瓣结鱼食性的研究  

Studies on Feeding habits of Tor(Foliter) brevifilis brevifilis

作　　者：代应贵[1] 陈毅峰[2] 王晓辉[1] 

机构地区：[1]贵州大学动物科学学院,贵阳550025 [2]中国科学院水生生物研究所,武汉430072

出　　处：《淡水渔业》2007年第5期14-18,共5页Freshwater Fisheries

基　　金：贵州省科技攻关项目(黔科合2004NGY008);贵州省科技基金项目[黔科合(2004)3027];贵州省省长基金项目[黔省专合字(2005)347]资助

摘　　要：以采自贵州境内清水江、都柳江的318尾瓣结鱼(Tor(Foliter)brevifilis brevifilis)为研究对象,从食物组成、摄食强度和摄食形态学等方面研究了瓣结鱼食性的特点。结果表明:瓣结鱼的食物由双翅目昆虫幼虫等17类饵料生物组成,并以双翅目昆虫幼虫的出现率最高。瓣结鱼的充塞度按春、夏、秋、冬季逐渐增高,季节性变化明显。充塞指数随体长生长显著减少,而摄食率则随体长生长逐渐增加。充塞指数和摄食率均以V期性腺个体为最低。瓣结鱼为底层杂食性鱼类。The feeding habits of Tor（Foliter） brevifilis brevifilis were studied by analyzing feed composition, feeding intensity and feeding morphology on the basis of 318 specimen of the species collected from the Qingshui River and the Duliu River in Guizhou, China. The results showed that the feed was comprised of 17 categories of animal or plant species. Diptera larva had the highest occurrence rate. The feed fullness of Tor（Foliter） brevifilis brevifilis increased significantly from spring to winter within a year. The fullness index of the species decreased obviously while the feeding rate increased gradually during its growth of standard length. Both the fullness index and feeding rate of the individuals at V phase of sex gland were lower than at other phases. Tor（Foliter） brevifilis brevifilis is omnivorous at the bottom of freshwater rivers according to its feed composition and feeding morphology.

关 键 词：瓣结鱼(Tor(Foliter) brevifilis brevifilis) 食性 充塞指数 摄食率 摄食形态学 

分 类 号：Q175[生物学—水生生物学]