Wynne-Edwards K E, Lisk R D
Biology Department, Princeton University.
J Comp Psychol. 1987 Dec;101(4):335-44.
Recent studies in our laboratory have suggested that monogamy may be the preferred mating system in the Djungarian hamster (Phodopus campbelli), whereas the available evidence for the closely related Siberian hamster (P. sungorus) does not show the same pattern. Here we examine the behavior of male-female dyads of both species interacting during 1-hr tests in large, familiar habitats containing defensible nest boxes, food, and water. Levels of aggression within pairs were low, compared with those seen during brief intrasexual encounters, whereas affiliative behaviors, such as sniffs, were high. P. campbelli scent marked more than twice as frequently as P. sungorus. Females of both species scent marked at a constant rate irrespective of their location in the habitat, whereas males scent marked at a higher rate in the female's home area. Two major features of the copulatory pattern differed between the two species: (a) The duration of the ejaculatory lock was five times longer in P. sungorus than in P. campbelli. (b) Both species had approximately the same number of mounts in each ejaculatory series, but the intromission/mount ratio was significantly higher in P. sungorus.
我们实验室最近的研究表明，一夫一妻制可能是黑线毛足鼠（Phodopus campbelli）偏好的交配系统，而对于近缘物种西伯利亚仓鼠（P. sungorus），现有证据并未显示出相同的模式。在此，我们研究了这两个物种的雌雄配对在大型、熟悉的栖息地中进行1小时测试时的行为，栖息地中有可防御的巢箱、食物和水。与短暂的同性相遇相比，配对中的攻击水平较低，而诸如嗅闻等亲和行为则较高。黑线毛足鼠的气味标记频率是西伯利亚仓鼠的两倍多。两个物种的雌性无论在栖息地中的位置如何，气味标记频率都保持恒定，而雄性在雌性的领地内气味标记频率更高。两个物种的交配模式有两个主要特征不同：（a）射精锁定的持续时间在西伯利亚仓鼠中比在黑线毛足鼠中长五倍。（b）两个物种在每个射精系列中的骑跨次数大致相同，但插入/骑跨比率在西伯利亚仓鼠中显著更高。
