A study was conducted to determine the relationships between egg and newly hatched larvae sizes and growth and survival of Siberian sturgeon (Acipenser baeri) during early stages of development. Eggs (mean size 2.8 - 4.1 mm) were obtained from 20 cultured 13-14 years old females. Mortality during the endogenous feeding phase were less than 3.6% and occured among morphologically deformed fish. First feeding age (9-11 days post-hatch) correlated significantly with egg and newly hatched larvae size (P0.05). We conclude that under generally favourable rearing conditions, egg size has no direct implications for larval survival of Siberian sturgeon.