Variations in behaviour of freshwater fish Garra mullya caused by the effects of mercuric chloride
Keywords:
Mercuric chloride, Behavioural changes, Garra mullyaAbstract
An organism changes its response according to change in its environment. These changes are directed actions and are known as behaviour. Behaviour represents an integrated response of the organism, impairment in the functioning of any one of the body systems results in behavioral change. It is usually a very complicated phenomenon through which the animal is able to adjust to changes according in the environment. Behavioural patterns are also modified within limits which vary according to environmental stimuli, fast and slow movement, colour changes, etc. Any alteration in the chemical composition of a natural aquatic environment by pollution usually induces changed in the behaviour of the inhabitant, particularly fishes. When a toxic compound is administered, some changes occur from the normal behavior, and they can be observed externally. These behavioral changes would be caused by the changes in the nervous system caused directly or through metabolic or physiological activities. Due to the toxicity of heavy metals the physiological & behavioural changes occur. So the present investigation is to observe behavioral changes of Garra mullya exposed to lethal and sublethal concentration of mercuric chloride.
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