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首页> 外文期刊>Belgian Journal of Zoology >Does reproduction accelerate the growth of eye lens mass in female voles ?
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Does reproduction accelerate the growth of eye lens mass in female voles ?

机译：繁殖是否会加速雌田鼠的晶状体质量增长？

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摘要

Although the eye lens mass method has long been used for determining age in small rodents from natural populations, the effects of breeding on growth rates of lenses are rarely considered. Under laboratory conditions, we examined eye lens mass in two groups of 100- day old females of the common vole (Microtus arvalis) : one comprising the females that have already bred, each delivering two litters, and another comprising controls that did not reproduce. The breeding females were heavier than the nonbreeding ones and also had heavier dried eye lenses. However, the effect of breeding on eye lens mass disappeared when the variation in body mass was accounted for in the statistical model. The total number and mass of offspring that the females produced did not affect the lens mass. We conclude that different reproductive histories did affect the growth of eye lens in female common voles through its influence on body size. These results suggest that besides age, the construction of calibration curves for aging voles in natural populations should also include individual body mass as an additional covariate to account for variation in body mass due to differences in reproductive condition.
机译：尽管长期以来一直使用眼透镜质量法来确定自然种群中小型啮齿动物的年龄，但很少考虑繁殖对晶状体生长速率的影响。在实验室条件下，我们检查了两组100天大的普通田鼠（田鼠（Microtus arvalis））的晶状体质量：一组包括已繁殖的雌性，每组产两个窝，另一组包含未繁殖的对照。繁殖雌性比非繁殖雌性重，并且干眼镜片也重。但是，在统计模型中考虑了体重变化后，繁殖对眼晶状体质量的影响就消失了。雌性产生的后代的总数和质量不影响晶状体的质量。我们得出的结论是，不同的生殖史确实通过影响体形影响雌性田鼠的晶状体生长。这些结果表明，除年龄外，自然种群中衰老田鼠的校准曲线的构建还应包括个体体重作为附加协变量，以说明由于生殖条件差异而引起的体重变化。

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