There are primarily 6 species of commercially cultivated fishes in Kerala. Out of the 6, three are Indian carps (Catla, Rohu and Mrugal) and three are Chinese carps (silver carp, grass carp and common carp). The fishes of the family Cyprinidae, the largest fresh water fish family, are commonly called by the name carp. Though there are thousands of species in the family, colloquially, only the larger species are often called by the name carp.
These are commonly found in rivers in Kerala.
4. Name: Silver carp
Scientific Name: Hypophthalmichthys molitrix
Images of Silver carp
5. Name: Grass carp
Scientific Name: Ctenopharyngodon idella
Images of Grass carp
6. Name: Common carp
Scientific Name: Cyprinus carpio
Images of Common carp
The composite fish culture involving these 6 species is found to be highly profitable, according to researches. This methodology is becoming popular among the fish farmers nowadays. In composite fish culture the 6 species are stocked together in farms and ponds.
What is meant by Composite fish Culture?
In a pond, the surface is occupied by floating organisms like plankton, the column region with live and dead organic matter sunk from the surface, and the bottom with detritus or dead organic matter. The different trophic levels of a pond can be utilized for increasing the profitability of fish culture.