![]() This study also served as an important reference for red tilapia aquaculture. Long-day application was effective in female reproductive performance and maturity. Small, red spots which are slightly raised from the skin and are mildly itchy or uncomfortable could be heat or sweat rash. This study demonstrated that continuous light manipulation during red tilapia early life could stimulate the growth and enhance coloration by reducing black spots that significantly affects economic profitability. The total β-carotene content of T3 group showed significant elevation with less number of black spots. ![]() Continuous light group (T3) showed shifted male sex ratio, while female percentage was higher in T2 group. Females in group T2 showed significant elevation in GSI%, relative fecundity, and estradiol (E2) with higher number of mature stage. Also, growth parameters and HSI% in female fish displayed significantly increased for T3 group. The results indicated that GSI% and serum testosterone (T) in T3 group significantly increased with greater amount of spermatozoa of male fish. By the end of the experiment, gonadosomatic index (GSI), relative fecundity, steroid hormones, maturity stages, sex ratio, and ovarian and testicular histology were examined also, growth performance, survival rate, skin color, and total β-carotene content were measured. Early life larvae were allocated into three treatment groups in triplicates: T1 = control group (12L:12D), T2 = long-day group (18L:6D), and T3 = continuous illumination group (24L:0D) for 90 days. The objective of this study was to investigate the impact of long-day photoperiod on the growth performance, reproductive parameters, maturity, sex ratio, β-carotene content, and skin coloration of red tilapia. Farming of red tilapia is one promising direction in aquaculture.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |