Recruitement of sole stocks, Solea solea (L.), in the northeast Atlantic
Rijnsdorp, A.D.; Van Beek, F.A.; Flatman, S.; Millner, R.M.; Riley, J.D.; Giret, M.; De Clerck, R. (1992). Recruitement of sole stocks, Solea solea (L.), in the northeast Atlantic. Neth. J. Sea Res. 29(1-3): 173-192
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, meer
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| Auteurs | | Top |
- Rijnsdorp, A.D., meer
- Van Beek, F.A.
- Flatman, S.
- Millner, R.M.
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- Riley, J.D.
- Giret, M.
- De Clerck, R., meer
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| Abstract |
The level of recruitment and its variability were analysed in sole stocks using results of virtual population analysis (VPA) of commercial landings and pre-recruit surveys. Stocks were studied in the North Sea, eastern and western English Channel, Bristol Channel and the Irish Sea. Variability of recruitment increased from 34-55% in the central areas to 97-127% in the northern ones: the Irish Sea and the North Sea. Winter temperatures explained part of the additional variability in recruitment in the North Sea but not in the Irish Sea. In the North Sea level of recruitment appeared to be determined before the end of the first year of life, although additional mortality of older fish during cold winters may further reduce recruitment. In general there was no similarity in the pattern of recruitment variability between populations, except in adjacent populations, suggesting that the factors determining recruitment differ substantially over rather small distances. The level of recruitment in the five populations was related to the surface area of the nursery grounds. |
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