Robert J. Warren

Subjectivity of tooth wear and replacement (i.e., Severinghaus technique) for estimating ages of white-tailed deer (Odocoileus virginianus) is sometimes questioned. To further quantify Severinghaus's description of tooth wear, we used digital photographs and computer-assisted technologies to measure dentine and enamel widths on molars of 67 wild, known-aged deer from South Carolina. Accurate measurements of dentine: enamel ratios did not clearly separate 2.5, 3.5, and 4.5-year-old deer because of excessive variability within age classes. Therefore, we used K-nearest neighbor [KNN] analysis...

Habitat needs of wildlife are important for science-based wildlife management. Further, these needs may differ based upon the ecosystem in which the species lives. Bobcat habitat use within the longleaf pine (Pinus palustris) forest ecosystem has received little attention. Therefore, we monitored 21 bobcats (Lynx rufus) (8 M, 13 F) during 2001-2002 in southwestern Georgia to determine habitat use at two different spatial scales: (1) habitat associated with each animal's locations relative to habitat composition of its home range and (2) habitat composition of each bobcat's home range...

We quantified bobcat (Lynx rufus) diet on a longleaf pine (Pinus palustris) dominated area managed for northern bobwhite (Colinus virginianus), hereafter quail. We sorted prey items to species when possible, but for analysis we categorized them into 1 of 5 classes: rodent, bird, deer, rabbit, and other species. Bobcat diet did not differ seasonally (X2 = 17.82, P = 0.1213). Most scats (91%) contained rodent, 14% contained bird, 9% contained deer (Odocoileus virginianus), 6% contained rabbit (Sylvilagus sp.), and 12% contained other. Quail remains were detected in only 2 of 135 bobcat scats...

In the 20th Century, white-tailed deer (Odocoileus virginianus) populations in the United States increased dramatically. In many states, management objectives for deer have changed from conserve and increase to control and decrease. Diversity among stakeholder's objectives for deer populations has made management difficult. Many states in the northeastern and midwestern United States began struggling with urban deer management in the 1980s, whereas southeastern states have only recently encountered this challenge. We reviewed written policies from Georgia, South Carolina, North Carolina,...

Conservation Rangers in the Georgia Department of Natural Resources (DNR) face new challenges that have resulted from social and ecological changes caused by urbanization during the past 10-20 years. As the type of natural resource user in Georgia has changed, so has the role and responsibility of the conservation ranger. These changes include increased numbers of boaters, decreased numbers of hunters, an increased emphasis on education of the public by law enforcement personnel, and new laws (some of which are not game and fish laws) to enforce. As a result of these trends, conservation...

We implanted radio transmitters in 11 armadillos (Dasypus novemcinctus) on Cumberland Island, Georgia, and monitored them seasonally from July 1987 through May 1988. Six individuals survived (S) the entire study: 5 died (D) between 1-4 months post-implantatin. Home range sizes for S individuals did not differ significantly between sexes (N=6; 3 males and 3 females). Mean overall home range size was significantly smaller for S compared to D armadillos for both the minimum convex polygon (MCP) (S=6.55 ha, D = 11.55 ha; F = 12.49, df=1, P <0.002) and adaptive kernel (AK) (S=9.47 ha, D = 18...

In the 1970s, the nine-banded armadillo (Dasypus novemcinctus) invaded Cumberland Island, Georgia, which includes a federally designated wilderness area where native flora and fauna are protected by the National Park Service. Because of concerns about the potential ecological effects of this exotic mammal on the island's protected ecosystems, we collected 171 armadillos to determine their diets by stomach content analysis. We measured relative amounts of each food on a seasonal basis for a sub-sample of armadillos from oak-palmetto (N=44) versus oak-pine (N=43) habitats. Food habits of...

We describe a new, non-destructive procedure for visually estimating forage biomass based on volumetric cover. The accuracy of this procedure was tested against actual dry biomass by clipping and weighing 41 plots of wax myrtle (Myrica cerifera). Visual estimates of forage biomass were significantly related (P ≤ 0.001) to actual biomass determine by clipping (r2 = 0.925; y = 16.36 + 2.52 X, where y = dry biomass and X = volumetric cover). We developed this procedure to apply 3 white-tailed deer (Odocoileus virginianus) habitat suitability index (HSI) models to a suburban development. The 3...

Detailed knowledge of a species' biology and ecology is required before sitespecific management programs can be implemented. Therefore, we examined seasonal changes in food habits, nutritional status, and reproduction in a sample of 54 feral hogs (Sits scrofa) collected over a 2-year period from Cumberland Island National Seashore, Georgia. Seasonal variations in food habits probably were related to changes in food availability. Differences in seasonal rainfall patterns between years appeared to be related to dietary changes. No significant seasonal changes in body mass, fat indices, or...

Forty bobwhites (Colinus virginianus) were collected in late winter of 2 years from a variety of habitats in northwestern Texas to evaluate the use of wing fat and gizzard fat as predictors of body fat. No differences were found in body fat between sexes or between years. Regression analyses revealed that the best predictor of body fat was wing fat, which was related to body fat in an exponential, rather than linear, fashion. A logarithmic model (Y = e-0.0 6 + 0.17X, R2 = 0.68, P < 0.0001) best described the observed curvilinear relationship between body fat (g) and wing fat (%). The...