摘要
研究了在稻田中用网箱养殖的不同规格的中华绒螯蟹Eriocheir sinensis对稻田中4种杂草和水稻的选择性及摄食情况。结果表明：中华绒螯蟹对稻田杂草的摄食存在明显的选择性,对野慈姑Sagittaria trifoliavar.sinensis的摄食量最大,对鸭舌草Monochoria vaginalis和眼子菜Potamogeton franchetii的摄食量相对较少,对稗草Echinochloa crusgalli和水稻的摄食量最差。不同规格的中华绒螯蟹对杂草的摄食率有所不同,20-30 g的中华绒螯蟹对野慈姑的摄食率最高,与其它3种规格的中华绒螯蟹间存在极显著差异（P〈0.01）;30 g以上的中华绒螯蟹对鸭舌草和眼子菜的摄食率均最低,与其它规格的中华绒螯蟹间存在显著差异（P〈0.05）;1-10 g的中华绒螯蟹对稗草和水稻的摄食率最高,与其它规格的中华绒螯蟹间存在极显著差异（P〈0.01）。
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（P0.01）.The crab over 30 g showed the minimal food consumption of Monochoria vaginalis,and Echinochloa crusgalli（P0.05）.The crab weighing 1-10 g had the maximal food consumption of the barnyard grass and rice,significantly different from the others（P0.01）.
出处
《大连海洋大学学报》
CAS
CSCD
北大核心
2011年第2期188-192,共5页
Journal of Dalian Ocean University
基金
农业部优质蟹种规模化繁育与养殖示范项目(nyhyzx07-045)
上海市重点学科建设项目(Y1101)
关键词
中华绒螯蟹
稻田
杂草
水稻
摄食率
选择性
Eriocheir sinensis
paddy field
weed
rice
feeding rate
selectivity
