Culture method of mud flat crab, Chasmagnathus convexus

摘要

The present invention relates to a method for producing artificial seeds of sea crabs carried out indoors. (A) Mother sea crabs were subjected to a light cycle of 14 to 16 hours and a dark cycle of 8 to 10 hours at a water temperature of 23 to 28 °C for 28 to 32 days. Repeatedly forming an outer envelope with a fertilized egg attached to the shell of the mother crab; (B) hatching the fertilized eggs into zoea larvae by maintaining the embryonated eggs under the same conditions as in step (A) for 15 to 20 days; (C) feeding the hatched zoea larvae at a water temperature of 20 to 35° C. and maintaining them for 12 to 18 days to transform into megalopa larvae in which claws are formed; (D) feeding the Megalopa larvae at a water temperature of 20 to 35° C. and maintaining them for 5 to 10 days to transform them into young crabs; And (E) rearing young crabs at a water temperature of 20 to 35° C. in an environment covered with gravel of 5 mm or more in diameter; by including, fertilized eggs can be obtained at a desired time through early incubation of the legal protected species. The survival rate can be improved while shortening the rearing period of larvae.