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ICES Journal of Marine Science: Journal du Conseil 2005 62(3):380-383; doi:10.1016/j.icesjms.2004.11.007
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© 2004 International Council for the Exploration of the Sea

Assessing the impact of fisheries on demersal fish assemblages of the Mauritanian continental shelf, 1987–1999, using dominance curves

Didier Jouffrea,* and Cheikh A. Inejihb

a IRD, Centre de Recherche Halieutique Méditerranéenne et Tropicale Rue Jean Monnet, BP 171, 34203, Sète Cedex, France
b Institut Mauritanien de Recherche Océanographique et des Pêches (IMROP) BP 22, Nouadhibou, Mauritania

*Correspondence to D. Jouffre: tel: +33 499 573254; fax: +33 499 573295. e-mail: jouffre{at}ird.fr.

The assemblages of demersal fish and associated species of the Mauritanian continental shelf are characterized on the basis of annual trawl surveys conducted during the period 1987–1999. Species composition is dominated by exploited species (Dentex spp., Pagellus bellottii, and Octopus vulgaris). Dominance curves (Abundance Biomass Comparison plots) were used to evaluate the impact of fisheries, which have increased in magnitude over several decades. The diagnosis of a "stressed" assemblage seems to converge with the results of a similar study conducted off Senegal, but here there was no trend in impact during the period of study. The sensitivity of the present results to the various ways of considering the available taxonomic information is also analysed.

Keywords: community structure, dominance curves, fisheries impact, marine fish, West Africa

Received 1 April 2004; accepted 25 October 2004.


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