The dominant fish fauna in the North Sea and its determination
Identifieur interne : 002256 ( Main/Merge ); précédent : 002255; suivant : 002257The dominant fish fauna in the North Sea and its determination
Auteurs : Yang Jiming [Royaume-Uni]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 1982-06.
Abstract
The 224 species of fish reported from the North Sea are regarded as being composed of elements of three faunas—Boreal, Lusitanian and Atlantic, and they can be grouped accordingly on both a number of species and a biomass basis. The estimation of biomass of more than 10 important species is based on stock estimates obtained from population data. For 65 non‐standard species the estimate is based on a comparison of catch rates for 'standard’and non‐standard species from groundfish survey data. This involves assumption about the relative catchability of different sets of species. For the other species the biomass are computed in different ways. An analysis of the dominant fish fauna in the North Sea is attempted. The fish fauna in the area is analysed in two ways: by the conventional total number of species from each zoogeographic area, and by the biomass of the representatives of each fauna. It is concluded that for establishing the dominant faunal element of fish, biomass is a better index than is the number of species. The dominant faunal element of fish in the North Sea is Boreal.
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DOI: 10.1111/j.1095-8649.1982.tb03973.x
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