Swimming crab indoor manual control orientation copulation method

Abstract

The invention discloses an indoor manually controlled directional mating method of portunids, which can be used for propagation and cross breeding of portunids. In this method, an indoor cement pit is divided into a plurality of enclosures of 1-3 square meters by a 20-mesh straight net; portunids that weigh more than 180 grams are moved into the enclosures from an outdoor artificial cultivation pond. One male portunid and 1-3 female portunids are put into every enclosure, water exchange, air inflation and bait casting are carried out at a definite time. After the female portunids cast off a skin, the mating can be carried out, and after successful mating, the female portunids can be numbered on the carapaces. By using this method, the mating rate of portunids is higher than 80%, the wintering survival rate reaches 80%, and every portunid can hatch 600, 000 larvae in average.

Description

technical field

[0001] The invention belongs to the artificial propagation technology of swimming crabs, and relates to a method for indoor artificial control of directional mating of swimming crabs. Background technique

[0002] Swimming crab is one of the important marine biological resources in my country, with high economic value, and it is also an export product. In the northern coast of my country, large-scale artificial breeding began in the late 1980s. At present, the swimming crab breeding industry in the country is developing rapidly, with an annual output of nearly 100,000 tons and a breeding area of ​​50,000 hectares. The breeding area and production increase by about 20% every year.

[0003] Swimming crab breeding mainly relies on artificial propagation, and the premise of artificial propagation is the need to obtain mating broodstock. Before the present invention was made, the artificial breeding method of Portunus was mainly to catch mated wild female brood ...