“母体应激能影响根田鼠子代冬季存活吗？一个野外实验” 一文在Oikos杂志上发表

Jiang-hui Bian（边疆晖）,Yan Wu （吴雁）, Lowell L. Getz , Yi-Fan Cao（曹伊凡）, Fang Chen（陈芳）, Le Yang（杨乐）.Does maternal stress infl uence winter survival of offspring in root voles Microtus oeconomus? A fi eld experiment, Oikos. 2011,120: 47–56, IF=3.398(全文链接见附件)

Abstract:Maternal stress can have long-term adverse consequences on immunocompetence and disease risk of off spring, and winter survival is a crucial demographic parameter in the life-history of an individual that can substantially aff ect northern rodent opulation dynamics. An understanding of the eff ects of maternal stress on winter survival of off spring may help identify mechanisms driving population fl uctuations of northern small mammals. Th us, we assessed the eff ects of maternal stress, resulting from high population densities, on winter survival of fi rst generation (F 1 ) and second generation (F 2 ) in root voles Microtus oeconomus . Replicate high- and low-density enclosed parental populations were established, from which we obtained F 1 eneration that were used to establish new enclosed, equal-density populations. Th e adults of the high-density parental populations had higher corticosterone levels, an indication of physiological stress, than did those of the low-density parental populations. ver-winter survival of the F 1 generation voles from the low-density parental populations was greater than that of those from the high-density parental populations. Over-winter survival of F 2 generation voles did not diff er between the two treatments. Our results suggest that maternal stress aff ected over-winter survival of fi rst generations but not second generations. Reduced immunocompetence, resulting from high population density stresses, transferred to off spring may be a factor in annual (winter) population declines. Because the eff ect is transitory, i.e. immunocompetence of F 2 voles is not aff ected, reduced immunocompetence resulting from high density stresses would not contribute to lengthy periods of low population densities that are characteristic of multi-annual population fl uctuations.