Albert D J, Jonik R H, Tanco S A, Walsh M L
Psychology Department, University of British Columbia, Vancouver, Canada.
Physiol Behav. 1992 Oct;52(4):727-9. doi: 10.1016/0031-9384(92)90405-q.
Female rats were housed with a sterile male or another female. After 3 weeks, half of the females that had been housed with a female were rehoused with an intact male. At the end of 6 weeks female or sterile male cagemates were removed. Intact male cagemates and pups were removed 3 to 12 h following parturition. All females were tested for retrieval of three unfamiliar pups placed in their cage on the day following removal of their cagemate. Three unfamiliar pups were placed with each female and the female's behavior observed for 10 min. Observations were made in this way for 13 days or until the female retrieved all three pups within the 10-min interval. Pups were left with the female on days they were not retrieved. Females housed with a sterile male reached criterion for pup retrieval in 2.9 days, significantly fewer days than were required for females housed with another female (6.6 days) but significantly more than were required for a postpartum female (0.8 days). By demonstrating that cohabitation with a male fosters the development of retrieval, these results support evidence from the study of aggressive behavior that pseudopregnancy facilitates the development of behaviors associated with pregnancy and lactation.
将雌性大鼠与无菌雄性大鼠或另一只雌性大鼠饲养在一起。3周后，将与雌性大鼠饲养在一起的雌性大鼠中的一半与一只未阉割的雄性大鼠重新饲养在一起。在6周结束时，将雌性或无菌雄性同笼伙伴移走。在分娩后3至12小时，将未阉割的雄性同笼伙伴和幼崽移走。在移走同笼伙伴后的第二天，对所有雌性大鼠进行测试，观察它们对放置在其笼中的三只陌生幼崽的找回情况。给每只雌性大鼠放置三只陌生幼崽，并观察该雌性大鼠10分钟的行为。以这种方式观察13天，或者直到雌性大鼠在10分钟内找回所有三只幼崽。在未被找回的日子里，幼崽留在雌性大鼠身边。与无菌雄性大鼠饲养在一起的雌性大鼠在2.9天内达到了找回幼崽的标准，所需天数明显少于与另一只雌性大鼠饲养在一起的雌性大鼠（6.6天），但明显多于产后雌性大鼠所需天数（0.8天）。通过证明与雄性大鼠同居促进了找回行为的发展，这些结果支持了来自攻击行为研究的证据，即假孕促进了与妊娠和哺乳相关行为的发展。
