渤海日本鲟和三疣梭子蟹食性的研究  

DIET OF CHARYBDIS JAPONICA(A. MILINE-DEWARDS) AND PORTUNUS TRITUBERCULATUS(MIERS)IN THE BOHAI SEA

作　　者：姜卫民[1] 孟田湘[1] 陈瑞盛[1] 韦晟[1] 

机构地区：[1]中国水产科学研究院黄海水产研究所,青岛266071

出　　处：《海洋水产研究》1998年第1期53-59,共7页Marine Fisheries Research

基　　金：国家"八五"攻关课题资助

摘　　要：运用出现频率（F％）、尾数百分比（N％）、食物重叠指数（P）以及生境宽度（B）等指标分析了渤海日本和三疣梭子蟹的食性。结果表明，日本和三疣梭子蟹都属于底栖动物食性。主要饵料包括双壳类、底栖甲壳类、鱼类和头足类。日本碍食物生境宽度高于三疣梭子蟹。二者在各季节的食物重叠指数波动在0．39～0．53之间，属于中等重叠水平。摄食率都比较高，多在90％以上。This study analysed the feeding habits of C.japonica and p.trituberculatus using frequency of occurrence(F%), percentage number(N%),index of overlaP(P) and niche breadth(B)etc., based on data collected during the trawl survey of marine living resources covering a large area in the Bobai Sea.The results showed that C.japonica and p.trituberculatus are benthophagic predators whose main preys included Lamellibrancia, benthic crustacea fishes and cephalopoda.The niche breadth of C.japonica was higher than that of p.trituberculatus.The index of diet overlap between the two predator species was in the range of medium overlap(0.39～0.53).The feeding rate of both predator species was found to be high(mostly above 90%).

关 键 词：渤海 日本XUN 三疣梭子蟹 食物组成 重叠指数 

分 类 号：Q959.463[生物学—动物学] Q959.223.5