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Induced Breeding In Indian Major Carps
Hypophysation refers to breeding fish with pituitary extract. Brazilians developed this technique. In India, H.L.Chaudhary and K.H.Ahi pioneered the use of this technology for major Indian carpets. Incentive breeding methods to encourage fish to release gamete by pituitary extract or the application of hormones or chemicals.
Induction discharges occur during the start of the southwest monsoon season (June) where there is an accumulation of rainwater in ponds and a slight decrease in temperature. It is considered that the ordinary pituitary carp has better results, but in most cases, the gland is used the same species as Gonadotropin Human Crop (HGC). The administered dose of the pituitary gland depends on the maturity stage of the fish, and the environmental condition (rain and temperature). A primary dose of 1 – 2mg / kg and the second dose of 6 – 8 mg/kg of the bodyweight of fish is administered after six hours. After injection, the seed fish must be transferred into the breeding hat after the ratio of two men to one woman. The breeding hat is a box enclosure by using a cloth. There are about 50,000 to 1,00,000 hatched eggs in a cap of size 2 x 1 x 1 m. A facility is also provided to open and close the upper flap. The corners of the garment on each side are attached to poles to keep them safe. The bottom should not be in contact with the ground. The water temperature is to be kept at 26 – 31C. A leak occurs after 16 – 18 hours and the burial falls into the outer cap. The breeding occurs regularly after 4 – 6 times the second injection. Because of the nature of these fish, they only spawn once, unlike rohu and metal that have the potential to leak again after one or two months.
Injecting within the muscles administered (pituitary or ovaprim or ovatide) into the muscle is a caudal peduncle between the end of the dorsal fin and above the lateral line. It is often practiced and is the most effective and least risky method.
The in-peritoneal injection is administered in a soft region of the body such as the pectoral fin base. This method could damage the unit or liver.
The cranium is called an intravenous injection. This method is very dangerous and damages the brain.
CALCULATION OF CALCULATION:
The dose is calculated based on the weight of the fish.
FISH WEIGHT x Ovaprim® DOSAGE = SIZE OF INITIAL
1) 0.2 kg 0.5 ml / kg 0.1 ml
2) 50 gm 0.5 µl / gm 25 µl
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