Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries
14 pages, 9 figures, 4 tables
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Elsevier
2004
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| Subjects: | Catch rates, Generalized linear models, Merluccius merluccius, Multivariate analysis, Northwestern Mediterranean, Recruitment trends, |
| Online Access: | http://hdl.handle.net/10261/29999 |
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dig-icm-es-10261-299992020-11-26T13:06:23Z Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries Goñi, Raquel Adlerstein, Sara Álvarez, Federico García, Mariano Sánchez, Pilar Sbrana, Mario Maynou, Francesc Viva, Claudio Catch rates Generalized linear models Merluccius merluccius Multivariate analysis Northwestern Mediterranean Recruitment trends 14 pages, 9 figures, 4 tables Temporal and spatial variation in Merluccius merluccius recruitment in the Northwest Mediterranean is examined, and recruitment indices are derived from monthly M. merluccius catch rates of four bottom-trawl fleets operating in Spanish and Italian waters during the period 1991-1999. Where M. merluccius catches were not recorded by size category, multivariate techniques were applied to species proportions in order to identify catch records most representative of recruit abundance. Selected catch rates were analysed by generalized linear models (GLMs) to estimate recruitment indices. The GLMs explain large proportions of the variation in recruit abundance (50-84%) and indicate significant annual and seasonal variation in recruitment strength. Vessel was by far the most important factor affecting catch rates of recruits, stressing the need to account for vessel characteristics when analysing commercial catch data for stock assessment. Seasonal patterns of recruitment reveal similarities among the study areas and interannual variations within areas. One major recruitment peak was identified in each area during either spring/summer or late summer/winter. In most areas, recruitment between 1991 and 1999 seemed to decline, but this could not be confirmed owing to high interannual variability. The coherence of annual fluctuations in recruitment indices with those of MEDITS surveys supports the present results The study was supported by funding provided by the European Commission, DG Fisheries, under project contract 98/053 ‘‘Factors affecting catch rates of NW Mediterranean trawl fleets and derivation of standardized abundance indices’’ Peer reviewed 2010-12-14T16:52:48Z 2010-12-14T16:52:48Z 2004 artículo http://purl.org/coar/resource_type/c_6501 ICES Journal of Marine Science 61(5): 760-773 (2004) 1054-3139 http://hdl.handle.net/10261/29999 10.1016/j.icesjms.2004.04.002 en https://doi.org/10.1016/j.icesjms.2004.04.002 none Elsevier |
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Biblioteca del ICM España |
| language |
English |
| topic |
Catch rates Generalized linear models Merluccius merluccius Multivariate analysis Northwestern Mediterranean Recruitment trends Catch rates Generalized linear models Merluccius merluccius Multivariate analysis Northwestern Mediterranean Recruitment trends |
| spellingShingle |
Catch rates Generalized linear models Merluccius merluccius Multivariate analysis Northwestern Mediterranean Recruitment trends Catch rates Generalized linear models Merluccius merluccius Multivariate analysis Northwestern Mediterranean Recruitment trends Goñi, Raquel Adlerstein, Sara Álvarez, Federico García, Mariano Sánchez, Pilar Sbrana, Mario Maynou, Francesc Viva, Claudio Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries |
| description |
14 pages, 9 figures, 4 tables |
| format |
artículo |
| topic_facet |
Catch rates Generalized linear models Merluccius merluccius Multivariate analysis Northwestern Mediterranean Recruitment trends |
| author |
Goñi, Raquel Adlerstein, Sara Álvarez, Federico García, Mariano Sánchez, Pilar Sbrana, Mario Maynou, Francesc Viva, Claudio |
| author_facet |
Goñi, Raquel Adlerstein, Sara Álvarez, Federico García, Mariano Sánchez, Pilar Sbrana, Mario Maynou, Francesc Viva, Claudio |
| author_sort |
Goñi, Raquel |
| title |
Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries |
| title_short |
Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries |
| title_full |
Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries |
| title_fullStr |
Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries |
| title_full_unstemmed |
Recruitment indices of European hake, Merluccius merluccius (Linnaeus 1758), in the Northwest Mediterranean based on landings from bottom-trawl multispecies fisheries |
| title_sort |
recruitment indices of european hake, merluccius merluccius (linnaeus 1758), in the northwest mediterranean based on landings from bottom-trawl multispecies fisheries |
| publisher |
Elsevier |
| publishDate |
2004 |
| url |
http://hdl.handle.net/10261/29999 |
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