What is broodstock pond?
Broodstock can be a population of animals maintained in captivity as a source of replacement for, or enhancement of, seed and fry numbers. These are generally kept in ponds or tanks in which environmental conditions such as photoperiod, temperature and pH are controlled.
Why is it important to have broodstock selection?
Perhaps the most important aspect of broodstock management, after spawning of the required quality and quantity has been achieved, is genetic improvement, the domestication process by which genetic selection improves desired traits over generations.
What is brood bank?
A State Brood Bank would produce and supply Breeder Seed of the Improved Varieties/Strains to a network of Registered Seed Multiplication Centres in the respective State/UT, to rear, grow and manage them as Brood Stock/Brood Fish. Essentially, a State Brood Bank would not supply Breeder Seed to Fish Farmers.
What is brood fish care?
Brood stock/fish: Brood stock, or brood fish are a group of mature individuals used in aquaculture for breeding purposes. Brood stock management involves manipulating environmental factors surrounding the brood stock to ensure maximum survival, enhance gonadal development and increase fecundity.
How do you deal with broodstock?
Collection of broodstock The best way is by drag-net early in the morning when it is cool. Then put the fish in net enclosures or hapas in the same water body for 1 to 2 hours. They get used to a limited space and stop trying to escape (then they don’t get injured).
What is nursery pond?
Nursery ponds: Ponds where spawn are reared to fry stage. In carps it takes about 15-20 days to grow spawn to fry size. Rearing ponds: These are ponds where fry are grown to fingerling size. In carps it takes about 2-3 months to rear fry to fingerlings size.
Why we have to feed the broodstock with highly nutritional diet?
Seed quality improves with the increase in the quality of the nutrition of the broodstock. The diet rich in unsaturated fatty acids increases the percentage of live larvae after yolk resorption and improves larvae’ weights and their ability to resist osmotic shock.
What is Hypophysation in fish?
Hypophysation is a technique whereby ripe fish brooders are stimulated by pituitary hormone introduction to spawn in captive condition. Injected pituitary gland extract bypasses the brain-pituitary lin , acting directly on the ovaries and testes, providing the surge in blood GtH levels that normally precede spawning.
Why do fish spawn over a period of time?
The expulsion of gametes from the body into the surrounding water is called “spawning” resulting in fertilisation. Fish spawns during a specified periods of the year which coincides with the several environmental factors that are available during the said period only.
How can you tell a male from a female brooder?
Look at their down color. A chick is covered with downy, soft, small feathers until it develops past 6 weeks of age. Male chicks usually have light-colored heads, whereas females often have dark brown ones. If a female has down spots or stripes, they are typically brown or black.
What is the importance of induced breeding?
It assures timely available of pure seed, where as in nature the availability of seed is quite uncertain. It can fulfil any quantity of demand in any time. It also cuts short the holding potential spawners over long periods in uncertain hope of their breeding in time.
When should I stop feeding my fish?
Once the temperature drops below 52℉, stop feeding your fish since their metabolisms slow down a lot. Even on warmer days during the winter, resist the urge to feed them — any algae growing on the walls of your pond will be enough to sustain them.
https://www.youtube.com/watch?v=nLmg4wSHdxQ