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Method for improving survival rate of crab seedlings of scylla paramamosain through desalination

A technology for the survival rate of the pseudo-cave mud crab, which is applied in the field of effectively improving the survival rate of the desalination of the pseudo-cave mud crab seedlings, so as to achieve the effect of improving the survival rate and increasing economic benefits

Inactive Publication Date: 2019-11-19
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not suitable for the desalination culture of mud crabs. Using this method to desalinate and cultivate mud crabs, the mortality rate of crab larvae is above 20%.

Method used

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  • Method for improving survival rate of crab seedlings of scylla paramamosain through desalination

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for improving the survival rate of mud crab seedlings, comprising the following steps:

[0034] (1) Preparation of crab seedling ponds: Prepare two cement ponds, one is used as a reservoir for regulating seawater and facilitating water exchange, and the other is used as a crab seedling pond for desalinating crab seedlings.

[0035] Follow the steps below to treat the crab pond:

[0036] (a) Disinfect and clean the crab seedling pool; the disinfection method is: use bleaching powder to disinfect, and then use sodium bicarbonate to neutralize.

[0037] (b) Lay commercially available aeration facilities.

[0038] (c) Inject seawater into the crab seedling pond, adjust the salinity to 12‰, and filter the seawater after sedimentation, bleaching powder disinfection, and dechlorination, so that the seawater depth in the crab seedling pond is 0.2m.

[0039] (d) Setting up artificial concealment. The artificial shelter is reed grass, which is easy to obtain and can b...

Embodiment 2

[0047] Prepare more than 6,100 young crabs in each developmental period, according to the method for desalinating and cultivating in Example 1, send the disinfected young crabs into the young crab pool, and the density of young crabs is 700 / m 3 After adapting the crab seedlings to a salinity environment of 12‰ for 6 hours, the salinity of the crab seedling pool was slowly reduced to 8‰ at a rate of 2‰ / 6h, and then dropped to 1‰ at a rate of 1‰ / 6h. ‰-2‰ salinity. See the number of surviving crab seedlings figure 1 , and as shown in Table 1 statistics of crab seedling mortality.

[0048] Table 1. Mortality rate of desalinated crab seedlings of Scylla pseudocavena during desalination culture

[0049] Salt concentration 12‰-8‰ 8‰-4‰ 4‰-2‰ 2‰-1‰ mortality rate 0.49％ 0.76％ 1.46％ 1.69％

[0050] Depend on figure 1 As can be seen from Table 1, the exploration of the desalinated culture conditions of mud crabs by the present invention has greatly increased...

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Abstract

The invention discloses a method for improving the survival rate of crab seedlings of scylla paramamosain.The method comprises the following steps: (1) preparing a crab seedling pond: preparing two cement ponds with one used as a reservoir for adjusting sea water and facilitating water change, and the other one used as the crab seedling pond for desalinating the crab seedlings; (2) preparing the crab seedlings; (3) disinfecting the crab seedlings; (4) performing desalination culture on the crab seedlings; (5) packaging and transporting the crab seedlings; (6) putting the crab seedlings into abreeding pond. By utilizing the method disclosed by the invention, through the desalination culture of the scylla paramamosain before stocking, the survival rate of the fed scylla paramamosain is greatly improved, and the economic benefit of breeding is increased.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for effectively improving the desalination survival rate of mud crab seedlings. Background technique [0002] The blue crab is bright and blue in color, with a thin shell and large claws. It looks plump as a whole, and the meat is tender and fragrant when eaten. It contains 18 kinds of amino acids, and every 100 grams of edible part contains 14.0 grams of protein, 2.5 grams of fat, 0.8 grams of carbohydrates, 135 mg of calcium, 139 mg of phosphorus, 13 mg of iron, and 5980 international units of vitamin A. The blue crabs produced in June and July (weighing about 150-350 grams) have a unique fragrance when eaten. [0003] Scylla pseudocave has extremely high medicinal value. The meat and internal organs can cure scabies, dermatitis, clear sores, damp heat, postpartum hemorrhage, etc. Long-term consumption has the effect of diuresis, swelling, nourishing y...

Claims

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Application Information

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IPC IPC(8): A01K61/59A01K63/00A01K63/04A01K63/10
CPCA01K61/59A01K63/003A01K63/04A01K63/042A01K63/10Y02A40/81
Inventor 姚宏志王欢唐蕾李幸王春琳母昌考史策
Owner NINGBO UNIV
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