temps (durée) (1) reptile (1) densité (1) survie (1) Density (1) Clutches (1) Vipera berus (1) Time (1) Survival (1) Success (1) Proportion (1) Paternity (1) Males (1) Inbreeding (1) Fertility (1) Fathers (1) Density (1) Adulthood (1) Number (1) corps (1)