46 results about "Pacific oyster" patented technology

The invention provides a parent crassostrea nippona breeding method for promoting maturity and spawning. The method comprises the steps of firstly, selecting and placing parent crassostrea nippona in a nursery pond for maturity-promoting breeding; feeding the parent crassostrea nippona with crassostrea nippona monodus subterraneus bait, and conducting maturity-promoting breeding on the crassostrea nippona by raising the temperature step by step, so that gonad of the parent crassostrea nippona achieves maturity; drying the parent crassostrea nippona achieving gonad maturity in the shade, and then placing the parent crassostrea nippona into a spawning pond; picking out female mature pacific oysters through microscopic examination, taking out ova through dissection, filtering the ova with a screen, and removing tissue fragments and pacific oyster ova, so that tissue filtered fluid is obtained; adding the tissue filtered fluid into the spawning pond, and inducing the parent crassostrea nippona to spawn and discharge seminal fluid; finally, moving away the parent crassostrea nippona, so that fertilized ova of artificial breeding are obtained. By means of the method, the problems that it is difficult for parent crassostrea nippona bred through indoor artificial maturation-promoting breeding to get mature and spawn can be solved, the parent crassostrea nippona spawns quickly, spawn quality is good, the artificial breeding production requirements for the crassostrea nippona are satisifed, and the foundation is laid for large-scale production of the crassostrea nippona.

The invention provides a seed production method of a black-shell pacific oyster new strain. The seed production method comprises the following steps: firstly, two preliminarily screened shells are black with black mantles and high rate of flesh in body, and a group with a regular shell shape is taken as a core population; pacific oyster individuals with black shells, high rate of flesh in body and black mantles are selected out as an optimal population by adopting a size selection method and carry out offspring cultivation according to a conventional shellfish breeding method as a reproductive population to obtain a black-shell new strain F1; through a family line breeding mode, the black shell character is further purified to form a second-generation breeding family line F2; and finally, through continuous purification of a plurality of generations, a new strain with stable characters is obtained. According to the seed production method, the black-shell pacific oyster new strain with stable genetic character can be obtained, and the mantle melanin and the rate of flesh in body of obtained oysters in the new strain are both greatly increased.

The invention provides a northern high-temperature-resistant pacific oyster new strain culture method. Firstly, pacific oyster and crassostrea nippona parents are collected, synchronous maturity promoting culture of the parents is performed, male and female oysters are distinguished by dissection and microscopy after sexual glands of the pacific oyster and crassostrea nippona parents are synchronously mature, mature eggs of pacific oysters and semen of crassostrea nippona are acquired, cross fertilization is performed to obtain hybrid generations of the two parents, offspring is cultured after cross groups are obtained, the first hybrid generations are determined as pacific oyster and crassostrea nippona first hybrid generations by a microsatellite molecular marker technique method, the hybrid generations are self-reproduced by a butt selection method, and a plurality of generations are continuously bred to obtain a high-temperature-resistant pacific oyster new strain. The obtained pacific oyster new strain has the advantages of high temperature resistance, high survival rate, growing rapidness, high dressing percentage and the like.