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Method for spawning, hatching and incubating scapharca subcrenata larvae in seawater disinfected by bleaching solution

A technology for sterilizing seawater and bleaching solution, applied in application, climate change adaptation, fish farming and other directions, can solve the problems of unstable spawning and hatching and larval cultivation, larvae sinking and dying, and seed shells cannot spawn normally. The effect of smooth and stable incubation and cultivation, and normal and stable growth

Inactive Publication Date: 2012-04-18
JINZHOU MARINE FISHERY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After more than ten years of development, artificial breeding of clams (Scapharca subcrenata) is relatively unstable in spawning hatching and larvae cultivation. Many nursery manufacturers want to raise seedlings, but in unsterilized seawater, seedlings cannot spawn normally, or Although it can lay eggs, the larvae often sink and die

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Pump the clam seedling water with blackened water quality to the indoor seedling pond, add bleaching solution, make the available chlorine in the pond reach 20ppm, and settle for 48 hours.

[0012] Pump the seawater after precipitation into another nursery pond, neutralize residual chlorine with sodium thiosulfate, and test with chlorine test paper until there is no residual chlorine in the water.

[0013] Inflate air into the nursery pond and throw single-cell algae at an amount of 20,000 / ml. When white fine bubbles appear on the water surface, put the seedlings into the hatching to spawn and hatch. The amount of seedlings is 6 / m 3 . After hatching, they were bred in sterilized seawater and grown to 1000 μm in 41 days, with a survival rate of 35%.

Embodiment 2

[0015] Pump the clam seedling water with black water quality to the indoor seedling pond, add bleaching solution, make the available chlorine in the pond reach 30ppm, and settle for 72 hours.

[0016] Pump the seawater after precipitation into another nursery pond, neutralize residual chlorine with sodium thiosulfate, and test with chlorine test paper until there is no residual chlorine in the water.

[0017] Inflate air into the nursery pond, and throw single-cell algae at an amount of 30,000 / ml. When white fine bubbles appear on the water surface, put the seed shells into them to hatch and hatch. The amount of seed shells input is 8 / m 3 . After hatching, they were selected and cultivated in sterilized seawater, and grew to 1000 μm in 45 days, with a survival rate of 30%.

Embodiment 3

[0019] Pump the clam seedling water with blackened water quality to the indoor seedling pond, add bleaching solution, make the available chlorine in the pond reach 25ppm, and settle for 60 hours.

[0020] Pump the seawater after precipitation into another nursery pond, neutralize residual chlorine with sodium thiosulfate, and test with chlorine test paper until there is no residual chlorine in the water.

[0021] Inflate the air into the nursery pond, and throw in unicellular algae at an amount of 25,000 / ml. When white fine bubbles appear on the water surface, put the seed shells in to hatch and hatch them. The amount of seed shells input is 7 / m 3 . After hatching, they were bred in sterilized seawater and grown to 1000 μm in 43 days, with a survival rate of 33%.

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Abstract

The invention relates to a method for spawning, hatching and incubating scapharca subcrenata larvae in seawater disinfected by a bleaching solution. The method comprises the following steps of: under the condition that the water quality of the seawater for the seedling raising of scapharca subcrenata is blackened or a water surface has a large amount of foam, pumping the seawater to an indoor seedling raising pond, adding the bleaching solution, so that available chlorine in the pond is between 20 and 30 ppm, and precipitating for 48 to 72 hours; after precipitating, pumping the seawater to the other seedling raising pond, neutralizing residual chlorine by using sodium thiosulfate, and testing by using chlorine measuring test paper until the residual chlorine in the water is removed; introducing air into the seedling raising pond, putting unicellular algae in the addition quantity of between 0.02 and 0.03 million / milliliter; and after the water surface has white superfine air bubbles, putting breeding shellfish into the seedling raising pond in the addition quantity of 6 to 8 shellfish / m<3>, so that the breeding shellfish spawn and hatch, and breeding the hatched shellfish in the disinfected seawater after hatching. By the method, the problems that spawning and incubation of the scapharca subcrenata and the culture of the larvae are unstable are solved when the bacterium content of the seawater exceeds the standard; and the scapharca subcrenata can be grown to the length of 1,000 micrometers within 41 to 45 days, and the survival rate is between 30 and 35 percent.

Description

technical field [0001] The invention relates to a method for raising clam seedlings, in particular to a method for using bleach to sterilize seawater to lay eggs and hatch and cultivate clam larvae. Background technique [0002] After more than ten years of development, the artificial breeding of clams (Scapharca subcrenata) is relatively unstable in terms of spawning hatching and larvae cultivation. Many nursery manufacturers want to raise seedlings, but in unsterilized seawater, seedlings cannot spawn normally, or Although they can lay eggs, the larvae often sink and die. The main reason for the above phenomenon is that the bacterial content in the water seriously exceeds the standard. How to make clam seedlings grow smoothly under the condition of poor water quality is an urgent problem to be solved at present. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for sterilizing seawater with blea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 朱守维梁维波杜尚昆杨玉香杨光郑国富杜桂芝邵跃张洪民陈立国梁鹏周文良
Owner JINZHOU MARINE FISHERY INST
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