Abstract— Animal populations living at the periphery of species range are characterized by increased natural mortality, which affects the pattern of population dynamics and reproductive potential of individuals. However, trends of variation in reproductive parameters along ecological gradients are as yet unclear. Analysis of age at maturity, timing of pregnancy, and rates of postnatal development in reproductive pairs of northern mole voles ( Ellobius talpinus ) kept under laboratory conditions has shown that the test parameters in a population living at the northeastern periphery of the species range (Novosibirsk oblast) are different from those in a population from the optimal zone of the range.

中文翻译：

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物种分布区东北缘北鼹鼠的繁殖特征

摘要：生活在物种分布边缘的动物种群的特点是自然死亡率增加，这会影响种群动态格局和个体的繁殖潜力。然而，生殖参数沿生态梯度的变化趋势尚不清楚。对在实验室条件下饲养的北鼹鼠 (Ellobius talpinus) 繁殖对的成熟年龄、怀孕时间和出生后发育率的分析表明，生活在该物种分布区东北边缘（新西伯利亚）的种群的测试参数oblast) 与来自该范围最佳区域的种群中的那些不同。