Studies on the plankton of the east coast of India. Part II. Seasonal cycle of plankton and factors affecting marine plankton production with special reference to Iron content of water

Abstract

The results of studies extending for nearly three years on the fluctuation of the plankton crop and factors responsible for production are reported. The peak production occurs during the south-west monson months. The cycle of physical and chemical factors and their relationship to plankton production are discussed. Data for iron content, estimated for the first time for our waters, are presented. It is concluded that, in Indian waters, it is the physiological state of the floral elements that finally decides the magnitude of plankton production on which ultimately depends fish production.