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Role of environmental variables in structuring demersal assemblages on trawled bottoms on the Maltese continental shelf

Demersal assemblages from trawl surveys made at depths of 45-800 m in trawled areas within the 25NM Fisheries Management Zone round the Maltese Islands were related to environmental characteristics on the seabed. Depth, temperature, and mean grain size all affected the structure of the demersal assemblages but depth and temperature gradient were overall the most important in that order; while mean grain size seemed more important for relatively shallow bottoms (<80 m) than for deep ones.

Dimech M., Camilleri M., Kaiser M.J. & Schembri P.J. (2007). Role of environmental variables in structuring demersal assemblages on trawled bottoms on the Maltese continental shelf. Rapport du Congrès de la Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée 38: 463.

The full paper may be downloaded from here.

 

Demersal assemblages on deep water trawling grounds off the Maltese islands: Management implications

Data from three consecutive years of trawl surveys were used to characterise the demersal assemblages present on trawling grounds around the Maltese Islands, (Central Mediterranean) in water ranging from 85 to 800 m depth. Five different assemblages were present which seemed related to depth zones that do not coincide with those sampled in existing stock assessment programmes. It is therefore clear that the depth strata sampled in such programmes need to be revised to make them more biologically relevant and to achieve a better sampling representation of each assemblage type.

Dimech M., Camilleri M., Kaiser M.J. & Schembri P.J. (2007). Demersal assemblages on deep water trawling grounds off the Maltese islands: management implications. Rapport du Congrès de la Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée 38: 462.

The full paper may be downloaded from here.

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Last Updated: 1 December 2011

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