中文摘要：

目的利用分离和提取的海藻主要成分,作为钉螺食物引诱素在灭螺药物中应用,以提高灭螺药物的杀灭效果。方法提取和分离海藻主要成分,在不同温度、湿度条件下,用不同成分提取物对钉螺进行诱食实验。结果初步确定海藻主要诱螺物质成分为膳食纤维和褐藻糖胶。膳食纤维和褐藻糖胶在25℃时,48h诱螺率分别为79.33%和56.33%,高于15℃和35℃下的诱螺率;湿度在60%环境下,褐藻糖胶、膳食纤维48h诱螺率分别为47.67%和72.33%,高于湿度在30%的环境。结论海藻中膳食纤维成分具有很好的诱螺效果,是一种具有开发利用价值的资源物质。

英文摘要：

Objective To evaluate the attractiveness of main components isolated and extracted from of Laminaria and applied them as the attractive baiting agents in molluscicides to enhance the killing effect of molluscicides. Methods A series of experiments using the attractant extracts of different main components of Laminaria were conducted at different temperatures and humidity conditions. Results The initially identified attractants in Laminaria were dietary fiber and fucoidan. At 25 ℃,the 48 h Oncomelania hupensis-attracting rates of dietary fibers and fucoidan were 79.33% and 56.33%,respectively,higher than those at 15 ℃ and 35 ℃; under 60% relative humidity,the 48 h O. hupensis-attracting rates of fucoidan and dietary fibers were 47.67% and 72.33%,respectively,higher than those under 30% relative humidity. Conclusion The dietary fibers in Laminaria,which had a favorably attracting effect on O. hupensis,were a valuable material worth exploitation and utilization.