A spatial and temporal diversity index taking into account ... - ICES

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Whitehead et al., 1984, Muus et al., 1999) ... (1984) and Muus et al. (1999) ...... M. mustelus. Smoothhound. M. LB. SS. D. V. 150. S. 8. S acanthias. Spurdog. M.
International Council for the Exploration of the Sea

ICES CM 2001/T:04 Use and Information Content of Ecosystem Metrics and Reference Points

A spatial and temporal diversity index taking into account species rarity, with an application to the North Sea fish community Niels Daan Netherlands Institute for Fisheries Research Abstract A spatial and temporal diversity index is proposed that is based on species rarity. The rarity index integrates information on relative abundance and on the relative extent of the geographical distribution. An application to the North Sea, Skagerrak and Kattegat fish community is presented on the basis of three sets of survey data (International Bottom Trawl Survey, Beam Trawl Survey and Demersal Young Fish Survey). To limit the analysis to ‘truly’ North Sea fish, 91 species were selected to define the fish community at depths

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