64 results about "Crassostrea" patented technology

The invention belongs to the field of ecology and environment protection and relates to a strengthening treatment method of town heavily polluted river water in situ creatures. The method includes that a heavily polluted river reach is divided into four continuous sections of a water purification film filtering section, a biological grid filtering section, an artificial flow making section and a wetland arranging section to serve as sewage water treatment units, the sewage water firstly enters into the water purification film filtering section and automatically flows into the biological grid filtering section, a biological substrate modifying agent is released into the whole heavily polluted river reach to perform substrate modification for the whole heavily polluted river reach, the sewage water flows into the artificial flow making section and enters into the wetland arranging section, and then field snails, clams and crassostrea gigas are thrown into the river reach to implement bottom-dwelling animal control cultivation for the heavily polluted river water of the whole river reach. The method has the advantages that the river reach serves as a treated carrier, combination technologies such as micro nano bubble reaeration, efficient water purification film and biological grid filtering, river channel substrate modification, artificial flow making, floating island type wetlands and bottom-dwelling animal control cultivation are reasonably collocated, the water quality is continuously improved, and simultaneously the positive cycling of the water ecological system is achieved.

The invention discloses a breeding method for the new line of hybrid Crassostrea hongkongensis and Crassostrea gigas. According to the technical links of one generation preparation of the female Crassostrea hongkongensis and male Crassostrea gigas hybrid seed, environmental effect detection, breeding potential assessment, optimal class group selection self propagation and the like, a new line of hybrid gigas suitable to the local place can be obtained by 3-4-generation breeding. According to the breeding method for the new line of the hybrid Crassostrea hongkongensis and Crassostrea gigas, which is disclosed by the invention, gametogamy sovereignty nuisance between gigas seeds is overcome; a series of problems of slow growth speed, weak viability and exceeding sterility of hybrid F1 can be solved; the selection function on an excellent gene type by environmental stress is quickened; a breeding method suitable for the local new line of Crassostrea hongkongensis and Crassostrea gigas can be created. According to the new line bred with the breeding method disclosed by the invention, the applicable range on the temperature and the salinity by the gigas is widened, and the yield is improved by more than 30% (if being compared with parents). The breeding method for the new line of Crassostrea hongkongensis and Crassostrea gigas has the advantages of strong practicality, easiness in popularization and the like.

The invention discloses a breeding method of crassostrea gigas (black oysters) with a high melanin content in the soft parts and a proof scheme for the effectiveness of the method. The breeding method includes the following steps that by observing the color of common oysters, the oysters of which the ratio of the area of black shells to the total shell area is more than 90 percent and the lightness value V< 0.20 are selected, melanin extraction of oyster shells, melanin extraction of soft parts of the oyster shells and relation analysis of the melanin content and the melanin content of the soft parts are carried out, the applicant finds a significant positive correlation phenomenon of the color of the shells of the crassostrea gigas and the deposit rate of melanin in the pallium in the experiment process, and the blacker the shells are, the higher the melanin content of the soft parts is. By means of the breeding method of the crassostrea gigas (black oysters) with the high melanin content in the soft parts, the oysters with the high melanin content in the soft parts can be selected and bred rapidly, the breeding efficiency of the oysters is improved, and as the health-care value of melanin is accepted by the market, the new oyster species obtained through the method can increase the additional value of breeding.