Tagus estuary. However, knowledge on their role and functioning is still expanding. Spatial and temporal dynamics of nekton assemblages in a mudflat of the Tagus estuary were evaluated to determine their role in the estuarine functioning. Feeding activity and daily rations of the most important nekton species are also analyzed. Two intertidal mudflat areas (upper and lower) were sampled, as well as the adjoining subtidal area. Sampling was conducted every two months, during a yearly cycle. A 24 h sampling cycle was conducted to investigate daily feeding patterns and determine daily rations. Crangon crangon, Carcinus maenas, Palaemon longirostris, Palaemon serratus and Pomatoschistus microps dominated the nekton community. A marked seasonal pattern was noticed with the highest densities recorded in spring and summer, corresponding to recruitment episodes of these species. Highest biomass values were recorded in the subtidal zone, while the highest densities were recorded in the intertidal zone. The mudflats seem to play an important role in the dynamics of the Tagus estuary, acting as a feeding and nursery areas for several nektonic speciesLos substratos fangosos son componentes importantes de los estuarios, donde pueden ocupar amplias zonas y proporcionar alimento a las áreas de nursery de muchos peces y aves, como en el estuario de Tagus. Sin embargo, el conocimiento sobre su papel y funcionamiento es aún escaso. Se estudiaron la dinámica espacial y temporal de las comunidades bentónicas en una zona fangosa del estuario de Tagus, determinando su papel en el funcionamiento del estuario. Asimismo, se analizó la actividad alimenticia y las raciones diarias de las especies principales del nekton. Se muestrearon dos áreas fangosas intermareales (superior e inferior), así como las zonas submareales adyacentes. Los muestreos se realizaron cada dos meses durante un año. Se realizó un ciclo de 24 h para investigar las pautas alimenticias y determinar la ración diaria. Crangon crangon, Carcinus maenas, Palaemon longirostris, Palaemon serratus y Pomatoschistus microps dominan la comunidad nectónica. Se observa una pauta estacional clara, con las densidades más altas en primavera y verano, que corresponden a los episodios de reclutamiento de las especies mencionadas. Las biomasas más elevadas se obtuvieron en la zona submareal, mientras las densidades mayores se midieron en el intermareal. Los fondos fangosos del estuario de Tagus parecen jugar un papel importante en su dinámica, actuado como áreas de alimento y nursery de diversas especies nectónicasConsejo Superior de Investigaciones Científicas2008-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/13102http://hdl.handle.net/10316/13102engScientia Marina. 72:3 (2008) 591-6020214-8358França, SusanaPardal, Miguel A.Cabral, Henrique A.info: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:RCAAP2021-10-07T11:47:11Zoai:estudogeral.uc.pt:10316/13102Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:55:53.961927Repositório 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 |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns Comunidades nectónicas en substratos fangosos del estuario del Tajo (Portugal): distribución y pautas alimenticias |
title |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns |
spellingShingle |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns França, Susana Nekton Community structure Daily rations Mudflat Intertidal areas Tagus estuary Estructura comunitaria Ración diaria Fondos fangosos Intermareal Estuario del Tajo |
title_short |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns |
title_full |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns |
title_fullStr |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns |
title_full_unstemmed |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns |
title_sort |
Mudflat nekton assemblages in the Tagus estuary (Portugal): distribution and feeding patterns |
author |
França, Susana |
author_facet |
França, Susana Pardal, Miguel A. Cabral, Henrique A. |
author_role |
author |
author2 |
Pardal, Miguel A. Cabral, Henrique A. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
França, Susana Pardal, Miguel A. Cabral, Henrique A. |
dc.subject.por.fl_str_mv |
Nekton Community structure Daily rations Mudflat Intertidal areas Tagus estuary Estructura comunitaria Ración diaria Fondos fangosos Intermareal Estuario del Tajo |
topic |
Nekton Community structure Daily rations Mudflat Intertidal areas Tagus estuary Estructura comunitaria Ración diaria Fondos fangosos Intermareal Estuario del Tajo |
description |
Mudflats are an important component of estuaries, where they may occupy large areas and provide feeding and nursery grounds for many fish and bird species, as in the Tagus estuary. However, knowledge on their role and functioning is still expanding. Spatial and temporal dynamics of nekton assemblages in a mudflat of the Tagus estuary were evaluated to determine their role in the estuarine functioning. Feeding activity and daily rations of the most important nekton species are also analyzed. Two intertidal mudflat areas (upper and lower) were sampled, as well as the adjoining subtidal area. Sampling was conducted every two months, during a yearly cycle. A 24 h sampling cycle was conducted to investigate daily feeding patterns and determine daily rations. Crangon crangon, Carcinus maenas, Palaemon longirostris, Palaemon serratus and Pomatoschistus microps dominated the nekton community. A marked seasonal pattern was noticed with the highest densities recorded in spring and summer, corresponding to recruitment episodes of these species. Highest biomass values were recorded in the subtidal zone, while the highest densities were recorded in the intertidal zone. The mudflats seem to play an important role in the dynamics of the Tagus estuary, acting as a feeding and nursery areas for several nektonic species |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-09 |
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/10316/13102 http://hdl.handle.net/10316/13102 |
url |
http://hdl.handle.net/10316/13102 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Scientia Marina. 72:3 (2008) 591-602 0214-8358 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas |
publisher.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas |
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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1817552766033199104 |