Yunlong spot was cultivated successfully.

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The picture shows Yunlong spot.

A few days ago, the project "Yunlong spot breeding population, Family Establishment and Fine Seedling cultivation" jointly carried out by the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fisheries Sciences and Shandong Laizhou Mingbo Aquatic products Co., Ltd. passed the on-site acceptance of experts, which marks the success of Yunlong spot artificial cultivation.

The preparation for artificial cultivation of Yunlong spot began in 2010. from the previous technical reserve, the research of sperm cryopreservation technology, the cultivation of breeding fish to the breakthrough of artificial reproduction technology, the first hybrid Yunlong spot was born in 2014. The research team led by Tian Yongsheng has solved numerous problems in four years. "We just want to cultivate a new variety with fast growth, low deformity rate and delicious meat at the same time." Tian Yongsheng told the author that the hybrid Yunlong grouper has both the above advantages. Its hybrid male parent is the saddle grouper, also known as gentian grouper, which is the largest grouper species, and wild individuals can weigh up to several hundred jin. The female parent is moire grouper with delicious meat, which is the only grouper species that can be used to make sashimi. It is widely exported to Japan, South Korea and other countries, and the market price is as high as 140 yuan / jin in Fujian and other places.

Most grouper species grow in the high temperature waters of Southeast Asia, while the mother grouper of Yunlong grouper is the northernmost grouper species in China, which is tolerant to low temperature and can grow in Fujian waters of China. As a cultured species, moire grouper has delicious meat, but it grows slowly and has high requirements for culture environment. It generally takes 3 ~ 5 years to meet the specifications for export to Japan and South Korea. Judging from the current breeding situation, the newly cultivated Yunlong grouper grows fast and can weigh more than 1 jin in 8 months to 10 months. after two years of breeding, the body weight can reach more than 3 kilograms. "now it has been recognized by customers in Japan, South Korea and other countries. The delicious degree of meat is as delicious as moire grouper, which can be used as sashimi instead of moire grouper."

"the water temperature required for Yunlong grouper culture is about 18 ℃, which is much lower than the 25 ℃ water temperature for common grouper, which can reduce the culture cost." Mao Dongliang, the relevant person in charge of Laizhou Mingbo Fisheries Company, told me that at present, the artificial cultivation of moire grouper has a high deformity rate and a low survival rate, and the newly cultivated dragon grouper has overcome this shortcoming. In the next step, they will gradually expand the seedling cultivation scale and culture scale of Yunlong grouper, and push the new varieties to the market. At present, Yunlong spot in Fujian area of the effluent price of more than 50 yuan / jin, "in farmed fish is a high price, the current market response is good."

The author learned that at present, there are more than a dozen species of grouper that can be artificially cultivated, and grouper culture is mainly concentrated in the waters of Fujian. At present, Laizhou Mingbo aquatic products can cultivate 9 kinds of grouper fingerling, which are mainly sold to the south, among which spotted sea bream and rat dragon spot are the main species. "in terms of artificial culture, pearl gentian grouper and green grouper are currently the most cultivated species in the southern region. with the gradual promotion of new species, Yunlong grouper will gradually open up the market and occupy a place in the grouper culture market." Mao Dongliang said.

A few days ago, the project "Establishment and Application of Germplasm Cell Frozen Storage of Epinephelus Epinephelus" completed by Huanghai Fisheries Research Institute and Laizhou Mingbo Fisheries Co., Ltd. has also passed the on-site acceptance of experts since 2010. gradually mastered the sperm cryopreservation techniques of six species of grouper, including grouper, brown grouper, grouper, etc. More than 2000 sperm of the above 6 species of grouper were cryopreserved. The project has established the first frozen storage of grouper sperm in China, which will play a strong supporting role in the cultivation of new species and industrial development of grouper in China.