Ontogenetic interaction between social relationships and defensive burying behavior in the rat
Ontogenetic interaction between social relationships and defensive burying behavior in the rat
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DOI：
10.1016/j.physbeh.2006.12.015
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发表时间：
2007-04-23
影响因子：
2.9
通讯作者：
Arakawa, Hiroyuki
中科院分区：
文献类型：
--
作者：
Arakawa, Hiroyuki
本实验旨在阐明与大鼠防御性掩埋行为发展相关的两性和社会关系因素。在幼年期和后期，大鼠被单独饲养，或在性别、年龄或熟悉程度上不同的情况下成对饲养。在实验1中，雌雄大鼠在幼年期单独饲养、与成年雌鼠饲养、与同龄雌鼠饲养时，掩埋行为都有所减少。在实验2中，幼年期被隔离的雌性大鼠在幼年期后与非隔离的同性大鼠一起饲养，其埋藏行为与与同伴一起饲养的大鼠相同；这在雄性大鼠中没有发现。在幼年期被隔离的雄鼠和雌鼠在隔离后一起饲养，成年后埋鼠行为减少。这些不同社会群体影响的性别差异可能是由于雄性大鼠在青春期和青春期后社会关系的差异，此时社会支配关系在雄性大鼠中出现。实验3研究了社会优势关系对雄性大鼠掩埋行为的影响。从属关系增加了被动防御的冻结倾向，而社会紧张伴随着成年雄性抚养产生了主动防御的埋葬行为减少。研究结果表明，包括玩耍接触在内的从属关系激活并维持了掩埋行为，但熟悉度不是重要因素，而优势关系调节了掩埋行为的模式。(c) 2007年Elsevier Inc.出版
The present experiments clarify sexual and social relationship factors related to the development of defensive burying behavior in rats. Rats were raised in isolation, or in a variety of pairs differing in sex, age or familiarity during the juvenile and post-juvenile period. In Experiment 1, decreased burying behavior was found in both male and female rats during the juvenile stage when they were reared in isolation, or with an adult female, or for males reared with a same-age female. In Experiment 2, female rats isolated during the juvenile stage who were reared after the juvenile stage with a same-sex, non-isolated rat, showed as much burying behavior as rats reared with a littermate; this was not found for male rats. When both male and female rats isolated during the juvenile stage were reared with each other after isolation, they maintained reduced burying behavior in adulthood. These sex differences in the effect of different social groupings are likely due to the differences in social relationships during the juvenile and after puberty, when social dominance relationships emerge in male rats. In Experiment 3, the effects of social dominance relationships on burying behavior were investigated in male rats. Subordination increased the freezing tendency as a passive defense, while social tension accompanied with rearing with an adult male produced decreased burying behavior as a proactive defense. These findings suggest that affiliative relationships involving playful contacts activate and maintain burying behavior, but familiarity is not a significant factor, while dominance relationships modulate the patterns of burying behavior. (c) 2007 Published by Elsevier Inc.