Differences in Weight Changes and the Annual Cycle of Male and Female Arctic Ground Squirrels
Differences in Weight Changes and the Annual Cycle of Male and Female Arctic Ground Squirrels
复制标题
雄性和雌性北极地松鼠体重变化和年周期的差异
作者：
I. Mclean;A. Towns
在育空地区海恩斯章克申附近对北极地松鼠（Spermophilus parryii）进行了三个夏季的研究。在整个研究过程中对种群特征和个体动物的行为进行了监测。地松鼠进入冬眠的顺序是成年雌性、雌性幼崽，然后是雄性。雄性比雌性提前从冬眠中苏醒。在条件允许的情况下，雄性在秋季储存食物，而雌性则不储存。雄性从冬眠中苏醒时，冬季体重的减少明显少于雌性。雄性在交配期体重下降，而雌性则不会。这些数据是根据交配期来解释的，雄性的交配期大约持续三周，而雌性的交配期则不到一天。关键词：地松鼠，雄性/雌性差异，体重，年周期
Arctic ground squirrels ( Spermophilus parryii ) were studied for three summers near Haines Junction, Yukon Territory. Population characteristics and the behaviour of individual animals were monitored throughout the study. Ground squirrels entered hibernation in the order adult females, juvenile females, then males. Males emerged from hibernation before females. Males stored food in the autumn when conditions permitted, whereas females did not. Males emerged from hibernation having lost significantly less weight than females over winter. Males lost weight during the mating period, whereas females did not. These data are interpreted in terms of the mating period which for males lasts for approximately three weeks, whereas for females it lasts for less than a day. Key words: Ground squirrels, male/female differences, weights, annual cycle