Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

INDUCED BREEDING AND LARVAL REARING OF LOCAL AND THAI KOI (Anabas testudineus, BLOCH, 1792) (Pages : 63 - 68)

Four combinations of crossbreeding were conducted to study the effects of hybridization between Local and Thai Anabas testudineus on the performance of F1 progeny. The experiment was carried out with four treatments T1 - L? × L?, T2 - T?× L?, T3 - L? × T? and T4 - T? × T? with each having three replications. There was a significant differences among four treatments in the viewpoint of ovulation and hatching rate and the results revealed that T4 was significantly (P<0.05) higher than that of T1, T2 and T3. The results also revealed that there was a significant (P<0.05) difference in fertilization rate and survival rate of breeding and significantly (p<0.05) higher values were observed in treatment T1 compared to the other three treatments T2, T3 and T4. Cross between Local and Thai A. testudineus resulted variation in survival rate of hatchlings. Higher net weight gain was observed in T4 (0.910±0.550 g) followed by T3 (0.875±0.508 g.), T2 (0.866±0.420 g.) and T1 (0.738±0.650g.) which indicates that there was significant difference (P<0.05) in mean weight gain among four treatments. The total length increments of A. testudineus hatchlings in four treatments during the study period of 28 days was observed in T4 (22.56±3.50 mm) followed by T3 (21.70±3.00 mm), T2 (21.50±3.30 mm) and T1 (19.60±2.57 mm) which indicate that there was significant difference (P<0.05) in total length gain among four treatments. Water quality did not differ between the treatments having optimum level for culture. The growth rate regarding weight gain and total body length of T3 is higher than that of T1 and T2. It is crystal clear from the experiment that T4 showed highest growth rate that is desired almost the entire farm owner but due to the consumers’ demand of Local koi, T3 may be rational to produce seeds for commercial farms.Download