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Showing 1 to 20 of 97 for “"Age class"”.
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Population Structure Based on Age-Class Distribution of <em>Tapirus polkensis</em> from the Gray Fossil Site Tennessee.
… collected from the site were arranged in a rough age class system separated into 7 categories based on the teeth present and amount of dental wear. Such an eruption series is useful for general comparisons amongst the individual tapirs; however, the classes do not represent an age in years due to …
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Attitudes toward women's roles: a study of selected undergraduate students at Rowan University
… was the impact of demographic factors such as age, class level, class status, major, gender and race. The data on the attitudes toward women's roles was collected using a 25 item Likert-scale survey. The data analysis suggests that the selected students had a profeminist, egalitarian attitude …
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Population Status of Beaver on the Free-running Missouri River in Southeastern South Dakota
… males and 70 were females (131:100 sex ratio). Age specific sex ratios were not significantly different (P >0.05) from a 1:1 ratio for all age classes. The age structure of the sample was 69:26:45:15:4:3 for age classes zero through five, respectively. Minimum breeding age for female beaver was …
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Derivation of data for estimating coastal Virginia's potential timber growth
… acre expected of coastal Virginia forests on average site, by age class and cubic-foot stocking.
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Sexually Dimorphic Developmental Patterns of Chemosensory Behaviors in African Elephants (Loxodonta Africana)
… differences between the sexes and across four age classes (calves, juveniles, subadults and adults) in the performance of chemosensory behaviors. African elephants were studied at a waterhole in 2004-5 at Ndarakwai Ranch, Tanzania. I identified 277 elephants and 26 distinct female-offspring …
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Cover Use and Activity Time Budget of Blue-Winged Teal, Mallard, and Pintail Broods
… wetlands were evaluated by species and brood age-class. Activity time budgets revealed significant (p<.01) age specific differences in total feeding time and visibility among age-classes of all species combined and age-classes of blue-winged teal broods. Feeding modes also varied among …
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An Examination of Aggressive Behavior in Indo-Pacific Bottlenose Dolphins (<i>Tursiops Aduncus</i>)
… The purpose of the study was to determine if age class, sex, approach angle, and body posture influenced aggression within this population. The area of the recipient's body towards which aggression was directed was also examined to determine which body parts were most commonly attacked, if …
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Novel Applications of Multivariate Methods for Exploring Personality in African Elephants
… data set and on subsets of behaviors for each age class. I calculated the angular differences among major axes of covariation from the ordinations of subsets to determine if the behaviors that defined personalities differed by age class. I also defined personalities by centroids (in …
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Analysis and Conservation of Native Forests at Kessler Mountain Fayetteville, Arkansas
… controversy and consideration of other management alternatives. A twist of fate involving an economic recession, a dedicated group of outdoor recreation enthusiasts, and environmental conservationists led to the permanent protection of 384 acres in the Kessler Mountain Regional Park. To …
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Aging Validation, Growth, and Comparison of Four Age Estimators of the River Redhorse (Moxostoma Carinatum)
Four possible age estimators of river redhorse, otoliths, opercles, scales, and fin rays, were compared for accuracy, precision, and reliability. Validation of annulus formation, using marginal increment analysis, indicated that opercles and otoliths form an annulus from late May to late June. …
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Development of a prototype model for optimizing silvicultural investment on a diverse forest ownership in central Maine
… of moving the ownership to a more balanced age class distribution. This consideration is overshadowed at the present time by an impending softwood shortage.
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Development and assessment of remotely derived variables in current southern pine beetle (Dendroctonus frontalis Zimm.) hazard mapping in North Carolina, USA
… including stand density, growth rate, age, soil type, and position on the landscape. This work was undertaken in an effort to assist and improve on the current federal SPB hazard modeling being conducted for North Carolina by the USDA Forest Service – Forest Health Protection's Forest …
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Age, Growth, and Population Structure of Black Redhorse (Moxostoma Duquesnei) and Golden Redhorse (Moxostoma Erythrurum) in Southwest Missouri
Otoliths (lapilli) were used to age black redhorse (Moxostoma duquesnei) and golden redhorse (Moxostoma erythrurum) from three White River tributaries (James River, Bull Creek, and Swan Creek) and one Arkansas River tributary (Elk River) in southwest Missouri. Validation of annulus formation in …
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Evaluation of Mixed-Vegetation Plantings As Avian Nesting Habitat in Eastern South Dakota
… planted as avian nesting cover on wildlife management units. However in the recent past, there has been a trend toward planting native warm-season grasses. In 2000, South Dakota Game, Fish and Parks (SDGFP) began planting mixtures of cool-season and warm-season native grasses with non-native …
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The Impact of Logging on Aquatic Salamander Communities.
… Body sizes of salamanders, used to represent age class, were analyzed to determine if the age/size structures of the populations were altered. This parameter was not impacted significantly by logging; all age/size classes of the populations were equally affected.</p>
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Using Geographical Information Systems to Investigate Spatial Patterns in Fossils of Tapirus polkenis from the Gray Fossil Site, Washington County, Tennessee
… and two at the specimen level, articulation and age class. Weathering, arthritis, and articulation, show clustered patterns indicating that the site had active predators, it consisted of many microenvironments, and deposition occurred in a passive setting. Although the current state of excavation …
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Productivity, Movements, and Habitat Use of Nesting and Brooding Wild Turkey Hens in Gregory County, South Dakota
… range size increased 3-fold from the 0-4 week age class (Age 1) to the 4+ week age class (Age 2). Broods used habitats in proportion to availability within ranges. However, grasslands were used more than expected (P<0.05) between 0631 hr and 1130 hr over the summer, and less than expected …
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Analysis of long-term changes in populations of the Clanwiliam Cedar (Widdringtonia cedarbergensis) using repeat photography
… and environmental data to determine the age class and degree of foliage cover, as well as fire frequency, rockiness of habitat, altitude, aspect of slope, annual mean temperature and annual precipitation for each tree viewed in photosets. Mortality and recruitment events were documented …
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Techniques for Evaluating Power Plant Discharges Using In-Situ Breakdown and Flow Though Laboratory Sediment Bioassays
… sediments. Comparitive sensitivity of this age class demonstrated them to be equally or more sensitive than other commonly used sediment test organisms including Chironomus tentans, Daphnia magna and Hyalella azteca for survival and growth endpoints in 10-day exposures. Survival and growth …
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Determining Proportions of Game Animals Using Remote Censusing Camera Systems on Hunted and Non-Hunted Areas
… on the hunted and non-hunted areas. The breeding-age deer were grouped into two age classes: 1 1/2 and 2 1/2 years or older. The cameras were placed in travel corridors to detect game in their natural movement patterns. The deer information was used in a harvest model to predict the future trends …
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