Abstract

Age-related variations in the hippocampus mass in the late postnatal ontogeny of bank voles (Clethrionomys glareolus) from the spring and autumn generations are considered in a comparative aspect. The mass of the hippocampus of the spring voles increases regularly over their short life cycle and approaches the values maximum for the species at two months of age. In the autumn voles, a two-peak growth curve is detected, the hippocampus increasing until September, after which an autumn-winter regression of the mass of this brain region was observed. The hippocampal growth of autumn voles resumed at the age of 7–9 months and coincided with the beginning of the period of reproduction. The hippocampus of autumn voles reached a definitive size at the age of 10–11 months. The results obtained characterize specific features of hippocampal growth in spring and autumn voles. The mechanisms that switch the alternative types of ontogeny of the seasonal generations are discussed.

中文翻译：

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不同季节世代的田鼠田鼠（Clethrionomys glareolus，Rodentia）海马的生长

摘要

银行田鼠出生后后期个体发育过程中海马体质量的年龄相关变化（斜纹夜蛾（Clethrionomys glareolus）在比较方面考虑了春季和秋季各代的）。春季田鼠的海马质量在其短生命周期内有规律地增加，并在两个月大时接近该物种的最大值。在秋天的田鼠中，检测到两条峰的生长曲线，海马增加直到9月，此后观察到该大脑区域质量的秋冬回归。秋季田鼠的海马生长在7–9个月大时恢复，并与繁殖期开始相吻合。秋季田鼠的海马体在10-11个月大时达到确定的大小。获得的结果表征了春季和秋季田鼠的海马生长的特定特征。