Method for screening and breeding high-egg-carrying-amount cherax quadricarinatus parents

Abstract

The invention discloses a method for screening and breeding high-egg-carrying-amount cherax quadricarinatus parents, and belongs to the technical field of cherax quadricarinatus parent screening. Themethod comprises the following steps that (1) primary screening of the parents is carried out; (2) parent screening is carried out by taking a first abdominal segment width / full length as an index instead of an egg laying amount index; (3) enhanced cultivation and ripening of the parents are carried out; (4) mating and breeding of the parents are carried out; (5) egg-carrying shrimps are cultivated; (6) egg-carrying performance of the parents is evaluated; (7) young shrimps are cultivated indoors; and (8) offspring seeds are put into a pond. According to the method, the morphological characters related to the egg laying amount are used as breeding indexes, the egg laying amount characters of cherax quadricarinatus are indirectly selected, and the specification proportion of male and femaleparent shrimps and the matching number are adjusted, so that the problem that the egg laying amount cannot be measured in advance, egg-carrying parent shrimps are not suitable for excessive operation, the egg carrying rate is low and the like in actual production is solved, a technical scheme is provided for establishing a high-yield parent group of the cherax quadricarinatus, and a foundation islaid for realizing large-scale culture of the cherax quadricarinatus.

Description

technical field [0001] The invention belongs to the technical field of parental screening of red-clawed crayfish, and in particular relates to a parental screening and breeding method of red-clawed crayfish with high egg holding capacity. Background technique [0002] Red Claw Crawfish ( Cherax quadricarinatus ), belonging to the phylum Arthropoda, the subphylum Crustacea, the class Molecula, the subclass Eusoft, the order Decapod, the suborder Venebra, the family Pseudomonas, and the genus Slippery. Crayfish has strong adaptability, rapid growth, no obvious feeding preference, and large adult size. It can survive for a long time after leaving water, which is convenient for long-distance transportation. The market prospect is promising. As early as 1992, the Hubei Institute of Fisheries introduced red-clawed crayfish to our country, and it was first tested successfully in Guangdong and Hubei provinces. At present, the domestic red-clawed crayfish aquaculture industry is s...

AI Technical Summary

Problems solved by technology

At present, the domestic red-clawed crayfish aquaculture industry is still in its infancy. Due to problems such as the difficulty in obtaining seedlings and the lack of high-quality parents, the cultivation of red-clawed crayfish has not been effectively promoted, and there are great limitations. Therefore, breeding The production of parental populations of red-clawed crayfish with high egg production has an important role in promoting the genetic improvement of red-clawed crayfish and promoting the industrialization of red-clawed crayfish

[0003] The reproductive habits of shrimp and crabs are different from those of fish. Generally, brood shrimp will be eliminated after breeding once, so it is impossible to measure the amount of eggs in advance before using it as a parent

In addition, the red claw crayfish has the habit of laying eggs. Since the eggs are closely arranged, it cannot be accurately measured without destroying the laying structure. Moreover, because the male shrimp has no index of laying eggs, it is impossible to effectively select the male shrimp.

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