胎儿的子宫位置会影响成年雄性沙鼠的交配和气味标记行为。

Fetal uterine position affects copulation and scent marking by adult male gerbils.

作者信息

Clark M M, Malenfant S A, Winter D A, Galef B G

机构信息

Department of Psychology, McMaster University, Hamilton, Ontario, Canada.

出版信息

Physiol Behav. 1990 Feb;47(2):301-5. doi: 10.1016/0031-9384(90)90146-u.

DOI:10.1016/0031-9384(90)90146-u

PMID:2333346

Abstract

Those male Mongolian gerbils (Meriones unguiculatus) that as fetuses resided in uterine locations adjacent to no females, when adult, scent marked more frequently, mounted estrous females with shorter latencies, and ejaculated after fewer intromissions than did those male gerbils that as fetuses resided in uterine locations adjacent to two females. Both the scent-marking frequencies and copulatory patterns of adult males were positively correlated with three indices of their circulating levels of testosterone: ventral gland size, anogenital distance, and relative testes weights. Also, those males that scent marked relatively frequently copulated more reliably than did those males that scent marked relatively infrequently.

摘要

那些在胎儿期时子宫位置附近没有雌性的雄性长爪沙鼠（Meriones unguiculatus），成年后标记领地的频率更高，对处于发情期的雌性交配时潜伏期更短，且插入次数较少后就能射精，而那些在胎儿期时子宫位置附近有两只雌性的雄性长爪沙鼠则不然。成年雄性的领地标记频率和交配模式都与它们循环睾酮水平的三个指标呈正相关：腹腺大小、肛门与生殖器间的距离以及相对睾丸重量。此外，那些领地标记相对频繁的雄性比领地标记相对不频繁的雄性交配更稳定。