This paper reviews five of the eight species of acipenseriforms that occur in China, chiefly those of the Amur and Yangtze rivers. Both species still support fisheries, but stocks are declining due to overfishing. Acipenseriformes of the Yangtze River are primarily threatened by hydroelectric dams that block free passage to spawning and feeding areas. The Chinese paddlefish Psephurus gladius now is rare in the Yangtze River system, and its spawning activities were severely limited by completion of the Gezhouba Dam in Since , only 3—10 adult paddlefishes per year have been found below the dam.
Limited spawning still exists above the dam, but when the new Three Gorges Dam is complete, it will further threaten the paddlefish. Artificial propagation appears to be the only hope for preventing extinction of P. Dabry's sturgeon A. It is concentrated today in reaches of the main stream above Gezhouba Dam. The fishery has been closed since , but populations continue to decline. Acipenser dabryanus has been cultured since the s, and holds promise for commercial aquaculture; availability of aquacultural methods offers hope for enhancing natural populations.
The Chinese sturgeon A. There is still disagreement about the taxonomy of the Pearl and Yangtze River populations. The Yangtze River population is anadromous. Adults begin spawning at about age 14 years males and 21 years females , and adults spend over 15 months in the river for reproduction. Spawning sites of A. Since , commercial fishing has been prohibited but more measures need to be taken such as establishing protected areas and characterizing critical spawning, summering and wintering habitats.
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This is a preview of subscription content, log in to check access. Rent this article via DeepDyve. The biology of the sturgeon in Yangtze and their artificial propagation. Bemis, W. Early development of the actinopterygian head. External development and staging of the paddlefish Polyodon spathula. Google Scholar. An overview of Acipenseriformes.
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Buckley, J. Habitat use and behavior of prespawning and spawning shortnose sturgeon, Acipenser brevirostrum , in the Connecticut River. Doroshov ed. Junk Publishers, Dordrecht. Chen, S. A study of the artificial propagation of Acipenser schrencki. Heilongjiang Fisheries 4: 8—12 in Chinese. Deng, X. Williot ed. Deng, Z. Analysis on Acipenser sinensis spawning ground and spawning scales below Gezhouba Hydroelectric Dam by the means of examining the digestive contents of benthic fishes.
Folz, D. Management of the lake sturgeon, Acipenser fulvescens , population in the Lake Winnebago system, Wisconsin. Fu, Z. The artificial propagation of Acipenser sinensis Gray below Gezhouba Dam. Freshwater Fisheries 1: 1—5 in Chinese. Galbreath, J. Status, life history, and management of Columbia River white sturgeon, Acipenser transmontanus.
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