Price E O
Anim Behav. 1980 Aug;28 Pt 3:657-67. doi: 10.1016/s0003-3472(80)80126-6.
The copulatory behaviour of male wild Norway rats (Rattus norvegicus) exposed individually to females in hormone-induced oestrus is characterized by fewer mounts and intromissions per ejaculatory series, shorter ejaculation latencies, and longer ejaculatory clasps than the copulatory behaviour of domestic males. Competition between wild and domestic males testes simultaneously in pairs produced only minor changes in copulatory behaviour. The reproductive success of wild and domestic male pair simultaneously exposed to naturally cycling females was nearly equal in both the laboratory and an outdoor enclosure. Genotype of the female had little effect on male copulatory behaviour. The copulatory behaviour of sexually naive and experienced domestic rats did not differ. However, most sexually naive wild males failed to exhibit copulatory behaviour under the test conditions employed.
单独暴露于处于激素诱导发情期的雌性大鼠面前时，雄性野生挪威大鼠（褐家鼠）的交配行为具有以下特点：与家养雄性大鼠的交配行为相比，每个射精系列中的爬跨和插入次数更少、射精潜伏期更短、射精抱握时间更长。野生雄性大鼠和家养雄性大鼠的睾丸成对同时竞争时，交配行为仅产生轻微变化。同时将野生雄性大鼠和家养雄性大鼠暴露于自然发情周期的雌性大鼠面前时，在实验室和室外围栏中，它们的繁殖成功率几乎相等。雌性大鼠的基因型对雄性大鼠的交配行为影响很小。性经验缺乏的家养大鼠和有性经验的家养大鼠的交配行为没有差异。然而，在所用的测试条件下，大多数性经验缺乏的野生雄性大鼠未能表现出交配行为。
