Chinese Sturgeon is a member
of the Acipenseridae family of Acipenseriformes order, with the Latin
scientific name of Acipenser
sinensis.
As a kind of large-size fresh
water fish, it is 200 to 500 centimeters in body length, and 200 to 500
kilograms in average weight, while the largest one can weigh up to 550
kilograms. Its head is acuminate, with mouth under the jaw. There are
multi-blocks of osteones with barb protrusion in the center of head and a column
of osteones in the ventral middle of the snout end. Its body is covered with
five lines of osteones with acanthoid protuberance. In front of and behind the
anal fin, as well as under and on the base of pectoral fin, there is a piece of
osteone respectively.
Sturgeon is a comparatively
inferior fish species. It is a transitional species of Cartilaginous fish and
bony fish, and is also regarded as a kind of Ganoidei with cartilage.
Having the habit of upstream
migration, it usually dwells along the coasts of China's eastern areas and
migrates into rivers for propagation after sexual maturity. All kinds of aquatic
animals are the food of young sturgeons, and adult sturgeons feed on aquatic
insects, larval, diatom and humic substances. Its reproductive capacity is poor;
generally, it takes more than 10 years for Chinese Sturgeon to be sexually
mature.
Chinese Sturgeon is largely
dispersed over the main streams of Yangtze River and littoral regions of
Qiantang River, Minjiang River and Pearl River. It is a precious fish species
native to China, but now left with a very small quantity. As a kind of
palaeo-species that once lived in the same period when dinosaurs lived. Chinese
Sturgeon has important academic interest in taxonomy and biology. The channel
for adult fish migrating to superior spawning sites such as the Jinsha River in
the upstream of Yangtze River was blocked after the construction of the
hydropower project, Gezhouba Dam. For this reason, the government has invested
huge labor power and financial resources to protect this precious species. At
present, artificial inducement for spawning and stream discharge for incubation
have gained some success.