用饵料生物的生态类群的出现频率百分比组成来划分东、黄海6种鳗的生态属性和食性类型.通过对其食物组成的分析,发现这6种鳗的生态属性均为底层鱼类且分属3种食性类型:前肛鳗、黑尾吻鳗和银色突吻鳗属底栖生物食性;星康吉鳗和食蟹豆齿鳗属底栖生物和游泳动物食性;奇鳗属游泳动物食性.结果还表明:前肛鳗、星康吉鳗和黑尾吻鳗之间不存在食物竞争.同时建议在食性分析中使用食物的能量百分比这一指标,但需要进一步的收集基础数据.

The food item were identified using percentage f requency of occurrence. By analysis of food composition, 6 species of eels in East China Sea and Yellow Sea are bottom fishes and belong to 3 types of food habit: Dysomma anguillaris, Rhynchocymba ectenura and Rhynchocymba nystromi are benthophagous fishes; Astroconger myriaste and Pisoodonophis cancrivorus are benthophagous-nektivorous f ishes; Alloconger anagoides is nektivorous f ish. The result s suggested that there is not food competition between Dysomma anguillaris, Rhynchocymba ectenura and Astroconger myriaste. It is suggested that percentage of energetic composition of diets be employed to analyze feeding habits. However, further collection of basic data is required.

国家重点基础研究发展计划(973计划)