Reproductive and demographic parameters in two Iberian wild boarSus scrofa populations

摘要: From 1990 to 2006, we studied the demographic, reproductive, and biometric characteristics of two Iberian wild boarSus scrofa (Linnaeus, 1758) populations in contrasting environments. In Pyrenees (studied 1990–1993), forest cover is high, hunting pressure low, density boar high. Ebro Valley 1994–2006), there are few shelter areas for boars, very low. second semester life after years age, sows were heavier than those Pyrenees. Pregnancy during first year was frequent rare Litter sizes, ovulation rates, intrauterine mortalities did not differ significantly between populations, but foetal sex ratio skewed towards males. Life expectancy lower (6 yr) it (10 yr). 75% >24 months old, whereas Pyrenees, proportion 59%. We suggest that availability influenced growth, productivity, pressure, boar.