Yeliz Doğanyılmaz Özbilgin

Body shape and trawl cod end selectivity for nine commercial fish species

This study investigates the catch components of a commercially used demersal trawl cod end in Izmir Bay, and reveals some of the morphological characteristics of nine commercial fish species; red mullet ( Mullus barbatus ), hake ( Merluccius merluccius ), whiting ( Merlangius merlangus euxinus ), poor cod ( Trisopterus minutus capelanus ), tub gurnard ( Trigla lucerna ), common pandora ( Pagellus erythrinus ), axillary sea bream ( Pagellus acarne ), picarel ( Spicara smaris ) and annular sea bream ( Diplodus annularis ) in relation to mesh size and shapes. Furthermore selectivity of 40-mm polyethylene netting cod end for red mullet, hake, common pandora, axillary sea bream, picarel and annular sea bream is presented. The results are discussed in a way to understand the probable effects of fish body shape on mesh selectivity.