Bay scallop laying eggs and hatching method

Abstract

The present invention relates to a bay scallop oviposition and hatching method. Said method includes the following steps: before oviposition, firstly seeting a preoviposition pool, placing seed scallops into said preoviposition pool for 30-40 min, making defecation and discharging other secrete, making bay scallops discharge spermatozoa for 5-15 min; when the individual seed scallop oviposits, placing the seed scallop into oviposition pool to make oviposition, after the ova density is reached to 50-60 / ml, placing all the seed scallops into another oviposition pool to make continuous oviposotion; after part of seed scallops discharges spermatozoa, promptly placing said seed scallops into other pool to make continuous culture; then washing ova, making cultivation and making hatching, the hatching water temperature is 22-25deg.C.

Description

technical field [0001] The invention relates to a method for artificial spawning and hatching of shellfish, in particular to a method for laying eggs and hatching of bay scallops. Background technique [0002] Bay scallops were introduced from the United States in the 1980s. Due to their fast growth, they can be harvested in the same year of breeding. Moreover, they have high yields and significant economic benefits, and are deeply loved by the majority of farming users. At present, it has become one of the three major scallop breeding species in my country, and a large number of seedlings need to be produced every year to supply farming users. The artificial breeding of bay scallops has always been one of the hot spots in shellfish breeding. Because bay scallops are hermaphroditic, spawning and sperm production are basically carried out at the same time, which is uncontrollable, and it is easy to cause too many sperms. Too many sperms can easily lead to an increase in the d...

AI Technical Summary

Problems solved by technology

Because bay scallops are hermaphroditic, spawning and sperm production are basically carried out at the same time, which is uncontrollable, and it is easy to cause too many sperms. Too many sperms can easily lead to an increase in the deformity rate of embryonic development and a decrease in hatching rate. Under the incubation temperature of ℃, it is easy to cause water quality to deteriorate, and also affect the hatching rate and the survival of larvae. Therefore, the hatching rate of bay scallops is not high, generally in the range of 0-40%. It is necessary to purchase a large number of seed shells for cultivation, which will increase the cost of seedling cultivation and affect the success rate and emergence of seedlings