Intensified artificial breeding method for Australian crayfishes

Abstract

The invention discloses an intensified artificial breeding method for Australian crayfishes. The method comprises the following steps of: putting pubescent parent crayfishes which pull through a wintering period into a spawning pond according to a proportion of 1-3: 1 of female and male, wherein circulating water is adopted in the spawning pond to automatically control and increase oxygen; sterilizing fertilized ovigerous female crayfishes, putting into small hatching lattices in a hatching pond, wherein one crayfish is hatched in each small hatching lattice, and carrying out water-flow hatching; and enabling hatched young crayfish seeds to leave away from mother bodies after 30-50 days of incubation period, enabling the young crayfish seeds to escape into water through a filter screen of the hatching pond, after all the crayfish seeds at the abdomen of the ovigerous female crayfishes leave away from the mother bodies, immediately separating the parent crayfishes, and remaining the young crayfish seeds to be continuously cultivated for 5-10 days, so that the cultivation can be carried out. According to the method, the artificial intensified breeding incubation can be carried out according to the required offspring seed quantity and the required offspring seed time at any time, the water temperature, the dissolved oxygen, the water quality and the like can be controlled, the method can not be influenced by environment, and the method is high in fertilizing rate, spawning rate and hatching rate.

Description

technical field [0001] The invention relates to an aquatic breeding method, in particular to an intensive breeding technique for shrimps. Background technique [0002] Australian freshwater lobster, scientifically known as four-ridge light-shelled crayfish, also known as red-clawed crayfish, is native to Australia and looks like a lobster in the sea. It is one of the most valuable freshwater economic shrimp species in the world. The body color of this shrimp is brownish green, and there is a membranous bright red band on the outer top of the claw of mature male shrimp, which is beautiful and beautiful, so it is also known as red claw shrimp. Its appearance is beautiful, the body color is brownish green, the head, chest and abdomen are evenly connected, covered by a hard shell, and has 5 pairs of thoracic legs, the first pair of thoracic legs The claws are particularly developed and become powerful. Males have more developed claws than females. There is a membranous bright r...

AI Technical Summary

Problems solved by technology

Although this is more advanced than traditional shrimp breeding methods, it still has the following disadvantages: the first is that water temperature, dissolved oxygen, water quality, etc. cannot be controlled, and are greatly affected by the environment, resulting in low fertilization rate, spawning rate, and hatching rate; The breeding time and quantity cannot be controlled artificially, and cannot be produced quantitatively according to the required seedlings; thirdly, due to the inconsistency of spawning and fertilization time of shrimps, the seedlings hatched in the same pond have large differences in size, and the seedlings are not neat and cannibalize each other, resulting in seedling cultivation The survival rate is low; Fourth, when hatching in the same pond, brooding shrimp compete for food and territory, etc., bite each other, fight and cause shrimp damage, fertilized eggs fall off, and hatching seedlings are eaten away.