Lopak Vanessa, Eikelboom Roelof
Department of Psychology, Wilfrid Laurier University, Waterloo, ON, Canada N2L 3C5.
Physiol Behav. 2004 Oct 30;83(1):157-64. doi: 10.1016/j.physbeh.2004.08.009.
The present experiments explored how manipulating the period of individual housing, partner novelty, or short periods of conspecific interaction affected the feeding suppression evident when young adult male rats were moved from individual to pair housing. In the first experiment, after a period of pair housing, rats were individually housed for 0, 3, 10, or 14 days before being rehoused with either the same or a novel partner. There was an increase in the feeding suppression as the duration of individual housing grew, and at 3 days, the novel partner produced a stronger suppression than did the familiar partner. In the second experiment, four 15-min exposures to a conspecific in a novel place preference environment did not eliminate the feeding suppression at pair housing. The third experiment found that four 90-min exposures to a conspecific reduced the feeding suppression evident at rehousing. In Experiments 2 and 3, an environment previously paired with a conspecific did not produce a place aversion. Together, these experiments suggest that the feeding suppression evident when male rats are moved from individual to pair housing can be considered a graded effect open to modulation by a variety of behavioral manipulations.
本实验探究了改变单独饲养时长、伙伴新奇性或短暂的同种互动期，如何影响年轻成年雄性大鼠从单独饲养转换为成对饲养时明显出现的进食抑制现象。在第一个实验中，经过一段时间的成对饲养后，大鼠在与相同或新奇伙伴重新合笼前，分别单独饲养0天、3天、10天或14天。随着单独饲养时长的增加，进食抑制增强，且在单独饲养3天时，新奇伙伴比熟悉伙伴产生更强的抑制作用。在第二个实验中，在新奇位置偏好环境中让大鼠与同种个体进行4次15分钟的接触，并未消除成对饲养时的进食抑制。第三个实验发现，让大鼠与同种个体进行4次90分钟的接触，可减轻重新合笼时明显的进食抑制。在实验2和实验3中，先前与同种个体配对过的环境并未产生位置厌恶。综合来看，这些实验表明，雄性大鼠从单独饲养转换为成对饲养时明显的进食抑制可被视为一种分级效应，可通过多种行为操作进行调节。
