摘要
本文系1985～1986年长江口渔业资源调查中两种占优势的蟹的食性生态研究结果。长江口海区三疣梭子蟹和细点圆趾蟹,存在着昼夜和季节摄食强度的差异。文章还讨论了两种蟹的摄食竞争,但又共存于同一海区的生态学问题。
Portunus trituberculatus and Ovalipes punctatus are the major dominant co-existing crabs in the estuary and the adjacent sea waters of the Changjiang River. The gastric contents of the two crabs, which were catched during the monthly fishing survey from September 1985 to August 1986, were analysed. The results from 750 P. trituberculatus and 268 O. punctatus showed that the two species are carnivores. The remains of fishes, molluscs, shrimps and echinoderms were to a different extent found from the gastric samples. Their feeding activities are changeable. P. trituberculatus had more variant feeding activities with seasonal changes, while O. punctatus had more variances of feeding activities with diurnal time change. Little differences in feeding between the male and the female in both crabs were determined. The relationship of feeding function and morphological structure were noticed. On basis of ecological theory, the reason why the two carnivore crabs could) coexist in the same area with limited supplies of food resources was discussed.
出处
《海洋科学》
CAS
CSCD
北大核心
1991年第5期60-64,共5页
Marine Sciences
关键词
长江口
蟹
三疣梭子蟹
趾蟹
生态学
Portunus trituberculatus, Ovalipes punctatus, Feeding ecology
