Abstract
objective of this -study was to establish correlation between physico-chemical factors and dry weight of planktonic biomass. Among the physical factors significant (P < 0.05) interaction between dry weight of planktonic biomass and light penetration was observed. The coefficient of determination (R )2 of physical factors on biomass was observed to be .389. The correlation of biomass with total alkalinity, total hardness, potassium and nitrates ,•as significant (P < 0.05). The calculated R' of chemical factors on dry weight of planktonic biomass was .753, The overall contribution of physico-chemical factors towards dry weight of planktonic biomass was 83.31%.
INTRODUCTION Fish culture is considered today as one of the most promising sources of animal proteins for the future. Of late, the potential and verstality of fish culture has been increasingly realised all over the world and much more attention is being directed towards its adoption and promotion. Pakistan has extensive fresh water fisheries resources which at present are not being adequately utilised due to lack of research and other technical inputs. Studies on limmological aspects of water bodies are of great significance in intensive fish farming. The biological prOduction of freshwater provides basic food for the growth of fish which in turn depends upon the ecological and physico-chemical conditions of water body. Ecologically,
