QUANTITATIVE RELATION BETWEEN MARINE AND FRESH WATER PREYS AND PREDATORS DETERMINED BY ³²P

Abstract

1) A few species of marine and fresh waters preys and predators were used to find out the absorption rate, with ³²P as indicator.
2) Fresh water fishes showed lower absorption rate than marine water fishes about most of preys except that of insect larvae and planktonic crustacean.
3) When the taxonomical position of pery and predator was close the absorption rate was higher.
4) Young ones of any fish were found to be good food for any large size fish.
5) Absorption rate was higher when the fish was fed by the muscle of the same species of fish as the predator.
6) When goby was fed with different parts of goby as prey, a lower value was seen in the case of bone as prey.
7) Bivalve mantle was found to be good food for all fishes except minnow which has no habit to take it in nature.
8) Insect larvae and small planktonic crustacean were found to be good food for all fishes except goby, file fish and minnow.
9) Absorption rate obtained by the experiments stood same for any concentration of ³²P in the prey.