报道河蟹对苦草、聚草、金鱼藻、黄丝草的选择性与摄食情况。金鱼藻、黄丝草为河蟹喜食种类 ,选择指数为正值 ,而苦草和聚草的选择指数为负值。在动物性饵料过剩的情况下 ,河蟹仍要摄取少量水草 Report crab on the bitter grass, grass, algae, yellow silk grass selectivity and feeding. Ctenopharyngodon idellus, Xanthium sibiricus for the crab eating species, the selection index is positive, while the selection index of bitter grass and poly grass is negative. In the case of animal feed excess, crabs still have to consume a small amount of aquatic plants