Question

Rearing different species of fish within the same water body is known as……….

Answer 1

So as to get high production per hectare of the water body, fast-growing compatible species of fish of various feeding habits are stocked together within the same pond in order that all its ecological niches are occupied by fishes.

Complete answer
Within the same area or fish pond, the ‘composite fish’ culture is the process of rearing different species of fish. All the species use the food available within the pond without competing with one another thus enhancing the survival of various species within an equivalent area.
An advantage of composite fish culture is:
-it increases the yield of fish.
-five or six different species are grown together during a single fish pond.
-The survival rate of fish increases and their yield also increases without affecting the opposite species.

So the answer to this question is known as ‘Composite fish culture’.

Additional information:
A single species of carp culture during a pond is understood as monoculture and previously this mono-culture was the traditional practice in many of the countries. Hence there was a little production of 300-600 kg of fishes per hectare of water during a pond. Subsequently, there's an excellent change within the process of carp culture. Rather than single species, quite one species of major carps are selected for rearing and culture within the same pond. they're living in several water levels also as they need different feeding habits. This process of rearing fishes is understood as a composite fish culture.

Note:
Carps that are normally available within the inland waters of the Indian region are referred to as indigenous fish. Indigenous carps are of two kinds, like major and minor carps. The carps that are big-sized cultivable fishes with the rapid climb and high demand within the market are referred to as major carps. The carps that are comparatively small-sized with slow growth are referred to as minor carps, like Bata (Labeo bata), Punti (Barbus to), etc.