The present study was carried out during the period of different phases of reproductive cycle in C.gachua i.e. preparatory, pre-spawning, spent and post-spawning. Morphometrics of the gonads i.e. the gonadal dimensions observed month wise for a complete year span. The ratio of the avg. Length and weight of the ovary is recorded maximum during July (3.8cm: 9.5gm) closely followed by August (2.8cm: 7.4gm). The same is recorded the least in the month of December (1.0 cm: 2.0 gm). It clearly shows that C.gachua spawns once in a year i.e. between July-August. It was observed that the testis of C.gachua attains its maximum length in the month of July (1.5 cm) closely followed in August (1.3 cm) and is least in the month of October to December (0.3 cm). The length: weight ratio of the species also recorded maximum during July (23.7cm: 56.6 gm) and is minimum during December (14.5cm: 32.8gm). Similarly avg. length: avg. weight of testis was observed maximum during July (1.5 cm: 2.1 gm), closely followed by August (1.3cm: 1.2 gm). The same ratio was observed the minimum during the month of Nov- Jan (0.2cm: 0.2mg). The same result was also observed in C.gachua by Khanna and Sanwal, 1971. December is the post spawning period (spent phase) of the species.
Morphometrics, gonads, gonadal dimensions, spawning
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