Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6385692 | Fisheries Research | 2015 | 8 Pages |
Abstract
Experimental fishing trials were carried out on an Italian commercial vessel to test gillnets of different monofilament diameters targeting common sole (Solea solea). The gillnets only differed in the nominal monofilament diameter: 0.18, 0.20, 0.22, 0.25, and 0.30Â mm. The nominal mesh size (stretched) was 72Â mm. A total of 47 taxa were caught. The mean number of species caught with 0.30Â mm monofilament was significantly lower than those obtained with the three thinnest diameters. Total number, number of commercial and discard of non-commercial species significantly decreased with the increase of monofilament diameter. The number of common sole and tub gurnard caught was not statistically different amongst diameters. No statistical differences were observed for the length-frequency distributions of common sole and tub gurnard caught with the different monofilament diameters. The analysis of the mechanism of capture for the common sole showed that for all diameters the main type of retention was snagging, and the percentage of individuals retained in such way decreased with the increase of diameters, while an opposite trend was observed for the common sole that were gilled. Monofilament thickness had a substantial effect upon the catch rates of the gillnets.
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Authors
Fabio Grati, Luca Bolognini, Filippo Domenichetti, Gianna Fabi, Piero Polidori, Angela Santelli, Giuseppe Scarcella, Alessandra Spagnolo,