Abstract
A correlated study between gonadal cycle and pituitary cells has been carried out in terms of GSIs on Cyprinus carpio. The main purpose of study was to understand the effect of various seasons on breeding cycles of the experimental fish. The fish was found as a multiple times breeding species. Its breeding cycle has been divided into four stages naming pre, 1st, 2 nd and post breeding season. Also the pituitary cells were found small sized granulated during preliminary season, large sized granulated during pre-breeding, fully granulated/chromophilic during first breeding and degranulated / chromophobic at the onset of second breeding season. Highest peak of GSI (12.1 ± 1.2) was first found in the month of March while second peak was observed in the month of June (12.06 ± 0.72). The study results will benefit the fish farmers in terms of economic benefits as this is a multiple breeding fish, thus farmers can get the yields twice as compared to other teleost fishes.
