WATER QUALITY AND SOIL CONDITION OF FISH PONDS IN SOME STATES OF INDIA IN RELATION TO FISH PRODUCTION
2011
Banerjea, S M
Maintenance of a healthy aquatic environment and production of sufficientfish food organisms in ponds are two factors of primary importance for successfulpond cultural operations. To keep the aquatic habitat favourable for existence,physical and chemical factors like temperature, turbidity, colour, odour, pH, dissolvedgases like oxygen, carbon dioxide and also reducing gases Hke hydrogen sulphide,methane working lethal on fish life, will excercise their influence individuallyor synergetically, while the nutrient status of water and soil play the most importantrole in governing the production of plankton organisms or primary productionin fish ponds. Rating of fish ponds on the basis of these factors is a difficultproblem because of the complexities influencing and governing these factors andalso for the fact that it is not possible to study the effect of any individual factorunder uniform optimal conditions. Nevertheless from a study of a large numberof ponds under diverse physical and chemical conditions it is possible to arrive atsome broad generalisation which can be gainfully used by fish farmers. It may beremembered also that different fishes behave differently as to the suitabihty ofenvironmental condition and food habit. As the major carps, catla {Catla catla),rohu (Labeo rohita) and mrigal (Cirrhina mrigala) are the widely cultivated fast-growingfishes in India these have been always used as standards except when otherwisementioned.
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