1. Selection criteria of parent mussels Pearl mussels used for artificial propagation are called parent mussels. G
1. Selection criteria of parent mussels Pearl mussels used for artificial propagation are called parent mussels. Generally, male and female pearl mussels with complete shells, plump bodies and no external gills should be selected, and the maturity should reach over 80%.
2. Identification of male and female pearl mussels (mussels)
There is little difference in appearance e between male and female pearl mussels, so it is difficult to distinguish them, so they can be distinguished from the inside. The gonads of Hyriopsis cumingii and Anguilla rugosa are buried in the visceral sac above the axe feet and wrapped around the intestines (as are other mussels). When the gonad is mature, the gonad protein color of male mussel is white after acupuncture. The gonad of the female mussel turns yellow, and particles flow out after acupuncture.
The simplest and most effective way to tell a male from a female is to look at its gills. The gill filaments on the female branchial flap are closely arranged, and the grooves are not obvious, which are light brown and opaque. The gill filaments on the gill flap of male mussel are sparsely arranged, with obvious furrows and light yellow transparency. The density of gill filaments of female mussels is 2-3 times that of male frogs. At present, this method is mostly used to identify the sex of mussels.
3. Parent shellfish are cultivated at the end of February every year. A certain number of male and female mussels are selected from the surgical mussel temporary culture pond or pearl mussel culture pond, and the shells are marked with (female) and (male) respectively, and then alternately hung into the pond according to the ratio of male and female 12 or 1 1, with the spacing of about 10 cm. Such mating culture can improve the fertilization rate of male mussels.
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