A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal
Dissertação de mestrado em Ecologia, apresentada ao Departamento de Ciências da Vida da Faculdade de Ciências da Universidade de Coimbra. Estuarine systems support the life cycle stages of commercially important marine fish and are influenced by large and local-scale climatic patterns. Also, extreme...
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ftunivcoimbra:oai:estudogeral.sib.uc.pt:10316/31216 2023-05-15T17:36:21+02:00 A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal Bento, Eduardo Manuel Castro Antunes Granja Pardal, Miguel Marinho, Filipe 2015 http://hdl.handle.net/10316/31216 eng eng BENTO, Eduardo Manuel Castro Antunes Granja - A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal. Coimbra : [s.n.], 2015. Dissertação de mestrado em Ecologia http://hdl.handle.net/10316/31216 201670976 info:eu-repo/semantics/openAccess Robalo Variações de recrutamento Alterações climáticas Estuário do Mondego Padrões de escala global info:eu-repo/semantics/masterThesis 2015 ftunivcoimbra 2022-08-11T13:58:00Z Dissertação de mestrado em Ecologia, apresentada ao Departamento de Ciências da Vida da Faculdade de Ciências da Universidade de Coimbra. Estuarine systems support the life cycle stages of commercially important marine fish and are influenced by large and local-scale climatic patterns. Also, extreme events triggered by climate changes may influence the functioning of nursery grounds and recruitment for several fish species. In this study, performed in the Mondego estuary, Portugal, we used an 11-year database (2003-2013) for analyzing the variability in the population of a marine juvenile migrant fish, the European sea bass Dicentrarchus labrax, regarding changes in abundance, population structure, growth rates and secondary production and annual day of peak abundance. Higher densities and production occurred at the beginning of the study, but no differences in 0-group growth could be observed. In order to detect change points in both biological and climatic data, the cumulative sum (CUSUM) of the deviations from the mean for the 2003-2013 period were determined for each parameter. The relationship between large- and local-scale drivers and 0-group abundance, secondary production and day of peak abundance were evaluated using a Pearson correlation analysis of CUSUM of biological and environmental data, considering the correspondent yearly values and with a time-lag of 1 year. The North Atlantic Oscillation (NAO) index, sea surface temperature (SST) and their respective winter values were tested as large-scale factors, while river runoff, salinity and water temperature were considered as local climate patterns. River runoff was the significant factor explaining D. labrax 0-group abundances and the NAO and water temperature were also significant predictors considering the 1-year lag. Regarding D. labrax 0-group secondary production, salinity and water temperature were the significant predictors. The NAO with 1 year lag was also negatively correlated with the day of peak abundance. The observed variability ... Master Thesis North Atlantic North Atlantic oscillation Universidade de Coimbra: Estudo Geral |
institution |
Open Polar |
collection |
Universidade de Coimbra: Estudo Geral |
op_collection_id |
ftunivcoimbra |
language |
English |
topic |
Robalo Variações de recrutamento Alterações climáticas Estuário do Mondego Padrões de escala global |
spellingShingle |
Robalo Variações de recrutamento Alterações climáticas Estuário do Mondego Padrões de escala global Bento, Eduardo Manuel Castro Antunes Granja A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal |
topic_facet |
Robalo Variações de recrutamento Alterações climáticas Estuário do Mondego Padrões de escala global |
description |
Dissertação de mestrado em Ecologia, apresentada ao Departamento de Ciências da Vida da Faculdade de Ciências da Universidade de Coimbra. Estuarine systems support the life cycle stages of commercially important marine fish and are influenced by large and local-scale climatic patterns. Also, extreme events triggered by climate changes may influence the functioning of nursery grounds and recruitment for several fish species. In this study, performed in the Mondego estuary, Portugal, we used an 11-year database (2003-2013) for analyzing the variability in the population of a marine juvenile migrant fish, the European sea bass Dicentrarchus labrax, regarding changes in abundance, population structure, growth rates and secondary production and annual day of peak abundance. Higher densities and production occurred at the beginning of the study, but no differences in 0-group growth could be observed. In order to detect change points in both biological and climatic data, the cumulative sum (CUSUM) of the deviations from the mean for the 2003-2013 period were determined for each parameter. The relationship between large- and local-scale drivers and 0-group abundance, secondary production and day of peak abundance were evaluated using a Pearson correlation analysis of CUSUM of biological and environmental data, considering the correspondent yearly values and with a time-lag of 1 year. The North Atlantic Oscillation (NAO) index, sea surface temperature (SST) and their respective winter values were tested as large-scale factors, while river runoff, salinity and water temperature were considered as local climate patterns. River runoff was the significant factor explaining D. labrax 0-group abundances and the NAO and water temperature were also significant predictors considering the 1-year lag. Regarding D. labrax 0-group secondary production, salinity and water temperature were the significant predictors. The NAO with 1 year lag was also negatively correlated with the day of peak abundance. The observed variability ... |
author2 |
Pardal, Miguel Marinho, Filipe |
format |
Master Thesis |
author |
Bento, Eduardo Manuel Castro Antunes Granja |
author_facet |
Bento, Eduardo Manuel Castro Antunes Granja |
author_sort |
Bento, Eduardo Manuel Castro Antunes Granja |
title |
A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal |
title_short |
A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal |
title_full |
A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal |
title_fullStr |
A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal |
title_full_unstemmed |
A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal |
title_sort |
decadal trend of juvenile european sea bass (dicentrarchus labrax, l.) responses to climate patterns in the mondego estuary, portugal |
publishDate |
2015 |
url |
http://hdl.handle.net/10316/31216 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
BENTO, Eduardo Manuel Castro Antunes Granja - A decadal trend of juvenile European sea bass (Dicentrarchus labrax, L.) responses to climate patterns in the Mondego estuary, Portugal. Coimbra : [s.n.], 2015. Dissertação de mestrado em Ecologia http://hdl.handle.net/10316/31216 201670976 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766135811393191936 |