Comparison of demersal fish assemblages in three areas of the Strait of Sicily under different trawling pressure

The effect of trawling on demersal fish assemblages was measured in an experiment involving repeated trawling in the Strait of Sicily. Three areas were chosen according to their exploitation level by commercial trawl fishery: practically unexploited by the commercial fishery (area C), subject to lig...

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Veröffentlicht in:Fisheries research 2006-10, Vol.81 (1), p.60-71
Hauptverfasser: Gristina, M., Bahri, T., Fiorentino, F., Garofalo, G.
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container_title Fisheries research
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creator Gristina, M.
Bahri, T.
Fiorentino, F.
Garofalo, G.
description The effect of trawling on demersal fish assemblages was measured in an experiment involving repeated trawling in the Strait of Sicily. Three areas were chosen according to their exploitation level by commercial trawl fishery: practically unexploited by the commercial fishery (area C), subject to light and recent fishing pressure (area L) and heavily exploited by commercial trawl fishery (area H). Data were collected during two scientific surveys carried out in autumn 1997 and 1998; temporal replication was used to confirm the observed spatial pattern. The status of the demersal fish communities in the three areas was compared using a variety of approaches and a number of community metrics (cluster analysis, similarity percentage analysis, ANOSIM pairwise test, size spectra, diversity indices). Results indicate that abundance, species composition and size-structure of the fish community in area H are different from the other two areas. Differences between area C and area L are small and concern mainly the relative abundance of some species. Eventually, the results show how fishing can substantially shape the fish communities in the three areas.
doi_str_mv 10.1016/j.fishres.2006.05.010
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subjects Agnatha. Pisces
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)
Fish community structure
Fundamental and applied biological sciences. Psychology
Marine
Pisces
Strait of Sicily
Trawl fishing impact
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
title Comparison of demersal fish assemblages in three areas of the Strait of Sicily under different trawling pressure
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