Gonad Development and Sex Ratio of Sharptooth Catfish (Clarias gariepinus Burchell, 1822) Cultured under Laboratory Conditions

Authors : Şehriban ÇEK, Erdal YILMAZ

Pages : 35-46

View : 21 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In the present work, gonad development and sex ratio of sharptooth catfish insert ignore into journalissuearticles values(Clarias gariepinus); cultured under laboratory conditions over 365 days from hatching were investigated histologically and morphologically. The maturation stage for both males and females was detected 295 days after hatching. Five and 6 developmental stages were indicated for testis and ovaries, respectively. The developmental pattern of ovaries was categorised as the group-synchronous type. The sex ratio of the 200 sampled fish was 90:110 insert ignore into journalissuearticles values(male:female); and this difference was not significant insert ignore into journalissuearticles values(P > 0.05);. Additionally, final live mean weight of the males was higher than that of the females insert ignore into journalissuearticles values(P < 0.05);. The beginning of vitellogenesis was in April and ovarian development peaked in July. These results suggest that 1-year-old male and female C. gariepinus can be used as brood stock for seed production under standard laboratory conditions.
Keywords : Clarias gariepinus, histology, gametogenesis, morphology, sex ratio