Effects of different types hormone on breeding of sand whiting (Sillago sihama Forsskål, 1775)
Abstract
This study aimed to assess the effect of hormone on latency period, spawning rate, fecundity, fertilization rate, hatching rate, embryonic development time and survival rate of larvae 5 days after hatching of sand whiting. Four treatment groups were designed, each utilizing a different hormone: HCG (500 UI/kg of fish); LHRHa (20 µg/kg of fish); Ovaprim (0,5 mg/kg of fish) and a Control group. Each hormone treatment was replicated three times. The results revealed that the treatment with HCG demonstrated the highest spawning rate (66,70%), fertilization rate (64,64%), hatching rate (70,42%), length of newly hatched larvae (1,62 mm), and survival rate of larvae 5 days after hatching (75,70%), with statistical significance (p<0,05). However, there was no significant difference between the treatment using HCG and Ovaprim (p>0,05). Additionally, no significant variations were found in embryonic development time, oil globule, yolk sac characteristics among treatments using different hormones (p>0,05). Consequently, the application of HCG at a dosage of 500 UI/kg of fish is suggested as an effective method for artificial breeding of sand whiting.
Keywords: Sand whiting (Sillago sihama), HCG, LHRHa, Ovaprim, breeding
