Zotin A A
Izv Akad Nauk Ser Biol. 2009 Nov-Dec(6):695-702.
Our investigation on the growth of 14 individuals of the great pond snail Lymnaea stagnalis was performed in an aquatic culture at 18 degrees C beginning from the 10th week after hatching until death. It has been demonstrated that the increase in the mollusk mass follows an S-like curve during the whole studied period. Linear growth (conch height) follows a parabolic (convex) curve until the age of 39 weeks. Both weight and linear growth during studied period significantly approximate to the Bertalanffy equation, while the interrelation between mass and conch height corresponds to the allometric equation. The meanings of the coefficients of these equations do not differ significantly in different individuals. At the age of 38 to 39 weeks, all mollusks demonstrate breakage in the curve of linear growth, then followed with abrupt slowing of growth until stopping or even decreasing in size in some cases. Neither the Bertalanffy equation nor the allometric relation describe the linear growth of individuals with ages exceeding 39 weeks.
我们对14只大蜗牛（Lymnaea stagnalis）的生长情况进行了研究，在水温18摄氏度的水族箱中培养，从孵化后第10周开始，直至死亡。结果表明，在整个研究期间，软体动物的质量增长呈S形曲线。线性生长（贝壳高度）在39周龄之前呈抛物线（凸形）曲线。在研究期间，体重和线性生长均显著符合贝塔朗菲方程，而质量与贝壳高度之间的相互关系符合异速生长方程。这些方程系数的含义在不同个体之间没有显著差异。在38至39周龄时，所有软体动物的线性生长曲线均出现断裂，随后生长突然放缓，在某些情况下甚至停止生长或体型减小。贝塔朗菲方程和异速生长关系均无法描述年龄超过39周的个体的线性生长情况。
