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Contemporary multipoint composite breeding method for bay scallop

A technology of bay scallops and scallops, applied in the field of multi-point compound breeding of the same generation of bay scallops, can solve the problems of low breeding efficiency, easy decline in genetic diversity of breeding populations, low breeding intensity, etc., to avoid genetic drift Mutation and genetic diversity decline, speed up the selection of breeding, improve the effect of efficiency

Inactive Publication Date: 2012-04-11
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods are easy to understand and widely used, the problems they face are the small size of the basic population for breeding, low breeding intensity, high cost of breeding, low efficiency of breeding, and genetic diversity of the breeding population. Easy to fall and other issues
With the rapid development of my country's bay scallop industry, the above-mentioned breeding methods can no longer meet the industry's requirements for genetic breeding. Therefore, it is imperative to improve the traditional genetic breeding methods and improve the efficiency of selective breeding.
Up to now, there has been no report on the continuous breeding of bay scallops at multiple time points in one generation

Method used

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  • Contemporary multipoint composite breeding method for bay scallop

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Effect test

Embodiment 1

[0019] After the bay scallop spawns, the water temperature of the nursery pond for cultivating planktonic larvae is controlled at 22-24 degrees Celsius, the ammonia state does not exceed 200 mg / m3, the light is below 500 lux, continuous or intermittent aeration, and the dissolved oxygen is not less than 5 mg / m3 liters, the pH value is 7.9-8.2, and the COD is not higher than 2 mg / liter. The larvae are mainly fed with golden algae in the early stage, and the culture density is not more than 10 / ml at the beginning, and the density of larvae in the later stage is 5-7 / ml. In the later stage, the mixed bait of flat algae and golden algae is the main bait, and the mixing ratio is generally 1:1 by volume. When 1 / 3 of the seedlings in the nursery pond have eyespots, the attachment substrate is put in. As the larvae grow out of secondary shells and develop metamorphosis The bait was changed to a mixed bait of diatoms and flat algae (the ratio of feeding and feeding was 1:1 by volume), a...

Embodiment 2

[0024]After the bay scallop spawns, the water temperature of the nursery pond for cultivating planktonic larvae is controlled at 22-24 degrees Celsius, the ammonia state does not exceed 200 mg / m3, the light is below 500 lux, continuous or intermittent aeration, and the dissolved oxygen is not less than 5 mg / m3 liters, the pH value is 7.9-8.2, and the COD is not higher than 2 mg / liter. The culture density was not more than 10 / ml at the beginning, and the density of vegae larvae was 5-7 / ml in the later stage. The larvae are mainly fed with golden algae in the early stage, and the mixed bait of flat algae and golden algae in the later stage, and the mixing ratio is generally 1:1 by volume. Add appropriate amount of diatoms to the metamorphosis stage and observe the larvae's stomach under the microscope every day to determine the number and amount of bait feeding (specifically, in general, feed four times a day, the daily feeding amount is 10,000 cells / ml, observe the larvae's sto...

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Abstract

The invention relates to a method for selectively breeding bay scallop, in particular to a contemporary multipoint composite breeding method for the bay scallop. Continuous shell length head-removed selection is carried out on scallops in different growth periods in the same generation of the bay scallop, the scallop with growth advantage is selected, and further contemporary multipoint compositebreeding is realized. The invention provides a scientific and effective bay scallop fast and efficient breeding method, scale of basic population used for breeding is expanded, reduction of genetic drift and genetic diversity caused by the fact that scale of a breeding group is small in a bay scallop breeding plan is avoided; meanwhile, a multi-time point continuous breeding method is used for improving breeding strength, breeding speed can be improved, and bay scallop breeding efficiency is improved.

Description

technical field [0001] The invention relates to a method for selective breeding of bay scallops, in particular to a multi-point compound breeding method of the same generation of bay scallops. Background technique [0002] Gulf scallops belong to Phalabranchia, Heterocylinda, Scallopidae, and Scallop genus. They are native to the Atlantic coast of the United States and are an important local harvested bivalve economic mollusk. The shell is fan-shaped, the two shells are almost equal, and the shell surface is dark brown or brown. Most of the bay scallops are distributed at 3-10 meters below the sea surface. They have a more aggressive personality and a temperature range of -1-31°C. They stop growing below 5°C, grow slowly below 10°C, and grow faster at 18-28°C. Its salt-tolerant range is 16‰-43‰, and its salt-suitable range is 21‰-35‰. Bay scallops are filter feeders, they have the ability to select the size of food, but they have no ability to select the type. The main foo...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 张守都张国范李莉
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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