Abstract

5.Study on Gonosomatic Index of female Discognathus modestus in River Son at Anuppur
Sangeeta Mashi
Gonosomatic index of female Discognathus modestus were studied during one year. The experiments were conducted from January 2016 to December 2016. After dissecting, gonads were preserved in 10 % formalin. Results showed that Discognathus modestus is a heterosexual fish. Gonads were fully developed during the month of June, July, and August when the GSI were the highest. The values of Gonosomatic index were maximum at the time of spawning. This indicates that Gonosomatic index are the key factors of reproductive cycle of Discognathus modestus. Water temperature also measured during the course of study and its fluctuations show that it is also affect the growth and development of gonads. Keywords: Discognathus modestus, Gonosomatic index, spawning