Abstract: The development of the fertilized eggs and the development and growth of yolk-sac larvae of Tinca tinca in the period of starvation were observed and the point of no return ( PNR) was also studied. The results show that : ( 1) The embryo was hatched for about 52 h before hatching out with water temperature 21. 5 e . ( 2) After hatching, the larvae started to feed on the seventh day with low initial feeding rate, the initial feeding rate reached the highest figure 100% on the ninth day , and then decreased to 50% on the twelfth day, while the larvae reached the poin-t of-no-return. ( 3) After hatching, the highest yolk-sac consuming rate happened on the f irst day, while the highest growth rate of total length of larvae occurred on the second day. ( 4) On the eighth day after hatching, the yolk sac was absorbed completely, from then the starved larvae decreased in total length.