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Method for hastening parturition of shellfishes by sterilized and neutralized sea water

A seawater and labor induction technology, applied in chemical instruments and methods, seawater treatment, application and other directions, can solve the problems of low reuse rate of seed shellfish, cumbersome operation, high cost, etc. Good results

Inactive Publication Date: 2015-01-07
营口现代渔业科技产业园 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problems of cumbersome operation, long time, high cost and low reuse rate of seed shellfish.

Method used

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  • Method for hastening parturition of shellfishes by sterilized and neutralized sea water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] On June 12, 40 green clam species were selected and the surface of the shell was washed with seawater. Place in the indoor nursery pond. The nursery pond is 5 meters long, 2 meters wide, and 1 meter high. The sand filter water depth in the pool is about 0.9 meters. Natural water temperature, change the water to clear the bottom once a day, and cast bait twice a day. Half a month later, the seed shells were dissected and the plumpness reached 91%. Microscopic examination of the gonads revealed that the gonads were mature.

[0014] Seawater treatment for shellfish induction: lead the outdoor seawater into the sedimentation tank, settle for 12 hours, and then be filtered by sand filter and 300 mesh screen and then introduced into the indoor storage tank, add sodium hypochlorite or bleach powder for disinfection, the effective chlorine concentration in the water is 50mg / L, and mix well After that, let it stand for 8 hours, sprinkle saturated sodium thiosulfate solution and ...

Embodiment 2

[0017] In mid-April, 100 large razor clams were selected and placed in 10m with 1m deep sand and filtered seawater. 2 ×1 indoor nursery pond, natural water temperature, full water change every day, clearing the bottom once. During this period, the feed is mainly fresh Nitzschia and Chlorella, feed density is 30000cell / mL, daily feed Bait 2 times.

[0018] On May 5, the seed shells were dissected, the plumpness was 90%, and the gonads were mature under microscope.

[0019] Seawater treatment for inducing labor: outdoor seawater sedimentation and standing for 15 hours. After sand filtering, it is connected to the indoor storage tank through a 300-mesh screen, and sodium hypochlorite or bleaching powder is added for disinfection. The effective chlorine concentration in the water is 70mg / L, and the mixture is evenly mixed and then left for 8 hours. Use saturated sodium thiosulfate solution to neutralize and eliminate residual chlorine before inducing labor, and the dosage is based on t...

Embodiment 3

[0022] On May 19th, 40 four-cornered clam species were selected and placed in 10m with 1m deep sand and filtered seawater. 2 ×1 indoor seedling ponds are kept temporarily, at natural water temperature, the water is fully changed every day, and the bottom is cleared once a day. During this period, fresh Chaetoceros and Chlorella are the main feeds, and the feed density is 10,000 / mL, daily Bait 2-3 times.

[0023] On June 23, the seed shells were dissected, the plumpness was 92%, and the gonads were mature under microscope.

[0024] June 24: Outdoor seawater sedimentation and standing for 12 hours. After sand filtration, it is connected to the indoor storage tank through a 300-mesh screen, and sodium hypochlorite or bleaching powder is added for disinfection. The effective chlorine concentration in the water is 80mg / L. After mixing, let it stand for 8 hours. Use saturated sodium thiosulfate solution to neutralize and eliminate residual chlorine before inducing labor, and the dosage i...

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Abstract

The invention relates to parturition hastening methods for shellfish products, in particular to a method for hastening parturition of shellfishes by sterilized and neutralized sea water. According to the method, outdoor sea water is sedimented in a sedimentation tank, sodium hypochlorite or bleaching powder are added for sterilization, sodium thiosulfate is used for neutralizing residual chlorine in the water, water in a nursery pond is firstly drained off during parturition hastening, the neutralized sea water is injected into the nursery pond until the sea water submerges seed shellfishes, air inflation and oxygenation are performed, the seed shellfishes are added immediately once spawning of the seed shellfishes is discovered, and the sea water is injected until the pond is filled with the sea water. The method is simple, and easy to implement. The method has the advantages of short time, high parturition hastening rate and good effect in terms of shellfish parturition hastening. The method belongs to methods for changing growing environmental conditions of the seed shellfishes, but the method is slow and gentle and does not cause intense stimulation and damage to the seed shellfishes. Indexes such as fertilized-egg hatching rate, metamorphosis rate and blood-shellfish repeating utilization factor are increased by 20% as compared with those in the prior art. The problems of shellfish source shortage and difficulty in seed breeding during shellfish product production are solved indirectly.

Description

Technical field [0001] The present invention relates to a method for inducing spawning of shellfish and seafood, in particular to a method for inducing spawning of shellfish by using disinfected and neutralized seawater. Background technique [0002] At present, the seafood farming industry at home and abroad is developing rapidly. In order to improve economic efficiency, breeding units and scientific research institutions have made great efforts to increase the production of expensive shellfish. In order to increase the number of spawning batches and increase the number of breeding individuals, research has introduced many methods for inducing spawning of seed shells. Among them, there are methods to change the growth environment of the species such as shade drying, running water, heating, ammonia sea water and so on. There are also methods of external stimulation such as mechanical shock, sun exposure, electric current stimulation, ultraviolet radiation, and chemical injection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00C02F9/04C02F103/08
CPCY02A40/81A01K61/54C02F9/00C02F2103/08
Inventor 曹琛王永波李晓冬邢佐平刘贵强郝咏芳蔡恒辉黄金勇
Owner 营口现代渔业科技产业园
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