Method for inducing spawning of parent Solen grandis and collecting fertilized eggs

Abstract

The invention relates to a method for inducing the spawning of the parent Solen grandis and collecting fertilized eggs. The method comprises the following steps: the parent Solen grandis which has smooth surface of shells, no mechanical damage on feet and appearance, healthy body and high activity and also has the 8-11cm length of shells is collected to perform maturation and temporary cultivation in an induced spawning pond; when the meat condition of the parent Solen grandis is up to more than 85% and the genital gland is dissected to find that sperms / eggs can flow by gravity, the induced spawning can be performed, the liquid Isochrysis galbana extract is used to cover the entire bottom surface of the pond in the induced spawning process to stimulate the parent Solen grandis for 20-25min; when spawning is performed and the density of fertilized eggs in the induced spawning pond is up to 10-15 per milliliter, and the siphon principle is utilized to fast move the fertilized eggs to a culture pond to culture. The method of the invention has the advantages that the utilization rate of the parent Solen grandis is high, the induced spawning effect is good, the fertilized eggs are convenient and fast to collect, the fertilization rate is up to 72%, the breeding survival rate is high, etc. Only a small number of parent oysters can be used so as to obtain enough fertilized eggs for artificial breeding, thus the method has good application prospect.

Description

technical field

[0001] The invention belongs to the field of artificial induced spawning and culture of brood clam broccoli, and in particular relates to a method for inducing spawning and collecting fertilized eggs of clam broccoli. Background technique

[0002] Razor razor clams are large in size, high in meat yield, high in protein content, complete in amino acid types, tender and delicious in meat, and are important marine rare shellfish that are distributed along the coast of my country, but have few natural resources. At present, razor clam products rely on harvesting of natural resources, and the market price is 60-100 yuan / kg, which is 5-10 times the price of traditional cultured shellfish. Due to the drive of market interests, high-intensity fishing has made its resources show an obvious decline trend. Therefore, it is very important to carry out research on artificial breeding and multi-culture technology of razor clam and supply more razor clam commodities to the ...

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