我们于1982年8月在南京市八卦洲至安徽省当涂县江心洲之间的江域内,用固定在长竹杆上的尼龙网兜,打捞水中漂浮物及有螺滩附近水下淤泥,检查有无钉螺;在当涂县江心洲尾作漂浮物上钉螺吸附力和其扩散距离的观察。在距上游有螺滩10～20公里的主航道中,共捞得漂浮物194斤,吸附有钉螺67只,其中幼螺57只,占 We in August 1982 in Nanjing City, Gouzhou Island to Dangtu County, Anhui Jiang Xin Chau between the river, with a fixed nylon pole net in the bamboo poles, salvage floating debris and underwater beach near the screw beach, check there Non-snail; Dangtu County, Jiangxi Xin Chau floating debris on the adsorption force and its diffusion distance observation. A total of 194 kilos of floating debris were collected from the main channel 10 to 20 km away from Lojikang, with 67 snails adhering to them, of which 57 were young snails, accounting for