Question

what is composite fish culture system? plz, explain according to NCERT ??????????

Answer 1

Composite fish culture is a system in which five or six different species of fishes are grown together in a single fishpond. Fishes with different food habitats are chosen so that they do not compete for food among themselves. For example, catla feed on the surface of water, rohu are middle zone feeders,mrigal and common carp are bottom feeders, and grass carp feed on weeds. This ensures complete utilization of food resources in the pond. Such a system increases the fish yield. 

Answer 2

Composite fish culture is simply the fish culture in which two or more  types of fish are cultured collectively.  It is one of the advanced technique for fish culturing.  This is done to get more yield from a pond.

For composite fish  culture only compatible fish can be used because some may not be able to live with other fishes .

Also,  the feeding habits of every fish may be difference from others.

So while choosing the fish keep in mind the variety of the fishes , pond management facilities availability along with food of fishes