Question

What is Compost fish Farming? Write its disadvantage (Class 9 Biology Improvement in food resources

Answer 1

The disadvantage is that all have common food habits and lives in same region.

There will be shortage of food and space.

Mark brainlest please.

Answer 2

Composite fish culture. ... In this system, of both local and imported fish, a combination of five or six fishspecies is used in a single fish pond. These species are selected so that they do not compete for food among them by having different types of food habitats.


Disadvantages of Fish Farming

Water Pollution and Infections
Farmed fish are often treated with antibiotics, disinfectants and pesticides. These chemicals combined with fish wastes may find their way into surrounding fresh water hence resulting in water pollution.

Moreover, the congestion of fish in one area may result in the death of some fish. Dead fish encourage the growth of bacteria and other infections, which may threaten the entire fish population in the water source. Also, due to fish congestion, infections spread easily among the fish population since they are often in close contact.

Expensive to Set Up
The initial setup costs for fish farming may be expensive due to the need to install fish cages, hatcheries and provision of processed fish food. In addition, as opposed to fish farming in large water bodies, fish farming in ponds requires costly excavations and channeling of river water into and out of the fish ponds.

Genetic Abnormalities
Farmed fish have limited gene pool during breeding. This increases chances of genetic abnormalities among the fish offspring.