Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf.
The distribution and abundance patterns of the two species of megrim Lepidorhombus whiffiagonis L. boscii, in ICES Divisions VIIIc and IXa, were analysed using the data provided by bottom-trawl surveys and the Spanish fishing fleet in European Atlantic waters. The consistency of year-class strengths...
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1998
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Online Access: | http://hdl.handle.net/10508/6893 http://hdl.handle.net/10261/326954 https://doi.org/10.1006/jmsc.1997.0279 |
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ftcsic:oai:digital.csic.es:10261/326954 2024-02-11T10:06:53+01:00 Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. Sánchez, Francisco Pérez-Contreras, María Nélida Landa, Jorge Atlantic Ocean Central Atlantic Eastern Central Atlantic Northern Spanish Shelf 1998 http://hdl.handle.net/10508/6893 http://hdl.handle.net/10261/326954 https://doi.org/10.1006/jmsc.1997.0279 unknown Centro Oceanográfico de Santander https://academic.oup.com/icesjms/article/55/3/494/655080 ICES Journal Of Marine Science, 55. 1998: 494-514 1054-3139 http://hdl.handle.net/10508/6893 http://hdl.handle.net/10261/326954 doi:10.1006/jmsc.1997.0279 4449 none Pesquerías Centro Oceanográfico de Santander research article 1998 ftcsic https://doi.org/10.1006/jmsc.1997.0279 2024-01-16T11:48:44Z The distribution and abundance patterns of the two species of megrim Lepidorhombus whiffiagonis L. boscii, in ICES Divisions VIIIc and IXa, were analysed using the data provided by bottom-trawl surveys and the Spanish fishing fleet in European Atlantic waters. The consistency of year-class strengths estimated over time from these surveys was taken as an indication of the reliability of the survey data to monitor megrim population abundance. Recruitment strength was, to a large extent, the main factor governing abundance found in successive years. This is due to the fact that the greater percentage of accessible biomass comprises 1, 2 and 3-year-old individuals. Four spot megrim (L. boscii) is currently the most abundant species in this zone due to the weak recruitment of L. whiffiagonis in recent years. As a consequence of these species' sexual differences in growth, there is a predominance of females in the larger-sized individuals of the population. From 4 years onwards, males show a higher mortality rate than females. No evidence of geographical migrations was found, although a bathymetric expansion occurs with age: juveniles are more stenobathic than adults are. A degree of specialization can be observed in the two species' habitats, probably due to their different feeding systems, with L. whiffiagonis occupying shallower waters. Production statistics from the Spanish fishing fleet in the north-east Atlantic show a far wider distribution of L. boscii than was indicated by data available previously. Sí Article in Journal/Newspaper North East Atlantic Digital.CSIC (Spanish National Research Council) ICES Journal of Marine Science 55 3 494 514 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Pesquerías Centro Oceanográfico de Santander |
spellingShingle |
Pesquerías Centro Oceanográfico de Santander Sánchez, Francisco Pérez-Contreras, María Nélida Landa, Jorge Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. |
topic_facet |
Pesquerías Centro Oceanográfico de Santander |
description |
The distribution and abundance patterns of the two species of megrim Lepidorhombus whiffiagonis L. boscii, in ICES Divisions VIIIc and IXa, were analysed using the data provided by bottom-trawl surveys and the Spanish fishing fleet in European Atlantic waters. The consistency of year-class strengths estimated over time from these surveys was taken as an indication of the reliability of the survey data to monitor megrim population abundance. Recruitment strength was, to a large extent, the main factor governing abundance found in successive years. This is due to the fact that the greater percentage of accessible biomass comprises 1, 2 and 3-year-old individuals. Four spot megrim (L. boscii) is currently the most abundant species in this zone due to the weak recruitment of L. whiffiagonis in recent years. As a consequence of these species' sexual differences in growth, there is a predominance of females in the larger-sized individuals of the population. From 4 years onwards, males show a higher mortality rate than females. No evidence of geographical migrations was found, although a bathymetric expansion occurs with age: juveniles are more stenobathic than adults are. A degree of specialization can be observed in the two species' habitats, probably due to their different feeding systems, with L. whiffiagonis occupying shallower waters. Production statistics from the Spanish fishing fleet in the north-east Atlantic show a far wider distribution of L. boscii than was indicated by data available previously. Sí |
format |
Article in Journal/Newspaper |
author |
Sánchez, Francisco Pérez-Contreras, María Nélida Landa, Jorge |
author_facet |
Sánchez, Francisco Pérez-Contreras, María Nélida Landa, Jorge |
author_sort |
Sánchez, Francisco |
title |
Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. |
title_short |
Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. |
title_full |
Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. |
title_fullStr |
Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. |
title_full_unstemmed |
Distribution and abundance of megrim (Lepidorhombus boscii and Lepidorhombus whiffiagonis) in the northern Spanish shelf. |
title_sort |
distribution and abundance of megrim (lepidorhombus boscii and lepidorhombus whiffiagonis) in the northern spanish shelf. |
publishDate |
1998 |
url |
http://hdl.handle.net/10508/6893 http://hdl.handle.net/10261/326954 https://doi.org/10.1006/jmsc.1997.0279 |
op_coverage |
Atlantic Ocean Central Atlantic Eastern Central Atlantic Northern Spanish Shelf |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
Centro Oceanográfico de Santander https://academic.oup.com/icesjms/article/55/3/494/655080 ICES Journal Of Marine Science, 55. 1998: 494-514 1054-3139 http://hdl.handle.net/10508/6893 http://hdl.handle.net/10261/326954 doi:10.1006/jmsc.1997.0279 4449 |
op_rights |
none |
op_doi |
https://doi.org/10.1006/jmsc.1997.0279 |
container_title |
ICES Journal of Marine Science |
container_volume |
55 |
container_issue |
3 |
container_start_page |
494 |
op_container_end_page |
514 |
_version_ |
1790604915475742720 |