湖北钉螺交配行为的信息素传递研究

设置不同环境(裸盘、泥盘、水盘)、不同媒介(水、空气)及流动方向,分析在不同条件下湖北钉螺的觅偶、追踪、趋近、交配过程中行为活动及其影响因素,并据此探讨信息素的产生及在繁殖中的作用.实验结果表明,钉螺的觅偶、追踪、趋近行为以♂为主动,♂跟踪趋近♀与距离远近有关,越近交配成功率越高;♀爬行途径吸引♂,相反则不能;钉螺交配成功率表现为裸盘<泥盘<水盘.空气和水在♂和♀间的流向明显影响钉螺交配成功率,且水流方向影响更为显著,如,气流由♀流向♂时,水盘中由30%提高到50%,泥盘中由30%提高到40%;水流由♀流向♂时,交配成功率在水盘中由30%提高到70%,泥盘中由30%提高到80%.表明钉螺交配识别可能与信息素有关,♀螺可发放信息,♂螺可接收信息;♀螺信息素主要经水扩散和爬行轨迹留存.

Study on pheromone delivering in Oncomelania hupensis mating

Abstract：Three habitations（3 discs with blank, mud and water, respectively） and 2 media（air and water） with different flowing direction were performed in the experiment. The reproduction behaviors of the sail Oncornelania hupensis including searching, following, pairing and mating and factors which effected on their reproducion actions were analyzed, and the generation of pheromones and its effect on O. hupensis＇ activity during mating were also analyzed. The results showed that the male raked the initiative of searching, following and pairing. The success rate of the mating declined when the distance increased. The crawling path of the female could attract male, but the male＇s path could＇t attract the female. The success rate of the sail mating depended on habitation： blank disc〈disc with mud 〈 disc with water. When air and water flowed from the male to the female, the mating was non- significantly effected. On the contrary, their effects were significant, especially in water. For example, when air flowed from the female to the male, the mating percentage increased from 30% to 50% in disc with water, to 400% in disc with mud; when water flowed from the female to the male, the mating percentage increased from 30% to 70% in disc with water, to 80% in disc with mud. These results indicated that the female could deliver pheromones and the male could receive pheromones. The female＇s pheromones were mainly spread through water and crawling path.