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Efficiency of the bottom trawl used for the Mediterranean international trawl survey (MEDITS) ArchiMer
Fiorentini, Loris; Dremiere, Pierre-yves; Leonori, Iole; Sala, Antonello; Palumbo, Vito.
The aim of the work presented in this paper was to assess the relative efficiency of the GOC 73 sampling trawl used for the Mediterranean international trawl survey programme (MEDITS) compared with that of a typical Italian commercial trawl. The latter was chosen because it is commonly used by fishermen in the central Adriatic, where the experiment was conducted, and therefore appeared as the best possible sampler of the commercial species present in those areas. Moreover, this trawl is similar to the various trawls used for the Italian national survey programme (GRUND). Four fishing trips were conducted between 1996 and 1997 in different areas and seasons to sample different species. Each trip was conducted in the same fishing area. A codend cover mounted...
Tipo: Text Palavras-chave: Efficacité du chalut; Chalut de fond; Pêche expérimentale; Technologie des engins; Chalutage; Méditerranée; Trawl efficiency; Bottom trawls; Experimental fishing; Gear research; Trawl survey; Mediterranean.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00188/29877/28359.pdf
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Escapement from the main body of the bottom trawl used for the Mediterranean international trawl survey (MEDITS) ArchiMer
Dremiere, Pierre-yves; Fiorentini, Loris; Cosimi, Giulio; Leonori, Iole; Sala, Antonello; Spagnolo, Alessandra.
Escapement through the body or under the footrope of the sampling trawl used for the Mediterranean international trawl survey programme (MEDITS) was assessed i) by means of visual observations performed with a towed operating vehicle equipped with a high-sensitivity video camera, and ii) by attaching small bags to the outside of the trawl body and under the footrope. Due to the small size of most of the individuals present in the study area and to the towing speed, fish behaviour in front of the trawl could not be frequently observed. In contrast, their behaviour was easily observed inside the net, especially upstream and inside the codend. Some species, such as horse mackerel (trachurus sp.), showed greater swimming endurance compared with others such as...
Tipo: Text Palavras-chave: Mediterranean Underwater observations Experimental fishing Bottom trawls Trawl escapement Trawl selectivity Méditerranée Observation sous marine Pêche expérimentale Chalut de fond; Echappement du chalut Sélectivité du chalut.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-860.pdf
Registros recuperados: 2
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