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首页> 外文期刊>Journal of Molluscan Studies >Growth, mortality and fecundity in successive generations of Helix aspersa Muller cultured indoors and crowding effects on fast-, medium- and slow-growing snails of the same clutch
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Growth, mortality and fecundity in successive generations of Helix aspersa Muller cultured indoors and crowding effects on fast-, medium- and slow-growing snails of the same clutch

机译：在室内连续培养的螺旋阿斯佩尔·穆勒（Helix aspersa Muller）的后代的生长，死亡率和繁殖力对同一个离合器的快速，中速和慢速生长的蜗牛产生拥挤效应

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This paper examines the optimum conditions for edible snails Helix aspersa to be cultured indoors successfully in successive generations (originating from the crossing of snails coming from different clutches of a previous generation), and the effect of crowding on growth and reproduction in fast-, medium-, and slow-growing snails coming from the same clutches. The time needed for the snails to reach marketable size (25-32 mm) varied from 2.5 to 5 months until the 7th generation. The time needed for the snails to mature and reproduce from 4 to 7 months until the 5th generation. After the F5 X F5 generation, the final size of the snails decreased. The number of eggs did not differ statistically among the different generations but the reproductive success (how many snails reproduced/cage) increased from F1 = F1 generation onwards to F5 X F5. In F6 X F6 only three (out of 26) snails reproduced and in F7 X F7 none, although the snails remained under controlled conditions for 15 more months. Mortalityin the different generations varied from 0-10% up to F5 X F5 but from F6 X F6 onwards increased and reached 25%. Concerning the origin of snails, it was found that larger snails (originating from Kyparissia, Peloponnesos, Greece) lay statistically moreeggs (138.40 ± 29.60, N=5) than smaller ones (77.38 ± 40.42, N=4) (originating from Hania, island of Crete). Hatching success was also greater.
机译：本文研究了可食用蜗牛连续几代成功在室内培养的最佳条件（源自上一代不同离合器产生的蜗牛的杂交），以及拥挤对速生，中生生长和繁殖的影响-和生长缓慢的蜗牛来自相同的离合器。直到第7代，蜗牛达到上市尺寸（25-32毫米）所需的时间从2.5到5个月不等。蜗牛成熟并繁殖所需的时间为4到7个月，直到第5代。在F5 X F5生成之后，蜗牛的最终大小减小了。卵的数量在不同的世代之间没有统计学差异，但是繁殖成功率（繁殖/笼养多少只蜗牛）从F1 = F1世代增加到F5 X F5。在F6 X F6中，只繁殖了三只（共26只）蜗牛，而在F7 X F7中，没有繁殖出蜗牛，尽管这些蜗牛在受控条件下再呆了15个月。不同年龄段的死亡率从0-10％到F5 X F5不等，但从F6 X F6开始增加，达到25％。关于蜗牛的起源，据统计，较大的蜗牛（起源于希腊的伯罗奔尼撒半岛的Kyparissia）比较小的蜗牛（77.38±40.42，N = 4）产卵（138.40±29.60，N = 5）（起源于哈尼亚，克里特岛）。孵化成功率也更高。

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