Finfish Breeding and Hatchery Management

Unit 3 - Breeding of major carps

3.3.4. Dosage of pituitary extract

Assessment of proper dosage is most important for successful spawning. In practice, the female receives two injections, while the male receives only one injection, i.e. at the time of second injection to the female.

I Dose or Provocative or preliminary dosage and II Dose or effective or resolving dosage.

The interval between the two doses is 6 hours.

Carp glands to major carps

	Female	Male
I Dose	2-3 mg/kg b.w.	nil
II Dose	5-8 mg/kg b.w.	2-3 mg/kg b.w.

Carp glands to exotic carps

	Female	Male
I Dose	4-6 mg/kg b.w.	nil
II Dose	10-16 mg/kg b.w.	4-6 mg/kg b.w.

Catfish glands to major carps

	Female	Male
I Dose	10 mg/kg b.w.	nil
II Dose	20 mg/kg b.w.	10 mg/kg b.w.

Catfish glands to exotic carps

	Female	Male
I Dose	20 mg/kg b.w.	nil
II Dose	40 mg/kg b.w.	20 mg/kg b.w.