Abstract: We investigated whether different nest environments would influence the vitality and survival of neonates and the dam’s maternal behavior. We designed four different nests: A,AB,AC,AD, B was traditional type. We judged the effect of nest enviroment on maternal behaviour by nest building and kit-retrieval test on 5 d, the kit survival and growth as well. The results showed as follow: treatment neither affect the within-litter variation in body weight of live kit and the neonates number. AC nest type was beneficial for the maternal behavior and decrease the survival of live-born until 14 d and average weight. The new nests got an advantage of traditional type on heat retaining property and keeping kit alive.

Key words: mink; nest enviroment; maternal behaviour; nest building; mortality