subject: 100 000 Yu Mei Chinese Sturgeon "test [print this page] Yesterday, thousands of Chinese sturgeon over the end of "test tube babies," Chinese Sturgeon Research Institute in Gezhouba (Yichang) break eggs out.
Introduced by the engineer of the Tian Yuan, 1 month, researchers will be more than 30 pieces of sturgeon eggs placed in incubators. After 120 hours of artificial incubation, 15 am yesterday, more than the end of the first of thousands of Chinese sturgeon seedlings born. Spring and summer of next year, these sturgeon seedlings weigh 500 grams; and is expected to be released next winter flow of the Yangtze River fishing.
Chinese sturgeon is a rare and unique species in China, the state-level protected species, are listed as endangered species, the World Conservation Union. August 2004, the World Conservation Monitoring Centre issued a report that the Chinese sturgeon amount of resources (up to spawning mantissa) is less than 3000, and the sharp decline at an alarming rate.
Since 1982, Chinese Sturgeon Research Institute has been engaged in the work of artificial propagation of sturgeon, 20 years, Chinese sturgeon were released into 450 10 000 seedlings.
Previously, Yichang City, the Chinese sturgeon declared the Beijing Olympic mascots, with the giant panda, Tibetan antelope, the South China tiger, "Monkey King" and other race, the results 11th of this month ( ) announced.
Cretaceous giant water warrior
Commonly known as the water giant Chinese sturgeon, Yangtze River fish king on earth one of the oldest vertebrates in the life on Earth 140 million years ago has been compared to the survival of giant panda's still long. Therefore, people will call it contemporary fossils.
2 November morning, reporters saw three in the Institute of Chinese sturgeon catch up was just wild Chinese sturgeon. They were prism head, tail, such as brooms, head hidden under the flat mouth, accompanied by four beard, back grayish brown, gray belly. Different from modern fish, sturgeon skin, no scales, thick skin, body surface distribution of 5 rows of bony plates, from afar, just like water warriors wearing yellow armor.
Sturgeon to feed on fish and shrimp, about a year growth of 12.5 kg to 15 kg. Its life is generally 30 years old, up to 50 years of age. Adult female sturgeon are about 200 kg, the largest may be more than 500 kg.
Dam blocked their hometowns Road sturgeon group
Chinese sturgeon is a migratory fish river. Each year in November, after more than 3000 km of adult sturgeon in the journey, migration to the Yangtze River from the sea to lay their eggs hatch, the larvae by up to 5-6 month long journey into the sea travel and the growth in the sea about 15 years up to maturity, will return to the Yangtze Estuary, set foot on their hometowns Road.
Deputy Director of Yichang, Liu Changchun, said fishery in 1981, Gezhouba closure, blocked the sturgeon's hometown Road, had a combined Yangtze River to the Jinsha Jiang, Ping Shan, 800 km spawning grounds in paragraph 16 all disappeared. However, the strong Chinese sturgeon in the Gezhouba Dam and Yichang? Tingjiang section to find new breeding grounds.
1996? Pavilion Yichang Yangtze River Bridge section of the river in the core area of Chinese sturgeon breeding ground for the construction of the breeding farms will disappear. Chinese sturgeon, leaving only Gezhouba downstream river??? Temple Tsui, the only natural breeding ground. That year, Temple Tsui classified as Hubei Province, "the Yangtze River in Yichang section of the Chinese sturgeon nature reserve."
"Sturgeon breeding sites has increased from 16 800 km section of the river to the only regional compression, the small size of the region, which, once the final destruction of spawning grounds, wild Chinese sturgeon species will not survive in nature. "" Southern Weekend "in the spring of this year wrote a report.
Artificial breeding continued incense
As the migratory route length, susceptible to external damage, the number of Chinese sturgeon has been drastically reduced, and the brink of extinction. Yichang fishery sector, according to incomplete statistics, since 1986, has more than 180 by the end of the adult sturgeon fishing boat propeller injuries suffered and died, there are a number of illegal fishing. Gezhouba closure in 1981, headquarters continued to receive emergency aquaculture expert report: construction of fish passage for sturgeon, or the rare species will be extinct. Since then, the State Council, the National Fisheries Administration decided "to save the fish."
March 1982, the Chinese sturgeon in the Yichang Institute established under the Gezhouba Water Group.
December 1984, researchers for the first time releasing to the Yangtze sturgeon artificial propagation of juvenile 6000. As of 2004, the Three Gorges Project Corporation cumulative investment of more than 3700 million for sturgeon protection and research. "20 years, we have stocked a few hundred 10 thousand artificial sturgeon seedlings, the survival rate of how many there is not statistical." Sturgeon Research Institute, said chief engineer Xiao Hui.
Fully crucial second-generation breeding
"This is the end of the semen quality of male sturgeon poor!" Looking at the sperm microscope imaging maps, Hu Yaping Chinese Sturgeon Research Institute engineers could not help nodding.
Hu Yaping said that the task undertaken by the Institute of Chinese sturgeon has been the proliferation of artificial stocking, according to this design of the Yangtze River each year to the task of releasing 50,000.
Now, the Institute's main task is to capture of the second generation (wild sturgeon second generation) artificial propagation, and this is the largest sturgeon breeding difficulties.
In accordance with international standards, only a sub-generation artificial breeding as broodstock, and then out of the second generation of artificial breeding, artificial only marks the successful rescue of endangered species.
Speaking of generations, the Liu Institute for red lights just like a loving father: "They are nurturing our own hands, as her own children, lest they suffer from hunger, illness, the raising of so many years, they finally grow up!"
