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Method for preventing pinna pectinata larvae from floating upwards and adhering

A technology for larvae and larvae, which is applied in the field of bivalve seed production in aquaculture, can solve the problems of low larvae cultivation efficiency and reduced cultivation density, reduce the probability of larvae floating and sticking, reduce floating sticking, The effect of improving the survival rate

Active Publication Date: 2010-06-09
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Reducing the breeding density can partially solve the problem of larvae floating and sticking, but the larvae breeding efficiency is too low, and the general breeding density is less than 1 / ml

Method used

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  • Method for preventing pinna pectinata larvae from floating upwards and adhering
  • Method for preventing pinna pectinata larvae from floating upwards and adhering
  • Method for preventing pinna pectinata larvae from floating upwards and adhering

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Embodiment

[0022] The present invention provides several typical embodiments taking the larvae of Pleurotus chinensis as an example, but the present invention is not limited to the following examples.

[0023] 1. The cultivation effect of the small-scale cultivation pond (table 1)

[0024] Table 1

[0025]

[0026] The conditions of the above examples are the suitable conditions for cultivating the larvae of P. chinensis, that is, water temperature: 18-28°C, salinity: 25-35‰, pH value: 7.0-8.5, and the bait for the single-cell algae is golden algae, diatoms or flat algae. algae.

[0027] Such as figure 1 As shown, the length (a)×width (b)×height (c) of the cultivation pond is 4.0m×3.0m×1.2m, the cultivation water depth is 1.0m, and the cultivation water body is 12.00m 3 , The density of larvae is 4-5 / ml. In this embodiment, two wave-making pumps 1 are installed on the wall in the width direction of each cultivation pool 4, distributed in a diagonal shape, and the distance between ...

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Abstract

The invention relates to aquaculture bivalve offspring seed production, in particular to a method for preventing pinna pectinata larvae from floating upwards and adhering. Two wave-making pumps are arranged in a diagonal shape on the pond wall of a culture pond in a width direction; waves and water flows which are generated by the wave-making pumps are used for dispersing the pinna pectinata larvae so that the pinna pectinata larvae are uniformly distributed in the culture pond, thus the pinna pectinata larvae are prevented from floating upwards and adhering; 24 hours after pinna pectinata fertilized ovums are incubated into D-shaped larvae, when the D-shaped larvae float upwards and are adhered, the wave-making pumps are installed; the proper power of the wave-making pumps is 12-30 W, the proper flow rate is 5-10 m3 / h, the proper distance horizontally kept between the water outlet centers of the wave-making pumps and a water surface is 15-25 cm, and the proper distance between the water outlet centers of the wave-making pumps and the adjacent pond wall of the culture pond is 20-40 cm. The invention can reduce upward floating and adhesion ratio matched groups of the pinna pectinata larvae more than 80 percent, enhance the survival rate by 80 percent without obvious adverse effect on the growth of the larvae and achieve the culture density of the larvae by 4-5 / ml, thereby effectively enhancing the survival rate and the culture efficiency of the pinna pectinata larvae.

Description

technical field [0001] The invention relates to the production of bivalve mollusc seedlings in aquaculture, in particular to a new method for preventing the larvae from floating and sticking together. Background technique [0002] Atrina pectinata (Linnaeus, 1767) belongs to the phylum Molluscs, Bivalvia, Mytilidae, Atrinaceae, and the genus Atrina pectinata. It has a wide natural distribution in coastal areas of China and is a species of high economic value. Large-scale edible shellfish are widely distributed in temperate and tropical muddy offshore waters, and are distributed in the Bo, Huang, East and South China Seas. Its posterior adductor muscle is particularly hypertrophic, and it can be made into the precious "Jiang Yaozhu", which is a nutritious and delicious sea treasure. The region is very popular. [0003] In recent decades, due to overfishing and the deterioration of environmental conditions, the resources of C. chinensis in my country have declined sharply, a...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 张涛杨红生邱天龙吴厚刚王诗欢张立斌刘保忠刘鹰周毅
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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