珠江斑鳠的食性  

Feeding habits of Mystus guttatus in the Pearl River

作　　者：胡隐昌[1] 陈焜慈[1] 李恒颂[1] 邓国成[1] 邬国民[1] 李大疆[1] 

机构地区：[1]中国水产科学研究院珠江水产研究所

出　　处：《水产学报》2003年第4期301-306,共6页Journal of Fisheries of China

基　　金："九五"国家攻关资助项目(96-008-01-08)

摘　　要：根据对珠江斑鳠的资源调查结果,从饵料生物种类组成、出现频率、不同体长斑鳠的食物组成差异、食性的季节变化等方面研究了珠江斑鳠食性特点。表明天然水域中斑鳠主要以甲壳类、昆虫类、鱼类、环节动物、植物碎屑等为食,其中甲壳类的出现频率高达78.6%,水生昆虫的出现频率为45.8%。其食物类群的季节变化明显,但没有出现停止摄食的时期,斑鳠在春季的摄食强度最大,各类食物在春季出现的频率均高于其它季节,斑鳠摄食率和充塞度的季节变化是一致的。不同体长斑鳠的饵料有一定的转化或更替阶段,约170mm体长时为主要饵料转化的第一阶段,约240mm体长时为主要饵料转化的第二阶段,随着斑鳠体长的增长,其摄食饵料的个体变大,但种类减少。This paper reports the feeding habits of Mystus guttatus in the Pearl River with natural resources investigation. The reports include feed fullness, feed composition, frequency of feed occurrence and variation of feed composition in different seasons was also studied. The investigation result shows that the feed of Mystus guttatus in the Pearl River are crustaceans, insect, annelida, fish and pieces of plant. Among them, the crustaceans and insects are the main feed,the emergence frequency is 78.6% and 45.8% respectively. In different seasons, the variety of feed composition is markedly different, and no pause of feeding. The feed of Mystus guttatus changed with the different body length of the fish. The first feed change period was at about 170mm body length and the second at about 240mm body length. It is getting simpler as Mystus guttatus grows up.

关 键 词：珠江斑鱯 食性 饵料 生物种类 出现频率 季节变化 摄食强度 充塞度 

分 类 号：S965.1[农业科学—水产养殖]