Weil Zachary M, Bowers Stephanie L, Nelson Randy J
Department of Psychology and Neuroscience, The Ohio State University, Columbus, OH 43210, USA.
Behav Brain Res. 2007 May 16;179(2):305-9. doi: 10.1016/j.bbr.2007.02.003. Epub 2007 Feb 6.
This study examined photoperiodic regulation of affective behaviours in collared lemmings (Dicrostonyx groenlandicus). Male and female lemmings were housed in either long (LD 22:2), intermediate (LD 16:8), or short days (LD 8:16) for 9 weeks. Exposure to short days induced moult to a winter pelage and gonadal regression in male, but not female, lemmings. Lemmings housed in long days reduced anxiety-like responses in the elevated plus maze. Depressive-like behaviours were decreased in the intermediate photoperiod relative to other photoperiod groups.
本研究考察了环颈旅鼠（Dicrostonyx groenlandicus）情感行为的光周期调节。将雄性和雌性旅鼠分别置于长日照（LD 22:2）、中间日照（LD 16:8）或短日照（LD 8:16）环境中9周。短日照使雄性旅鼠换毛为冬季皮毛并导致性腺退化，但雌性旅鼠未出现这种情况。处于长日照环境中的旅鼠在高架十字迷宫中焦虑样反应减少。与其他光周期组相比，处于中间光周期的旅鼠抑郁样行为减少。
