水生态学杂志

2010年4月14日至6月1日在湖北宜昌进行了匙吻鲟苗种的规模化培育试验示范。鱼苗培育在室内水槽内进行,放养密度800～1000尾/m2,改善水温、溶氧、流速等养殖条件,适时投喂适口饵料生物,经过15d养殖,获4cm左右的鱼种47.12万尾,成活率95%;鱼种培育在水库坝下池塘进行,放养密度30万～40万尾/hm2,以水温相对稳定、水质优良的水库为养殖水源,及时驯食,转食后日投喂鱼种体重3%～5%的浮性鲟鱼饲料,加强饲养管理,经过30d养殖,获10～12cm鱼种40.47万尾,成活率85.9%。

The demonstration for large-scale rearing of Paddlefish(Polyodon spathula)fry and fingerling were carried out in Yichang,Hubei province during April to June 2010.Suitable conditions(water temperature,dissolved oxygen,flow rate,etc.)and the palatable prey organisms were provided for fry cultivation in the indoor tank.After 15 days' rearing,471 200 fry of 4 cm in total length were harvested and the survival rate reached 95%.The cultivation of fingerlings was carried out in ponds with relatively stable water temperature and good water quality downstream of the Shanxichong Reservoir.The rational stocking density was controlled in 300 000-400 000 ind./hm2,and the fingerlings were daily fed with floating feed at 3%-5% of fish body weight.After 30-day culture under the enhanced management,404 700 fingerlings of 10-12 cm in total length were obtained and the survival rate reached 85.9%.