Oncorhynchus keta) in the Amur and Ussuri Rivers. We collected 571 homing Chum salmon in 2010 and 2011. Using a logistic growth function, we simulated the growth of Chum salmon and estimated the speed and additive rate of growth. Chum salmon grows faster before the age 3, after which the rate of growth declines. In Chum salmon that migrate upstream at the age of 3⁺, the highest rate of growth occurred at age 1.372 and 1.492 for male and female individuals, respectively. The lowest additive rate of growth occurred at age 2.674 and 2.823, which corresponds to the beginning of maturation. The total fork length at which 50% of male and female individuals reach sexual maturity () was estimated using a logistic moderating function, and was 46.19 cm for males and 47.95 cm for females. The corresponding age was 2.00 and 2.15, respectively. ARSS analysis revealed a significant difference between male and female individuals. appears to be a useful indicator of population health for the fishery resource management. The positive correlation between GSI, absolute fecundity, and fork length was significant for female Chum salmon from Amur River. Conversely, we observed a significant passive correlation between these variables for male individuals. The regression function was as follows:=0.423)<0.05). The GSI of Chum salmon from Amur River was higher than that for Ussuri River stocks.nsynchronization of gonad development resulted in a non-significant correlation between GSI and fork length.