Selectivity of Chinese mitten-handed crab for major weeds in the northern paddy fields
Lü Dong-feng1,WANG Wu1,MA Xu-zhou1,CHEN Zai-zhong1, BAI Guo-fu2,CHEN Wei-xin3,YU Yong-qing3
1.College of Fisheries and Life,Shanghai Ocean University,Shanghai 201306,China;2.Fishery Science Research Institute of Panjin city, Liaoning Province,Panjin 124000,China;3.Crab Technology Institute of Panshan County,Panjin 124000,China
Abstract: The selection and feeding of weeds and rice were studied in Chinese mitten-handed crab(Eriocheir sinensis)with different body weights of 1-10,11-20,21-30 and≥30 g cultured in net cages disposed in a paddy field.It was found that the crab showed significantly feeding selection of the weeds,the maximal food consumption for wild arrowhead,followed by for Potamogeton and Monochoria grass and the minimal for barnyard grass and rice. The crabs with different sizes were found to have different consumption of the weeds.The crab weighing 20-30 g had the maximal food consumption of the wild arrowhead,significantly different from the others(P＜0.01).The crab over 30 g showed the minimal food consumption of Monochoria vaginalis,and Echinochloa crusgalli(P＜0.05).The crab weighing 1-10 g had the maximal food consumption of the barnyard grass and rice,significantly different from the others(P＜0.01).
吕东锋, 王武, 马旭洲, 陈再忠, 白国福, 陈卫新, 于永清. 河蟹对北方稻田主要杂草选择性的初步研究[J]. 大连海洋大学学报, 2011, 26(2): 188-192.
Lü Dong-feng, WANG Wu, MA Xu-zhou, CHEN Zai-zhong, BAI Guo-fu, CHEN Wei-xin, YU Yong-qing. Selectivity of Chinese mitten-handed crab for major weeds in the northern paddy fields. Journal of Dalian Ocean University, 2011, 26(2): 188-192.
2011, Vol. 26 
