Comparison of breeding indices in Merigal Indian carp Cirrhinus cirrhosus with Ovapas, Ovaprim and pituitary hormones

Merigal (Crirhinus cirrhosus) is one of the three most important species of Indian carp in tropical fish breeding system in the world. In order to diversify the tropical fish aquaculture system, Indian carp species were imported to the country. In order to compare the indicators In this research, 40 brooder females with mean (± standard deviation) weight and total length of 3212.69±5.31 grams and 635.38±3.32 cm were investigated in this research. The propagation temperature is 28-28.5 degrees was recorded. The synthetic ovulation induction hormone Ovapas (made in Iran), Ovaprim and pituitary hormone were used to stimulate spawning. The control group without hormones was identified with physiological serum. The injection was done intra-muscularly and in one step. Reproduction indices were investigated in different groups. The results showed that the percentage of spawning success in different groups was recorded as 100, 90 and 80%, respectively, and in the control group, the spawners did not respond to the injection. Latency period in the groups was calculated to be 6.5-8 hours long, which was the shortest time in the group of ovapas hormone. Merigal fish has non-adherent eggs, the number of eggs per gram and number of eggs per cc, the size of extracted eggs, the size of fertilized eggs and the size of hatched eggs were measured. No significant difference was found in the groups. The average fertilization percentage was 91.2±5.33, egg hatching percentage was 80.66±1.7, and larval survival percentage was 71.80±2.83. The hatching time of larvae was calculated after 16 hours and 20 minutes. The size of newly hatched larvae was 4.55±0.06 mm. Reproduction data shows that Ovapas hormone can be a good substitute for imported hormones such as Ovaprim and Hypophysis, considering that most of the hormones are imported and any change in the system can affect the entry of these hormones, so domestic production is It can help in the sustainability of the aquaculture system. The synthetic hormone Ovapas is a knowledge-based product that can prevent foreign exchange from entering the country and play a significant role in the sustainability of aquaculture and in more production. The results obtained In determining the breeding biotechnique of Merigal fish, it can be used in the development of breeding and breeding of this species and introducing it to the country's aquaculture system.