Body weight of common shrews was monitored for five years in free-living animals under mark-recapture technique. In young shrews of their first summer of life, the weight in June was significantly less at the first registration. Body weight of young shrews increased from June to August and dropped to the minimum in November. After wintering, body mass in males jumped following sexual maturation. No other variation in body weight related to sexual activity was found in males. Young females which reproduced in their first summer revealed significant increasing of body mass during reproductive activity. The maximum weight of a pregnant young female was 17.7 g, close to the maximum weight of the pregnant overwintered animal—18.7. The end of gestation in both young and overwintered females is marked by sharp and sustainable diminishing of weight. The weight of lactating young females is greater than that of immature females. When young females were not reproductively active, no signs of former reproductive activity were observed. However, in the years with notable participation of young females in reproduction, body weight of individuals without visible signs of sexual activity was significantly greater. Body weight of pregnant overwintered females was greater than that of females with lactation, and the weight of the latter was greater than that of females without signs of reproductive activity. Body weight of adult females in the trapping sessions when reproduction activity was more intensive was greater. We hypothesized that the effect of the first capture resulted from diminishing of body mass when young began feed on their own; hence, the effect could indicate shrews that just weaned. We propose using body weight as an indicator of reproductive activity in a population of the common shrews studied with mark-recapture technique.

使用标记捕获技术对自由活动动物的普通sh进行了五年的监测。在他们生命的第一个夏天的幼sh中，6月的体重在首次注册时就明显减少了。年轻sh的体重从6月到8月增加，到11月降至最低。越冬后，男性的体重在性成熟后跃升。在男性中未发现与性活动有关的其他体重变化。在第一个夏天繁殖的年轻雌性在生殖活动中显示出体重的显着增加。怀孕的年轻女性的最大体重为17.7 g，接近怀孕的越冬动物的最大体重18.7 g。年轻和越冬雌性的妊娠结束的特征是体重急剧且可持续地降低。哺乳期的年轻雌性的体重大于未成熟雌性的体重。当年轻女性不具有生殖活动能力时，没有观察到以前的生殖活动迹象。但是，在年轻女性显着参与生殖的年份中，没有明显性活动迹象的个体的体重明显更大。怀孕的越冬雌性的体重大于有哺乳期的雌性，后者的体重大于没有生殖活动迹象的雌性。成年雌性在诱捕过程中繁殖活动较重时的体重更大。我们假设第一次捕获的效果是由于年轻人开始自己觅食时体重下降所致。因此，效果可能表明刚断奶的sh。