Geographic variability of sardine dynamics in the Iberian Biscay region
The spatio-temporal variability in the distribution, demographic structure, recruitment, and mortality of sardine within the Iberian Biscay region is described using area-disaggregated data collected during acoustic surveys and at ports since the mid-1980s. Multiple regression models were used to de...
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Centro Oceanográfico de Vigo
2009
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Online Access: | http://hdl.handle.net/10508/7737 https://doi.org/10.1093/icesjms/fsn225 |
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ftieo:oai:repositorio.ieo.es:10508/7737 2023-05-15T17:41:33+02:00 Geographic variability of sardine dynamics in the Iberian Biscay region Silva, A. (Alexandra) Skagen, D. (Dankert) Uriarte, A. (Andrés) Massé, J. (Jacques) Santos, M.B. (María Begoña) Marques, V. (Vitor) Carrera, P. (Pablo) Beillois, P. (Pierre) Pestana, G. (Graça) Porteiro-Lago, C. (Carmen) Atlantic Ocean Eastern Atlantic Northeast Atlantic Iberian waters 2009 http://hdl.handle.net/10508/7737 https://doi.org/10.1093/icesjms/fsn225 unknown Centro Oceanográfico de Vigo http://icesjms.oxfordjournals.org/content/66/3/495.abstract?sid=dac47477-4e1d-411c-85a7-8d583b11753d http://hdl.handle.net/10508/7737 ICES Journal Of Marine Science, 66 (3). 2009: 495-508 doi:10.1093/icesjms/fsn225 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND Iberian Peninsula Population dynamics Small pelagic fish Stock structure article 2009 ftieo https://doi.org/10.1093/icesjms/fsn225 2022-08-30T23:47:10Z The spatio-temporal variability in the distribution, demographic structure, recruitment, and mortality of sardine within the Iberian Biscay region is described using area-disaggregated data collected during acoustic surveys and at ports since the mid-1980s. Multiple regression models were used to describe log numbers-at-age obtained annually in ten areas covered by three surveys to test the existence of geographic differences in selectivity-at-age, recruitment strength, and mortality and to infer plausible migration routes. Within Iberian waters, sardine biomass was mainly concentrated off western Portugal and the Gulf of Cadiz. In the Bay of Biscay, biomass levels were comparable with those off western Portugal. Recruitment was localized in a few areas (northern Portugal and the Gulf of Cadiz and Bay of Biscay), intermingling with areas dominated by older fish. Recruitment was generally asynchronous among areas, although some recruitment peaks were noticeable across wider regions. Spatial patterns related to strong and weak year classes and year-class slopes were also noted. Clearly distinct dynamics were not evidenced within the Atlanto–Iberian sardine stock area, but the validity of the northern limit was questioned by the connection between sardine dynamics in the Bay of Biscay and the Cantabrian Sea. The results provided some evidence consistent with the hypothesis of sardine movement from recruiting grounds to areas farther along the coast as they grow. 2 Article in Journal/Newspaper Northeast Atlantic Instituto Español de Oceanografía: e-IEO ICES Journal of Marine Science 66 3 495 508 |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
unknown |
topic |
Iberian Peninsula Population dynamics Small pelagic fish Stock structure |
spellingShingle |
Iberian Peninsula Population dynamics Small pelagic fish Stock structure Silva, A. (Alexandra) Skagen, D. (Dankert) Uriarte, A. (Andrés) Massé, J. (Jacques) Santos, M.B. (María Begoña) Marques, V. (Vitor) Carrera, P. (Pablo) Beillois, P. (Pierre) Pestana, G. (Graça) Porteiro-Lago, C. (Carmen) Geographic variability of sardine dynamics in the Iberian Biscay region |
topic_facet |
Iberian Peninsula Population dynamics Small pelagic fish Stock structure |
description |
The spatio-temporal variability in the distribution, demographic structure, recruitment, and mortality of sardine within the Iberian Biscay region is described using area-disaggregated data collected during acoustic surveys and at ports since the mid-1980s. Multiple regression models were used to describe log numbers-at-age obtained annually in ten areas covered by three surveys to test the existence of geographic differences in selectivity-at-age, recruitment strength, and mortality and to infer plausible migration routes. Within Iberian waters, sardine biomass was mainly concentrated off western Portugal and the Gulf of Cadiz. In the Bay of Biscay, biomass levels were comparable with those off western Portugal. Recruitment was localized in a few areas (northern Portugal and the Gulf of Cadiz and Bay of Biscay), intermingling with areas dominated by older fish. Recruitment was generally asynchronous among areas, although some recruitment peaks were noticeable across wider regions. Spatial patterns related to strong and weak year classes and year-class slopes were also noted. Clearly distinct dynamics were not evidenced within the Atlanto–Iberian sardine stock area, but the validity of the northern limit was questioned by the connection between sardine dynamics in the Bay of Biscay and the Cantabrian Sea. The results provided some evidence consistent with the hypothesis of sardine movement from recruiting grounds to areas farther along the coast as they grow. 2 |
format |
Article in Journal/Newspaper |
author |
Silva, A. (Alexandra) Skagen, D. (Dankert) Uriarte, A. (Andrés) Massé, J. (Jacques) Santos, M.B. (María Begoña) Marques, V. (Vitor) Carrera, P. (Pablo) Beillois, P. (Pierre) Pestana, G. (Graça) Porteiro-Lago, C. (Carmen) |
author_facet |
Silva, A. (Alexandra) Skagen, D. (Dankert) Uriarte, A. (Andrés) Massé, J. (Jacques) Santos, M.B. (María Begoña) Marques, V. (Vitor) Carrera, P. (Pablo) Beillois, P. (Pierre) Pestana, G. (Graça) Porteiro-Lago, C. (Carmen) |
author_sort |
Silva, A. (Alexandra) |
title |
Geographic variability of sardine dynamics in the Iberian Biscay region |
title_short |
Geographic variability of sardine dynamics in the Iberian Biscay region |
title_full |
Geographic variability of sardine dynamics in the Iberian Biscay region |
title_fullStr |
Geographic variability of sardine dynamics in the Iberian Biscay region |
title_full_unstemmed |
Geographic variability of sardine dynamics in the Iberian Biscay region |
title_sort |
geographic variability of sardine dynamics in the iberian biscay region |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2009 |
url |
http://hdl.handle.net/10508/7737 https://doi.org/10.1093/icesjms/fsn225 |
op_coverage |
Atlantic Ocean Eastern Atlantic Northeast Atlantic Iberian waters |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
http://icesjms.oxfordjournals.org/content/66/3/495.abstract?sid=dac47477-4e1d-411c-85a7-8d583b11753d http://hdl.handle.net/10508/7737 ICES Journal Of Marine Science, 66 (3). 2009: 495-508 doi:10.1093/icesjms/fsn225 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1093/icesjms/fsn225 |
container_title |
ICES Journal of Marine Science |
container_volume |
66 |
container_issue |
3 |
container_start_page |
495 |
op_container_end_page |
508 |
_version_ |
1766143180276760576 |