Biological consequences of winter‐feeding of mule deer in developed landscapes in Northern Utah

Abstract

AbstractWinter‐feeding of mule deer (Odocoileus hemionus) in developed landscapes is often advocated by stakeholders to compensate for lost or fragmented winter range. However the reported benefits of winter‐feeding mule deer to increase survival and productivity in altered landscapes are mixed. Few studies have examined the long‐term effects of winter‐feeding on mule deer productivity. We studied the effects of a winter‐feeding program conducted in a developed landscape in northern Utah, USA from 2001 to 2006 on the productivity, survival, and mortality of 92 adult female deer (does) that were captured and radiocollared on 4 feed and 4 nonfeed sites. We also evaluated the potential for feeding programs to impact winter‐range habitat quality through increased browse utilization. Fawn production (P = 0.36), and survival (P = 0.12) did not differ for fed and nonfed does. Deer–vehicle collisions were the primary cause of mortality for radiocollared deer in both populations (P = 0.97). Utilization of desired browse species was higher on sites where deer were fed (P ≤ 0.001), although deer numbers were similar at feed and nonfeed sites. When developing big game winter‐feeding policies for developed landscapes, managers must consider the full range of long‐term potential population and habitat impacts to include increased anthropogenic‐related mortality and increased potential for habitat degradation prior to policy implementation. © 2011 The Wildlife Society.