Vol. 11, Special Issue 10 (2022)

Author(s):
Ningthoukhongjam Soranganba

Abstract:
Physiological condition factors were measured in two different age groups male Amur common carp of during summer, autumn, winter and spring seasons in order to understand the relationship associated with their reproduction stages. Fulton’s condition factor (K), somatic condition factor (Ks), hepatosomatic indices (HSI) and gonadosomatic indices (GSI) of male fishes were measured. Significant differences (p<0.05) were observed for both age groups in relation to age, seasons and interaction (age and seasons) for GSI, HSI, K and Ks level. Levels of GSI, HSI, K and Ks were higher in 2+ year’s age group male as compared to 1+ year’s age group in all four seasons. Pearson’s correlations (p<0.01) showed a significant positive correlation of GSI with K and Ks and also between K and Ks. A significant negative correlation was observed between HSI with GSI and Ks. The physiological indices observed in 1+ and 2+ year’s age Amur common carp indicated the presence of developed/mature gonads throughout the year with two major peaks – one in spring and other in the summer season. Higher age groups (2+ years) had higher index value, which signified their higher reproductive potential than younger (1+ year) age group.