Determination of Some Population Parameters and Reproduction Period of Whiting (Merlangius merlangus euxinus Nordmann, 1840) on the Trabzon-Yomra Coast in the Eastern Black Sea

Authors : Erhan ÇİLOĞLU, Cemalettin ŞAHİN

Pages : 831-837

View : 25 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this study, the growth, age composition, sex ratio, condition factor and spawning period of whiting insert ignore into journalissuearticles values(Merlangius merlangus euxinus Nordmann, 1840); on the eastern part of the Trabzon-Yomra coast were investigated. During the study, a total of 1730 fish insert ignore into journalissuearticles values(1122 females and 608 males); ranging in age from group I to IX were examined. The chi squared test was used to calculate ratios between female and male specimens and no significant difference was found insert ignore into journalissuearticles values(P>0.05);, and the relative growth length and the relative growth weight differences between females and males were not found to be statistically significant insert ignore into journalissuearticles values(P>0.05);. The calculated length-weight relationships for females and males are as follows, respectively: W=0.0037L3.259, W=0.0042L3.206. Von Bertalanffy growth constants were estimated to be L\infity=52.500 cm, K=0.092, t0=-1.759 for females and L\infity=37.190 cm, K=0.114, t0=-2.390 for males. The results of this investigation show that reproduction takes place throughout the year with a peak from January to August and fish reach sexual maturity at age I.
Keywords : Trabzon Yomra coasts, Whiting Merlangius merlangus euxinus, Growth, Condition Factor, Spawning