Abstract
A two year study on seasonal variations of the physicochemical factors and plankton of a freshwater fish pond was made. The importance of these factors in fish culture has been discussed. pH ranging between 7.3 and 8.4 falls within the range considered suitable for fish growth. The amount of dissolved gases at any given time is found to be associated with biological activities taking place in the medium. The relatively high total alkalinity values observed may also help in higher yield of fish. Low phosphate content is attributed to utilisation by phytoplankton. Most plankters exhibit a single annual peak, though individual species have different seasons of maxima. Volume and dry weight values also showed a single peak suggesting a period of maximum production. However, year to year variations observed in total quantity of plankton is likely to affect fish growth and production.
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