摘要
用 4种指标分析了梁子湖麦穗鱼的食性。结果表明 ,藻类的出现率 (97.0 6 % )、个体数百分比 (99.91% )和相对重要性指数 (0 .98)均最大 ,而底栖动物的重量百分比 (98.5 3% )最大 ,表明麦穗鱼以底栖动物为主要食物 ,同时摄食大量的藻类。该鱼常年摄食 ,且摄食强度表现出一定的季节性变化 ,1～ 3、9月的摄食强度较高 ,而 7月较低 ,可能是由于被动性采样所致。
By 4 kinds of index to analyze the food habits of Pseudorasbora parva in Liangzi Lake, the result indicated that the value of occurrence (97.06%), number (99.91%) and the index of relative importance (IRI=0.98) of the Phytoplankton was the highest, and weight (98.53%) of zoo-benthoswas the highest. It meant that Pseudorasbora parva mainly feed on the zoo-benthos. In addition, the feeding intensity of the fish changed with season, which was higher in January, March and September, and lower in July when the data may be underestimated on account of passive sampling of fish.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2004年第3期331-334,共4页
Journal of Huazhong Agricultural University
基金
国家"九五"攻关项目 (96 0 0 8 0 2 0 3 )资助
关键词
麦穗鱼
食性
摄食强度
梁子湖
Pseudorasbora parva
food habits
feeding intensity
Liangzi Lake
