中华鲟的移地养殖

A. sinensis is listed as the first class protected anim als of the state dis- tributing m ainly in continentalw atersofthe EastChina sea、the Yellow Sea and m ain currentof the Changjiang River, occasionally found in som e opening lakes and tributaries of the large rivers. Itbelongs to anadrom ous fish m igrating betw een sea and rivers, spaw ning in fresh w a- ters .The num ber of this anim al has been decreased.The ex-situ culture of A. sinensis in Pution, southern Fujian w as reported in the present paper. The fertilized eggs sent from Changjiang Fisheries Institute had been hatched in round cem ent ponds at 21.5 ℃,pH6.5, DO6m g/Lfor 72h in Putian Base. The yolk sac larva lived for10 days w ithoutbaitand began to feed on Lim nodrilus hoffm eisterifor 46 days. Eight weeks after hatching, juvenile fed on both L. hoffm eister and artificialdiet, and totally consum ed the form ula feed in 15 days. The survival rate of these larvae w as 26% from the feeding day (1997-11-02) to the 19th m onth (1999-07). Sturgeon in Putiaon Base grow quickly for the suitable conditions in this study. The m ean body w eight w as 3.9 kg and the length 100 cm in one year, and reached 14 kg (116cm ) after 19 m onths culturing.