Catch and selectivity of 40 and 44 mm trammel nets in small-scale fisheries in the Antalya Bay, Eastern Mediterranean Antalya Körfezinde (Doğu Akdeniz) küçük ölçekli balikçilikta kullanilan 40 ve 44 mm fanyali uzatma ağlarinin av ve seçiciliği

The study was carried out between May and June 2012 in a coastal area with 10-55 m depth in the Antalya Bay. Size selectivity of two trammel nets (40 mm and 44 mm) was studied for three important targeted species (Pagellus acarne, Pagellus erythrinus and Mullus barbatus). The ANOVA test and the Kolmogorov-Smirnov test indicated the mean length and length frequency distribution by pairwise comparisons between different mesh sizes, which were significantly different for each species. Four uni-modal (normal scale, normal location, gamma and log-normal) and single bi-modal (bi-normal) models were fitted to the data. The bi-modal model selectivity curve gave the best fit for the trammel nets data. A clear difference was found in catching efficiency. The higher economical catch rate was obtained with a mesh size of 40 mm, while the 44 mm mesh caught more discard species than other. For red mullet, common pandora, and axillary sea bream, modal lengths in the 40 and 44 mm mesh sizes, using the bi-modal model were, 17.0 and 18.7, 13.9 and 15.3, 15.7 and 17.5 cm, respectively.