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Portunus trituberculatus grading overwintering culture method

The invention relates to a technology of swimming crabs three warts and a breeding method, which is applied to the field of grading and overwintering breeding of swimming crabs three warts, and can solve the problems of inability to accurately identify fullness, low seed yield, and low survival rate of crabs that are not full of "crab roe" during winter, so as to improve the Effects of overwintering survival rate, survival rate improvement and breeding efficiency improvement

Active Publication Date: 2020-05-15
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above-mentioned problems in the prior art that the fullness of the "crab roe" of portunus trituberculatus cannot be accurately identified and the overwintering survival rate of crabs with unfilled "crab roe" is low, and the seed yield is low, the technical problem to be solved by the present invention is to provide a three-tuberculatus A graded overwintering breeding method for portunus crabs, the method is to realize the accurate identification of female crab "crab roe" by establishing the precise identification technology of "crab roe" plumpness and formulating the "crab roe" plumpness standard, and then carry out overwintering temperature classification for species of crabs with different plumpness Cultivation, so as to improve the overwintering survival rate, oviposition rate, and oviposition quality of "crab roe" unfulfilled species

Method used

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  • Portunus trituberculatus grading overwintering culture method
  • Portunus trituberculatus grading overwintering culture method

Examples

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Embodiment 1

[0021] Surviving the winter and cultivating crabs according to conventional methods

[0022] 1) Selection of breeding crabs: From an outdoor breeding pond in early November, select female crabs with complete appendages, smooth body surface, no pathogens, and large size (≥250g) as breeding crabs; White spot syndrome virus (WSSV) is tested to ensure that the breeding crab does not carry the above-mentioned specific pathogens.

[0023] 2) Identification of "crab roe" of species of crab: Use a strong LED (10W) flashlight to irradiate the large spine of the crab abdomen, observe the illuminated part from the back of the crab, and accurately judge the fullness of "crab roe", which is divided into high fullness and medium fullness , low-fullness individuals, and use a white paint pen to make different marks on the head and breastplate; among them, the "crab roe" tissue cannot be seen in the light field of view with low fullness, such as figure 1 - image 3 As shown, the strong LED ...

Embodiment 2

[0028] Utilize technical scheme of the present invention to carry out kind of crab overwintering, cultivate

[0029] The method for selecting the species of crab is the same as in Example 1, and the identification of the species of crab "crab roe" is the same as in Example 1.

[0030] Indoor overwintering: "crab roe" individuals with high plumpness overwinter at a water temperature of 11±0.5°C, and the daily feeding amount of clamworms is 3%-5% of crab body weight; "crab roe" with medium plumpness individuals survives the winter at a water temperature of 13±0.5°C, and clamworms are fed every day The feeding amount is 5%-7% of the body weight of crabs; the water temperature for overwintering individuals with low plumpness of “crab roe” is 15±0.5°C, and the daily feeding amount of clamworms is 7%-9% of the body weight of crabs. Others are the same as in Example 1. The species of crabs enter the pond for wintering in the first ten days of November, and the pond and species of cra...

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Abstract

The invention relates to a portunus trituberculatus grading overwintering culture method, and belongs to the technical field of portunus trituberculatus culture. The method comprises the steps of establishing an accurate crab cream plumpness identification technology and formulating a crab cream plumpness standard to realize the accurate crab cream identification of female crabs, and then performing overwintering temperature grading culture on parent crabs with different plumpness. Therefore, the overwintering survival rate, the egg mass rate and the egg mass quality of the parent crabs with non-full crab cream are improved. The method has remarkable economic, social and ecological benefits.

Description

technical field [0001] The invention belongs to the technical field of Portunus trituberculatus cultivation, and in particular relates to a cultivation method for Portunus trituberculatus overwintering by classification. Background technique [0002] Swimming crab (Portunus trituberculatus) is an important marine economic animal. Because of its fast growth, large body and delicious meat, it is deeply loved by the masses and has high economic value. Therefore, as a breeding object, it is gradually developed in Jiangsu, Shandong, Fujian, Zhejiang and other places, with a breeding area of ​​500,000 mu and an output of 100,000 tons. It has become one of the leading species of marine farming in my country. "Crab roe" is rich in nutrition and delicious. It is the most valuable part of Portunus trituberculatus. Therefore, when harvested and marketed, there is a big difference in price between "crab roe" and "crab roe". The price of crab is 160 yuan / kg, and the price difference is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/59
CPCA01K61/59Y02A40/81
Inventor 高保全吕建建刘萍孟宪亮李健
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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