Reproductive Biology of Tetraodon cutcutia (Pisces: Tetraodontidae) from Meleng River in Jorhat District, Assam

Abstract

The fresh water puffer fish, Tetraodon cutcutia shows sexual dimorphism during breeding season. The gonado-somatic ratio (GSR) was increased from March and reached its peak in June (4.832±0.56) and progressively decreased after words till January in case of female. The maximum ova diameter (1.09±0.35mm) was recorded in July and the minimum (0.32±0.12mm) in February. The absolute fecundity ranged from 447.48 to 1540.08 and that of the relative fecundity varied from 68.79 to 166.25. The number of egg increases as the fishes gain the weight and length. T. cutcutia breed once in a year during summer season (May, June, July).