Crossbreeding method of mud crab

A technology of hybrid breeding and mud crab, applied in fish farming, application, climate change adaptation, etc., can solve problems that have not been genetically improved, and achieve good stress resistance, excellent stress resistance traits, and simple methods

Active Publication Date: 2013-01-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the seedlings needed for blue crab farming come from wild seedlings, which have not been genetically improved.

Method used

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  • Crossbreeding method of mud crab
  • Crossbreeding method of mud crab

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Experimental program
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Effect test

Embodiment 1

[0015] (1) Cultivation pond construction: Choose a coastal area where the water quality meets the requirements of aquaculture, and the source of sea and fresh water is convenient. The cultivation pond covers an area of ​​1.2 acres, surrounded by a 1.5-meter-wide ring ditch, which can keep the water depth above 1.5 meters, and a 0.5-meter high anti-escape net is built around the pond.

[0016] (2) Purchase of breeding crabs: 15-20 days before mating of blue crabs, breeding crabs are required to be physically strong and have complete appendages. Purchase 50 male crabs weighing 350-400 grams and weighing 200-300 grams in Hangzhou Bay. 100 female crabs; at the same time, buy 50 male scylla crabs weighing 350-400 grams and 100 female crabs weighing 350-400 grams in Sanmen Bay.

[0017] (3) Male and female mating: According to the positive and negative hybridization, the ratio of female and male scylla crabs is 2:1, and they are put into 2 open-air ponds for natural mating. The feeding ...

Embodiment 2

[0027] The breeding pond is located in the coastal area of ​​Sanmen Bay. The source of seawater is convenient, the salinity is about 10‰, the pond area is 16-20 acres, and there are ring grooves around it. It is a polyculture mode of blue crab, spine-tailed white shrimp, and constrictor clam. Artificial breeding of scylla hybrid seedlings, cultivated into C by intermediate 3 ~C 4 Later, the pond was stocked from June 10 to 11, with an average stocking of about 700 per mu. The feed was mainly chilled small trash fish. After 3 months of breeding, the catch started on September 5 of that year and ended on November 16.

[0028] The 3 experimental ponds had a total area of ​​54.6 mu of crabs, 38,200 crabs were stocked, with an average of 699.6 crabs per acre, and a total of 13,504 crabs were collected, with an average growth rate of 35.3%. Sea area C with traditional stocking 1 ~C 2 Compared with the growth rate of juvenile crabs (generally around 10%), it has increased by more than 2...

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Abstract

The invention provides a crossbreeding method of the mud crab. Inter-species different geographic populations of the mud crab are hybridized and bed to obtain artificial hybrid fry of the mud crab. The crossbreeding method of the mud crab inherits fine traits of both parents and has the advantages that stress resistance is high, breeding survival rate is high and the like. The bred fry of the mud crab have fitting traits and have better stress resistance than the fry of the mud crab in the sea. The bred fry of the mud crab can be widely used for breeding of fine breeds of the mud crab, and growth speed, stress resistance and breeding survival rate of the mud crab are increased. The crossbreeding method of the mud crab is reasonable in design, simple to operate, highly operable and applicable to production.

Description

Technical field [0001] The invention belongs to the field of aquatic genetic breeding, and particularly relates to a hybrid breeding method between different geographical groups of scylla crabs. Background technique [0002] Scylla crab is one of the important marine aquaculture crabs in my country. It has high economic value and huge market demand. my country's coastal areas such as Guangdong, Zhejiang, and Fujian began artificial breeding as early as the late 1980s. In recent years, the blue crab breeding industry in my country has developed rapidly and has become a major marine aquaculture species in the southern coastal provinces of my country, with a breeding area of ​​600,000 mu and an annual output of 110,000 tons. At present, most of the fry needed for the breeding of blue crab comes from the wild fry that has not been genetically improved. During the breeding process, blue crabs have experienced poor stress resistance, decreased disease resistance, and frequent large-sc...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 舒妙安泮华友徐礼明
Owner ZHEJIANG UNIV
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