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A kind of domestication method to make the blue crab seedlings adapt to the cultivation in saline-alkali waters

A technology of imitating mud crabs and saline-alkali land, which is applied in the direction of climate change adaptation, application, fish farming, etc., can solve the problems of low breeding survival rate, inability to promote on a large scale, and generate economic benefits, so as to increase economic benefits and improve survival rate effect

Active Publication Date: 2022-03-04
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been experiments on saline-alkali land cultivation of blue crabs, the survival rate of the cultivation is low, and it is impossible to promote it on a large scale and generate economic benefits.

Method used

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  • A kind of domestication method to make the blue crab seedlings adapt to the cultivation in saline-alkali waters
  • A kind of domestication method to make the blue crab seedlings adapt to the cultivation in saline-alkali waters
  • A kind of domestication method to make the blue crab seedlings adapt to the cultivation in saline-alkali waters

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The pre-experiment was carried out with different developmental stages of mud crab seedlings, and it was found that the mortality rate of juvenile crabs at stage V was the lowest during the desalination process, so juvenile crabs at stage V were used for domestication. Taking the survival rate as the screening standard, the domestication method of the mud crab seedlings was finally determined, which also laid the foundation for the subsequent improvement of the survival rate of domesticated seedlings in low-alkalinity waters.

[0031] The high-efficiency acclimation method of the large-scale seedlings (V stage juvenile crab) of pseudo-cave blue crabs suitable for cultivation in saline-alkali waters with alkalinity<10mM provided by the present invention comprises the following steps:

[0032] 1) Selection and disinfection of juvenile crab seedlings in stage V

[0033] Select stage V juvenile crabs with sound limbs, strong physique, no disease, and strong vitality, and so...

Embodiment 2

[0047] The domesticated crab seedlings are cultured in saline-alkali waters (7-8mM).

[0048] Salt-alkali domesticated crab seedlings are salvaged by aquatic plants and put into a foam box, shaken loose, and the foam box is covered with wet water sponge. The size of the foam box is 50cm×50cm. A small hole with a long (about 1 cM in size) is placed in the seedling shell, and 100 crab seedlings are placed.

[0049] (7) Stocking of crab seedlings after domestication. In the process of alkalinity acclimatization, with the increase of alkalinity, the mortality rate increased, and when the alkalinity rose to 9.4mM, the mortality rate was 33.33% ( image 3 ), before putting the crab seedlings cultivated in salinization into the pond, pour part of the pond water into it, and then slowly pour it into the pond after adapting to the environment.

[0050] Compared with the cultivation of the salinity-alkalinity blue crab after domestication, the mortality rate of the crabs directly plac...

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Abstract

The invention provides a domestication method for adapting the seedlings of mud crabs to be cultivated in saline-alkali waters. The selected seedlings of mud crabs are temporarily raised in a culture pond, and then the salinity of seawater is reduced to not higher than 10‰; Put the blue crab seedlings into the seawater with a pH value of 7.0-8.5 and a carbonate alkalinity of 2.5-3.5mM, and raise the pH value of the cultured seawater to 9-10 within no less than 3 days. The carbonate alkalinity is 9.0‑9.5mM, thus completing the acclimatization. The method of the invention can effectively domesticate the adaptability of the blue crabs to saline-alkali waters, greatly improve the survival rate of the blue crabs in saline-alkali land, and increase the economic benefits of breeding.

Description

technical field [0001] The invention belongs to the technical field of breeding mud crabs, in particular to a domestication method for adapting mud crab seedlings to culture in saline-alkali waters. Background technique [0002] Scylla paramamosain belongs to the Arthropoda phylum, Crustacea, Decapod order, Portunidae. It is an important breeding economic crab in the world. It is naturally distributed and cultivated in the coasts of many countries such as Africa and Asia. Its edible part is rich in amino acids, proteins, mineral elements, fat, etc., and has high nutritional value. The burrowing blue crab likes to live in mud or ravines with low salinity such as river estuaries, inner bay intertidal zones, and mangroves. It mainly swims and crawls. It usually likes to dig holes and hides in the holes it digs during the day. Among them, they will go out to look for food at night, mainly small shells, snails, small fish and shrimps. Cave blue crab has strong adaptability, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/59
CPCA01K61/59Y02A40/81
Inventor 刘晓刘磊方伟王春琳母昌考叶央芳李荣华宋微微史策王欢
Owner NINGBO UNIV