PUMA
Istituto di Scienze Marine     
Baino R., Leonori I., Rinelli P., Perdichizzi F. Analisi preliminare del comportamento di due reti a strascico utilizzate nelle campagne di pesca "GRUND". In: Biologia Marina Mediterranea, vol. 11 (2) pp. 711 - 715. SocietÓ Italiana di Biologia Marina, 2004.
 
 
Abstract
(English)
In the fast decades, various trawl surveys were carried out all along the Italian coasts by using the local commercial nets. The gear performances of two commerciai nets were monitored by means of acoustic equipment for more than 170 hauls. The mouth horizontal opening doubles with depth from 10 m to 600 m, while the vertical opening remains almost constant. Fishing speed changes in relation to vessel power, and it is always lower at higher depths. Moreover the descent time can vary from 5 mM to more than 30 min and can bias the biomass estimates at greater depths.
Subject fishing gear
bottom trawling
net sounders
acoustic equipment
measuring devices


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