External morphology of European seabass (Dicentrarchus labrax) related to sexual dimorphism

Authors : Deniz ÇOBAN, Şükrü YILDIRIM, H Okan KAMACI, Cüneyt SUZER, Şahin SAKA, Kürşat FIRAT

Pages : 255-263

View : 25 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The relationships among 15 morphometric measurements in 219 aliquots of European seabass insert ignore into journalissuearticles values(Dicentrarchus labrax); were examined with respect to sexual dimorphism. The ratio of females to males was determined as 1:5.1 and gonadosomatic indices insert ignore into journalissuearticles values(%); were found for males insert ignore into journalissuearticles values(2.13 ± 0.86); and females insert ignore into journalissuearticles values(3.63 ± 1.18);. There were 4 morphometric characteristics that differed between genders: ventral margin of cleithrum insert ignore into journalissuearticles values(VMC);, postanal fin length insert ignore into journalissuearticles values(post-AFL);, postdorsal fin length insert ignore into journalissuearticles values(post-DFL);, and preanal fin length insert ignore into journalissuearticles values(pre-AFL);. Although there were significant differences between morphometric characteristics insert ignore into journalissuearticles values(post-AFL, post-DFL, pre-AFL); and total length, no significant differences were found in the VMC. These average ratios were determined as pre-AFL to TL 0.61 {female}, 0.71 {male}; post-AFL to TL 0.72 {female}, 0.84 {male}; post-DFL to TL 0.68 {female}, 0.81 {male}, respectively. The aim of this study was to investigate if sexual differences could affect external morphology in cultured seabass and, additionally, to determine sexual dimorphism related to morphological differences during the maturation and spawning seasons in this species.
Keywords : Key words European seabass, Dicentrarchus labrax, external morphology, sexual dimorphism