Method for obtaining crassostrea hongkongensis monomers through medicine induction

A Hong Kong oyster and drug technology, which is applied in the field of drug-induced acquisition of Hong Kong oyster monomer, can solve the problems of low yield per unit water body, easy damage to oyster seedlings, and low survival rate, so as to improve the rate of non-attached metamorphosis of larvae and increase the rate of non-attached metamorphosis rate effect

Pending Publication Date: 2020-04-21
GUANGXI ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings, the present invention discloses a method for obtaining Hong Kong oyster monomer by drug induction, which solves the problems that oyster seedlings are easily damaged, the survival rate is low, and the output per unit water body is low during the cultivation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for drug-induced acquisition of Hong Kong oyster monomers, comprising the following steps:

[0023] (1) Larvae cultivation: Artificial insemination, hatching and larvae cultivation are carried out in accordance with the Hong Kong Oyster Seed Breeding Technical Regulations;

[0024] (2) Screening of foot disc larvae: when 52% of the larvae had eyespots and 34.5% of the larvae stretched their feet, collect the larvae and screen the larvae with an 80-mesh silk screen to obtain a foot disc larvae with a size of 320 μm;

[0025] (3) Drug induction: Induce drug induction on the disc larvae screened in step (2), add the disc larvae to the induction solution according to the ratio of adding 20 g of disc larvae to the induction solution of 500 mL, and then place Treat in the dark for 4 hours, during which air stones are put into the induction solution, and a small amount of air is continuously filled to keep the dissolved oxygen at 6 mg / L; the induction solution is an a...

Embodiment 2

[0030] A method for drug-induced acquisition of Hong Kong oyster monomers, comprising the following steps:

[0031] (1) Larvae cultivation: Artificial insemination, hatching and larvae cultivation are carried out in accordance with the Hong Kong Oyster Seed Breeding Technical Regulations;

[0032] (2) Screening of foot disc larvae: when 48.5% of the larvae had eyespots and 38.7% of the larvae stretched their feet, collect the larvae and screen the larvae with an 80-mesh silk screen to obtain a foot disc larvae with a size of 320 μm;

[0033] (3) Drug induction: Induce drug induction on the disc larvae screened in step (2), add the disc larvae to the induction solution according to the ratio of adding 20 g of disc larvae to the induction solution of 500 mL, and then place Treat in the dark for 4 hours, during which air stones are put into the induction solution, and a small amount of air is continuously filled to keep the dissolved oxygen above 5mg / L; the induction solution is ...

Embodiment 3

[0038] A method for drug-induced acquisition of Hong Kong oyster monomers, comprising the following steps:

[0039] (1) Larvae cultivation: Artificial insemination, hatching and larvae cultivation are carried out in accordance with the Hong Kong Oyster Seed Breeding Technical Regulations;

[0040] (2) Screening of foot disc larvae: when 50% of the larvae have eyespots and 40% of the larvae have stretched their feet, collect the larvae and screen the larvae with an 80-mesh silk screen to obtain a foot disc larvae with a size of 300 μm;

[0041] (3) Drug induction: Induce drug induction on the disc larvae screened in step (2), add the disc larvae to the induction solution according to the ratio of adding 20 g of disc larvae to the induction solution of 500 mL, and then place Treat in the dark for 4 hours, during which air stones are put into the induction solution, and a small amount of air is continuously filled to keep the dissolved oxygen above 5mg / L; the induction solution i...

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PUM

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Abstract

The invention discloses a method for obtaining crassostrea hongkongensis monomers through medicine induction. The method comprises steps of cultivating larvae, screening larvae at foot and face growing stage, performing medicine induction, performing cultivation with descending flows, performing juvenile mollusk management and the like. Cultivation is performed according to the crassostrea hongkongensis fry breeding technical regulations, larvae are screened to obtain larvae at foot and face growing stage of which the specifications are 300-350[mu]m, then the larvae at the foot and face growing stage are induced with inducing liquid, then cultivation is performed with the descending flows, and after 8-10 days, crassostrea hongkongensis monomer juvenile mollusks of which the shell height is1-2mm can be obtained. According to the method disclosed by the invention, through medicine stimulation, the larva at the foot and face growing stage can be smoothly induced, low distortion ratio andsecondary hurt during base removal are avoided, the non-adherence distortion ratio of the larvae is greatly increased, the distortion ratio of the larvae is 60% or above, the larvae which are not successfully induced can be recovered for continuous cultivation, after feet appear, induction is performed anew, and the problems that crassostrea hongkongensis fries are easy to damage, the survival rate is low and the yield in unit water body is low in breeding process can be solved.

Description

technical field [0001] The invention belongs to the technical field of shellfish culture, and in particular relates to a method for obtaining Hong Kong oyster monomers through drug induction. Background technique [0002] Hong Kong Oysters ( Crassostrea hongkongensis ), formerly known as "near river oyster" and local name "big oyster", is an important marine biological resource. Its meat is delicious and has high nutritional value, and it is known as "milk in the sea". The living state of oysters is grouping, and often several are fixed together. Due to the excessive local density, the growth space is limited, and the shell shape of the adult body is extremely irregular, which greatly affects the growth rate and the economic value of breeding. [0003] Scholars at home and abroad have mainly focused on oyster monomers such as long oysters, Kumamoto oysters, Fujian oysters, and American oysters. Hong Kong oyster monomers are still obtained through traditional oyster farming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/54
CPCA01K61/54Y02A40/81
Inventor 张兴志李琼珍官俊良张立彭金霞韦嫔媛何苹萍
Owner GUANGXI ACADEMY OF FISHERY SCI
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