内陆水库放养西伯利亚鲟的食物组成及与底栖动物资源的关系

Diet composition of juvenile Siberian sturgeons(Acipenser baeri) cultured in inland reservoir in western China and its' relations with benthic organism resources

为了解西部内陆水库放牧式养殖西伯利亚鲟的生产潜力,以甘肃省酒泉市的红砂墩水库为例,调查了水库中底栖动物的资源以及西伯利亚鲟的食物组成和季度摄食量。结果显示:水库中底栖动物12种,其中,腹足类3种,寡毛类3种,水生昆虫3种,甲壳类2种。2龄西伯利亚鲟的食物组成包括调查所得的全部底栖生物,以甲壳类、腹足类、寡毛类和昆虫幼虫为主要食物,随着鲟鱼的生长,秋冬季后开始逐渐摄食小型底栖鱼类。研究表明2龄西伯利亚鲟食谱范围较广,适合在此类水库中养殖。另对底栖动物的鱼产潜力进行估算,该水库底栖动物每年提供给鲟鱼生长的鱼产潜力为18.55 t。

The benthic organism resources in inland reservoir（Hongshadung reservoir,Jiuquan,Gansu province） in western China were investigated.12 benthic species were indentified preliminarily,of which 3 species belonged to gastropoda,3 species oligochaeta,4 species aquatic insect,1 species crustacean and 1 species amphipoda.Potential fishery productivity was 18.55 t.Diet composition and feeding habits of juvenile Siberian sturgeons（Acipenser baeri） cultured in reservoir was studied.2-year old Siberian sturgeons mainly ingested crustacean,amphipoda,oligochaeta and chironomidae larvae in spring and summer.In autumn,Siberian sturgeons began to feed on small fish.The food item of juvenile Siberian sturgeons included all benthic organisms in the reservoir,which indicated that Siberian sturgeons had a wide range of food choice.Thus we drew the condusion that Siberian sturgeons was suitable species for culturing in this type of reservoirs.