Breeding of Striped flying barb (Esomus metallicus)

Abstract

Studies on sex ratio in breeding of Striped flying barb (Esomus metallicus) using hormone injection. These were undertaken through hormone injections including female broodstock with suprefact at 15 μg/kg plus motilium at 10 mg/kg as well as male broodstock with suprefact at 7.5 μg/kg plus motilium at 10 mg/kg. The studies were divided into 3 treatments with 3 replications. The treatments were male to female ratios of 1:1, 2:1 and 3:1 respectively. Experimental results showed that the 1:1 ratio was considered the appropriate condition because the female broodstock could lay high number of eggs (i.e. 1,688±114.71 eggs) and obtained the highest hatching rate, hence 88.51±1.22% (p<0.05). For studies on hormone concentration in breeding, experiments were conducted with 5 treatments with 3 replications. The different levels of Suprefact hormone concentrations were 5, 10, 15, 20 μg/kg and control group (non-injection) in female broodstock. Whereas the male broodstock used half to the Suprefact hormone concentrations in females broodstocks including 2.5, 5, 7.5, 10 μg/kg respectively and control group (non-injection). It was found that female broodstocks injected with Suprefact at 20 μg/kg and motilium at 10 mg/kg as well as male broodstocks injected with Suprefact at 10 μg/kg and motilium at 10 mg/kg. that considered the most appropriate condition because the female broodstocks could lay the highest number of eggs (i.e. 1,938±211 eggs), while different hormone concentrations did not affect hatching rate, fertilization rate and survival rate 24 hour after hatching (p>0.05). The egg after fertilization was developed and hatched out within 14 hours.