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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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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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. 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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. 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Psychology</subject><subject>Marine</subject><subject>Pisces</subject><subject>Strait of Sicily</subject><subject>Trawl fishing impact</subject><subject>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</subject><issn>0165-7836</issn><issn>1872-6763</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNqFkU9rGzEQxUVoIG6Sj1DQpb3tRvLuSqtTKaZtAoEckpzFWBrZMvuvmnVLvn212JBjLhJifm_ejB5jX6QopZDq7lCGSPuEVK6FUKVoSiHFBVvJVq8LpVX1ia0y1xS6rdQV-0x0EEJoreSKTZuxnyBFGgc-Bu6xx0TQ8aUjByLstx3skHgc-Jw9kENCoIWd98if5wRxXl7P0cXujR8Hj4n7GAImHGae6_-6OOz4lOejY8IbdhmgI7w939fs9dfPl8198fj0-2Hz47FwtZBzUaHWVcDt1gsByhnTeiONy4evtQRTtxlzQaExGnzjKqMAjdTbvJcGU1XX7Nup75TGP0ek2faRHHYdDDgeyUrTKFUb9TFYa9M22mSwOYEujUQJg51S7CG9WSnsEoQ92HMQdgnCisbmILLu69kAyEEXEgwu0ru4FWotTZu57ycO87f8jZgsuYiDQx8Tutn6MX7g9B8Dl6LN</recordid><startdate>20061001</startdate><enddate>20061001</enddate><creator>Gristina, M.</creator><creator>Bahri, T.</creator><creator>Fiorentino, F.</creator><creator>Garofalo, G.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SN</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>20061001</creationdate><title>Comparison of demersal fish assemblages in three areas of the Strait of Sicily under different trawling pressure</title><author>Gristina, M. ; Bahri, T. ; Fiorentino, F. ; Garofalo, G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c401t-3e773febbd00a6c998d919cd91d471a948401cf6e997ad5c396ae917b0777a933</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Agnatha. 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Psychology</topic><topic>Marine</topic><topic>Pisces</topic><topic>Strait of Sicily</topic><topic>Trawl fishing impact</topic><topic>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gristina, M.</creatorcontrib><creatorcontrib>Bahri, T.</creatorcontrib><creatorcontrib>Fiorentino, F.</creatorcontrib><creatorcontrib>Garofalo, G.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Ecology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Fisheries research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gristina, M.</au><au>Bahri, T.</au><au>Fiorentino, F.</au><au>Garofalo, G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Comparison of demersal fish assemblages in three areas of the Strait of Sicily under different trawling pressure</atitle><jtitle>Fisheries research</jtitle><date>2006-10-01</date><risdate>2006</risdate><volume>81</volume><issue>1</issue><spage>60</spage><epage>71</epage><pages>60-71</pages><issn>0165-7836</issn><eissn>1872-6763</eissn><coden>FISRDJ</coden><abstract>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. 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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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