不同地区福寿螺繁殖力比较

应用单对交配的方法对江苏、福建和广东3个不同地理群体福寿螺的繁殖力进行比较.结果显示,福寿螺的繁殖力变异较大;在个体产卵量方面,福建螺与江苏螺有显著差异(P<0.05);在雌螺个体体重的相对产卵量方面,广东螺与福建螺、广东螺与江苏螺有显著差异(P<0.05);不同地区、不同交配个体产卵块数差异不显著(P＞0.05);不同壳色的福寿螺繁殖力差异不明显(P＞0.05);交配个体雌雄大小不同其交配产卵量与雌螺个体大小呈正相关,与雄螺个体大小无关;雌螺个体越大产卵量越大,但相对产卵量反而越小;雌螺产卵量与卵块数呈正相关.福寿螺的繁殖力与环境条件、食物种类、温度等因素有密切的关系.

Comparative Study On Fecundity of Different Geographic Populations of Pomacea canaliculata

In this study,comparative study on fecundity of Pomacea canaliculata from Zhangzhou (Fujian),Zhuhai (Guangdong) and Suzhou (Jiangsu) was conducted by using the method of single-pair mating.The results indicated that there was difference to fecundity of different geographic populations,and the difference was significant between Fujian and Jiangsu in individual fecundity,and the difference was also significant between Guangdong and Jiangsu, Guangdong and Fujian in relative fecundity of female.Fecundity has insignificant difference for different shell-color populations of the snails.The spawning nunlber was independent on individual size of the male and was positively related with individual size of the female.The snails'fecundity had close relationship with the factor,including environmental condition,foods and temperature and so on.