Clark M M, Galef B G
Department of Psychology, McMaster University, Hamilton, Ontario, Canada.
J Comp Psychol. 1999 Dec;113(4):388-95. doi: 10.1037/0735-7036.113.4.388.
Effects of testosterone (T) on parental behavior of male Mongolian gerbils (Meriones unguiculatus) were examined. After undergoing gonadectomy, castrated males were implanted with empty capsules or capsules containing T; sham-operated males were implanted with empty Silastic capsules. Subsequently, each male was paired with a pregnant female, and after delivery, families were observed 15 min/day for 20 days. Gonadectomized males without T spent more time in contact with, huddling over, and licking pups than did either sham-operated males or gonadectomized males with T. When given a choice between nest sites and displaced pups, females and males with low T preferred pups, whereas intact males and castrated males with T preferred nest sites. The findings are consistent with E. D. Ketterson and V. Nolan's (1994) hypothesis implicating T in mediating trade-offs between parental and sexual effort.
研究了睾酮（T）对雄性长爪沙鼠（Meriones unguiculatus）亲代行为的影响。去势后的雄性沙鼠被植入空胶囊或含T的胶囊；假手术的雄性沙鼠被植入空的硅橡胶胶囊。随后，将每只雄性沙鼠与一只怀孕的雌性沙鼠配对，分娩后，每天对每个家庭观察15分钟，持续20天。未接受T处理的去势雄性沙鼠与幼崽接触、蜷缩在幼崽周围以及舔舐幼崽的时间比假手术雄性沙鼠或接受T处理的去势雄性沙鼠都要多。当在巢穴和被移位的幼崽之间做出选择时，低T水平的雌性和雄性更喜欢幼崽，而完整的雄性和接受T处理的去势雄性则更喜欢巢穴。这些发现与E.D.凯特森和V.诺兰（1994年）的假设一致，即T参与介导亲代努力和性努力之间的权衡。
