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Online ISSN : 2349-8080 Issues : 12 per year Publisher : Excellent Publishers Email : editorinchiefijcrbp@gmail.com |
A feeding trial was conducted to study the effect of the live (trash fish) food (T1), artificial diet (T3) or mixed between them (T2) at rate (1:1) on condition factor (Kf), gonado somatic index (GSI) and hepato somatic index (HSI) parameters, besides the anatomical and histological alterations of the gonads and the liver of Dicentrarchus labrax females and males brood stock through the feed period at 45 days, then spawning period at 15 days. In the feeding period, a total of 180 Sea bass brood stock females and males were used. The 90 females with 1190 – 1820 g per fish as an initial body weight were separately allotted in 9 concert tanks (three tanks / treatment). Also, 90 males with initial body weight ranged between (880 – 1400 g per fish) separately allotted in other 9 concert tanks. Fish were stocked at 10 fish per concrete tank (8 × 4 × 1 m) in black greenhouse in the same experimental conditions. The obtained results revealed that both sex fed the artificial diet (T3) significantly increased the Kf, GSI, and HSI compared to other dietary treatments (T1 and T2). Also, the same treatment (T3) seriously improved in the anatomical and histological of the gonads and the liver among other dietary treatments. The feeding fish on artificial diet (T3) had more effective on all tested parameters compared to the trash fish or the mixed diets, particularly for of females than males. Thus from the current findings, it could be concluded that the useful using of the good quality artificial diet in D. labrax hatcheries for enhancement their reproductive efficiency. Also these findings confirmed on the positively relationship between the feeding sources and reproductive efficiency of D. labrax brood stock, especially for females.
