Question

Why is Gambusia introduced into drains and ponds?

Answer 1

Hint:Mosquito control has been a point of concern in various health-providing units. Various methods have been developed to reduce or eliminate mosquito population. Certain environmental issues related with chemical control of mosquitoes have convinced experts to opt for biological control methods.

Complete answer : Gambusia is a fish that preys upon the larvae and pupa of mosquitoes. It is also known as mosquito fish. It is a natural enemy of mosquitoes and considered as a biological agent for the control of mosquito larvae.Gambusia is a natural enemy of larva and it also feeds upon the larva of mosquito along with some other planktons. Feeding upon larva is helpful in restricting the breeding of mosquitoes responsible for causing malaria. It thus checks the diseases spread by mosquitoes.

Notes:Gambusia is a small, freshwater minnow-like fish. It is a surface feeder and eats mosquito eggs and larvae by the hundreds every day. A dozen Gambusia are good for about 48 surface feet of water.
The fish can survive in stagnant water. It grows only to about two inches in length and breed to the size of their container to prevent overcrowding.

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