拉萨裸裂尻鱼的食性  

Feeding habits of Schizopygopsis younghusbandi younghusbandi

作　　者：杨学峰[1] 谢从新[1] 马宝珊[1] 霍斌[1] 黄海平[1] 张惠娟[1] 许静[1] 

机构地区：[1]华中农业大学水产学院,武汉430070

出　　处：《淡水渔业》2011年第4期40-44,49,共6页Freshwater Fisheries

摘　　要：分析了2008年8月至2009年9月在雅鲁藏布江逐季采集的149尾拉萨裸裂尻鱼(Schizopygopsis younghus-bandiyounghusbandi)肠道内含物,对其食性和食物选择性进行了研究。结果表明,拉萨裸裂尻鱼的摄食方式为刮食型,属于杂食性鱼类。全年摄食,但繁殖期间的亲鱼停止摄食。食物组成依照相对重要性(IRI%)依次为藻类和大型无脊椎动物,其次是水生植物,小型无脊椎动物和虫卵。使用Schoener重叠指数比较显示其在各季节之间、各不同体长组之间的食物组成有显著性的重叠(D>0.6)。Gut contents of 149 Schizopygopsis younghusbandi younghusbandi in the Yarlung Zangbo River from August 2008 to September 2009 were collected,and the feeding habits and selectivity were analyzed.The results showed that this species was an omnivorous fish,using scrape way for feeding.The fish feeded all the year,but would stop feeding when breeding.According to the index of relative importance（IRI%）,their diet composition included algae,macroinvertebrates,hydrophytes,small invertebrates and eggs.The Schoener overlap index was used to compare diets by fish size and seasons respectively,and the result showed there was significant dietary overlap（D0.6）.

关 键 词：拉萨裸裂尻鱼(Schizopygopsis younghusbandi younghusbandi) 食性 体长 

分 类 号：S917.4[农业科学—水产科学] Q958.1[生物学—动物学]