Abstract: | As the breeding of Chinese mitten crab develops in China,the artificial reproduction techniques become more and more perfect,and the output of Chinese mitten crab rises. But the precocity of this kind of crab in the north restricts their breeding. This experiment studied the ways of how to breed megalopa to commodity crabs in one year. In the north, the megalopa growth period to commodity crabs is only 5 months in one year which makes them have difficulty in reaching commodity standard. If megalopas bred in winter for a short period, for the next spring,it is possible for big juveniles to grow to commodity crabs in the same year. For this purpose,we tried artificial reproduction in winter of 1994-1995 on Binhai Breeding Farm. On December sib, 1994 and January 15th, 1995,we successfully produced 115 kg megalopas. These megalopas were bred to juveniles,and in October of this year,they grew to commodity crabs whose average weight exceeded 100 g. In this experiment,the economic and social results are satisfactory. |