The breeding biology of introduced hedgehogs (Erinaceus europaeus) on a Scottish Island: lessons for population control and bird conservation

摘要: The breeding biology of a recently (1974) introduced hedgehog Erinaceus europaeus population was studied on large Scottish island. These hedgehogs have caused serious declines in internationally important ground-nesting shorebirds, and control is now being attempted. Sexual behaviour commenced late April, few days after the main emergence from hibernation. It peaked mid-May again June/early July, ceased by mid-August. Females were promiscuous estimated to sexual encounters (although not necessarily matings) with at least five males during mating period. Two-thirds females attempted breed for first time their second calendar year (i.e. as sub-adults), rest third adults). At 96% (n=27) adult early part season (litters born June). vast majority (81%, n=26) bred later mid-July). Breeding success (≥1 young emerged) relatively high. For adults, 63% (n=24) early-season 86% (n=18) late-season attempts successful. sub-adult figure 62% (n=9). annual mean productivity per female 4.04 adults 0.85 sub-adults. implications these results effectiveness, timing welfare aspects programmes are discussed.