What is induced breeding in fish culture?

What is induced breeding in fish culture?

Induced breeding refers to inducing fish to release gametes through the application of pituitary extract or hormones or chemicals. are developed during breeding season could be used to identify sex in major carps which mature during their 2nd or 3rd year.

Which major carps are used in induced breeding?

In India, generally, pituitary glands are used as an inducing agent to breed Indian major carps and Chinese carps. The glands are collected from fresh gravid fishes as well as fishes well preserved for a period of a week or so. Using a sharp butcher’s knife the scalp is removed exposing the brain.

Which fishery is used in induced breeding technique?

Induced Breeding technique The induced fish breeding technique for the Indian carps (rohu, mrigal and catla) is slightly different from that of other Asiatic carps (grass carp, silver carp and big head).

What are the steps for induced breeding?

Steps of Induced Breeding Technique:

1. Collection of Pituitary Extract: Pituitary gland is collected from a mature fish, which is called as a donor fish.
2. Selection of Breeders:
3. Injection of Pituitary Extract:
4. Spawning in Breeding Hapa:
5. Precautions for Induce Breeding:

What is the purpose of induced breeding in fish?

Induced breeding is a technique by which ripe fishes are stimulated by pituitary hormone introduction to breed in captivity. The stimulation promotes a timely release of eggs and sperms from ripe gonads.

What is induced breeding?

Induced breeding is a technique where organism is stimulated by particular hormone or other synthetic hormone or by providing condition, introduced to breed in captive condition.

What is the role of pituitary gland in induced breeding of fishes?

The pituitary gland produces and stores gonadotropin hormones (GtH), which play a decisive role in ovulation and spermiation. Hypophysation is a technique whereby ripe fish brooders are stimulated by pituitary hormone introduction to spawn in captive condition.

Why induced breeding is called Hypophysation?

Induced breeding is also called hypophysation because it basically requires injecting certain endocrine agents (pituitary gland is also referred to as hypophysis) into both the male and female fishes.

What is induced breeding what are its advantages?

2)Desired species of carps can be cultured through the induced breeding. 3)large numbers of eggs are available from a fish through induced breeding. 4)In same season, a carp can be induced to breed more than once. 5)Transportation cost becomes very low as the carps can breed in any desired pond.

What kind of fish are used to breed Indian carps?

The induced fish breeding technique for the Indian carps (rohu, mrigal and catla) is slightly different from that of other Asiatic carps (grass carp, silver carp and big head). The techniques are described separately for the two groups of fishes, which are as follows: (a) Breeding of rohu, mrigal and catla:

Can a common carp breed in a pond?

Common carp can breed easily in natural pond conditions. Therefore induced breeding is not required. In common carp breeding, one female and two male brooders are required to form a set. The weight of the two male brooders and one female brooder should be equal for ensuring total breeding and fertilization.

How does induced breeding of fishes take place?

For the induced breeding of fishes the preparation of pituitary extract is very important. But it is very easy to prepare. Immediate after the collection of the pituitary glands are kept in absolute alcohol for dehydration. After 24 hours, the alcohol is changed for further dehydration and defattening.

What is the fecundity of an Asian carp?

This outstanding success in induced spawning of Asiatic major carp has revolutionized carp culture production through commercialization of carp seed production. Fecundity:- It is the number of ripening ova in the female ovary prior to spawning period.