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Seed production method of Philippines little clam breeding lines

A Philippine clam and clam technology, applied in the field of shellfish farming, can solve the problems of low survival rate, slow growth, small individuals, etc., and achieve the effect of fast growth and high survival rate

Inactive Publication Date: 2008-10-22
DALIAN FISHERIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is found that with the growth of age, the proportion of p / p and p / n types increases, and the proportion of n / n types decreases rapidly, and the n / n type individuals are small, grow slowly, and have a low survival rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Source and selection of broodstock: In June 2003, from wild populations (cultured populations), 2-year-old clams with regular shell shapes and consistent shell colors were selected from wild populations (cultured populations) of Liangdaohong, Haiyanghong and Zebra clams. 20 as a breeding group.

[0023] b. Spawning and hatching: place clams of different shell color strains separately, dry in the shade for 4 hours, and stimulate running water for 1 hour, and put them in a 100L white plastic bucket with fresh seawater. After about 2-4 hours, each group is almost All spawn. In order to improve the hatching rate, the hatching density is controlled at 30-40 / ml, and hatching in buckets is adopted. Under the condition of temperature 22-23 ℃, after about 25 hours, all hatched to D-shaped larvae.

[0024]c. Larvae culture: D-shaped larvae were selected and bred in net cages made of 300-mesh sieve tulle, and placed in white plastic buckets for cultivation. The larva culture...

Embodiment 2

[0029] a. Source and selection of broodstock: In September 2005, from wild populations (cultured populations), 2-year-old shellfish with regular shell shape and consistent shell color were selected from the wild population (cultured population) with two reds, two whites, and agate black. 20 each of , ocean red, pearl white, zebra clam and corrugated clam are used as breeding groups.

[0030] b. Spawning and hatching: place clams of different shell color strains separately, dry in the shade for 4 hours, and stimulate running water for 1 hour, and put them in a 100L white plastic bucket with fresh seawater. After about 2-4 hours, each group is almost All spawn. In order to improve the hatching rate, the hatching density is controlled at 30-40 / ml, and hatching in buckets is adopted. Under the condition of temperature 22-23 ℃, after about 25 hours, all hatched to D-shaped larvae.

[0031] c. Larvae culture: D-shaped larvae were selected and bred in net cages made of 300-mesh sie...

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PUM

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Abstract

The invention relates to a method of preparation seeds of breeding lines of ruditapes philippinarum. The qualitative character of shell color is used as the marker, and ruditapes philippinarums with different shell colors are used as raw material, and then the breeding lines with advanced characters are obtained by directive breeding of successive generations. More particularly, the shell colors and lines include two-red-strip, two-white-strip, black onyx, oceanic red, pearl white, zebra clam and ripple clam; due to directive purity of a plurality of generations, the lines of pearl white, oceanic red and two-red-strip which grow fast and the lines of zebra clam with strong stress resistance are screened out. The breeding lines of the invention has the characteristics of fast growth or high livability, thus establishing certain foundation for the hybridization of shell color and lines of ruditapes philippinarum as well as breed improvement.

Description

technical field [0001] The invention belongs to the category of shellfish culture, and in particular relates to a seed production method of Philippine clams. Background technique [0002] The Philippine clam (Ruditapes philippinarum) belongs to the bivalve clam family, the brocade subfamily, and the clam genus, and belongs to the wide-temperature and wide-salt species. At present, about 90% of the world's about 2 million tons of Philippine clam production comes from farming, and it mainly comes from farming in mainland China (Goulletquer 1997). In 1999, the output of tidal flat shellfish in my country was 2.464 million tons, of which 73% were Philippine clams, accounting for about 18.4% of the total output of mariculture in my country. With the improvement of people's living standards, the domestic and foreign markets are in short supply, and the market potential is huge. However, due to lack of attention to resource protection and indiscriminate harvesting, its natural ou...

Claims

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Application Information

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IPC IPC(8): A01K61/00A23K1/18A23K50/80
CPCY02A40/81
Inventor 闫喜武张跃环杨凤张国范张澎潘发林张力群
Owner DALIAN FISHERIES UNIVERSITY
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