Chand Fish Seed Company Howrah, West Bengal

Method of rearing of spawn to fingerling stage in two steps is called double stage rearing. Initially the spawn is reared up to fry stage in nursery ponds. It takes about 7 to 12 days. Afterwards, they are transferred to relatively bigger size ponds known as rearing ponds where they are reared up to fingerling stage.

The larvae emerging from the fertilized eggs after hatching is called hatchling. It is characterized by the presence of yolk sac hanging below from where it draws its nutrition for 2–3 days. At this stage the mouth is not formed and hence it does not take food from outside.

As soon as the spawn assume the shape of the fish and grow to about 1–2 cm it is known as fry. At this stage they are primarily smaller size zooplankton feeder. It takes about 7 to 10 days for the spawn to grow up to fry stage.

As soon as the fry grow up to 10–15 cm size or roughly equal the size of a finger it is known as fingerling. Fingerling is the proper size for stocking in table fish production ponds. It takes about 30–60 days for the fry to grow up to fingerling size.

common carp are not native to our area; they introduced into Amrica from Asia  as a food sorce. Unfortunately, carp hurt our native fish species by uprooting plants, disturbing the bottom, and eating fish egg. Beside fish egg, carp eat algae, other water plante, insects, earthworms, aquatic worms, snails, mussels, crayfish, and rotifers. They also eat old dead plant part ftrm the bottom. common carp swim along the bottom, suking up mud and food items. They spit out the stuff they don"t eat. carp are most active in early morning and evening. common carp spawn (breed) in weedy areas.