what are effects of DDT on the hormones of a fish ?How does it affect their hormones?

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orchid101 | College Teacher | (Level 1) Associate Educator

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Pesticides are the chemicals used for killing the plant and animal pests. Measurable amounts of DDT residues may be found in air, soil, water and thousand of kms from the point where it had originally entered the ecosystem. For instance if DDT enters a pond, lake, it is taken as such by the plants, then to minnows eating the zooplanktons, then to fish which eats the minnows and finally in the body of birds who eat the fish. Not only DDT as such in its original form keeps on moving from water to different living components of the pond system but more threating is the DDT concentration continuously increases in successive trophic level in a food chain. This phenomenon is known as biological magnification or biological amplification