Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 7 of 7
Full-Text Articles in Biology
Evaluating The Illinois Stream Valley Segment Model As An Effective Management Tool, Stephen S. Warrner, Robert U. Fischer, Ann M. Holtrop, Leon C. Hinz Jr., James M. Novak
Evaluating The Illinois Stream Valley Segment Model As An Effective Management Tool, Stephen S. Warrner, Robert U. Fischer, Ann M. Holtrop, Leon C. Hinz Jr., James M. Novak
Faculty Research & Creative Activity
Stream habitat assessments are conducted to evaluate biological potential, determine anthropogenic impacts, and guide restoration projects. Utilizing these procedures, managers must first select a representative stream reach, which is typically selected based on several criteria. To develop a consistent and unbiased procedure for choosing sampling locations, the Illinois Department of Natural Resources and the Illinois Natural History Survey have proposed a technique by which watersheds are divided into homogeneous stream segments called valley segments. Valley segments are determined by GIS parameters including surficial geology, predicted flow, slope, and drainage area. To date, no research has been conducted to determine if …
Catch-Effort Estimation Of White-Tailed Deer Population Size, James M. Novak, Kim T. Scribner, William D. Dupont, Michael H. Smith
Catch-Effort Estimation Of White-Tailed Deer Population Size, James M. Novak, Kim T. Scribner, William D. Dupont, Michael H. Smith
Faculty Research & Creative Activity
Estimation of population size is important for most research in population biology and in the management of game species. Using a stochastic, catch-effort, competing risks model (Dupont 1983), we estimated the population size of the Savannah River Site white-tailed deer (Odocotleus virginianus) herd for 1965-86. Population size varied markedly in response to changes in both hunting method and pressure. Still hunters preferentially harvested older animals compared to dog hunters. Deer were 2.37 times more susceptible to harvest from dog hunting than from still hunting. Hunter-induced mortality was estimated as 1.73 and 4.10 times as large as nonhunting mortality for still …
Frequency Distribution Of Conception Dates In A White-Tailed Deer Herd, James M. Novak, Olin E. Rhodes, Michael H. Smith, Paul E. Johns
Frequency Distribution Of Conception Dates In A White-Tailed Deer Herd, James M. Novak, Olin E. Rhodes, Michael H. Smith, Paul E. Johns
Faculty Research & Creative Activity
Conception dates of white-tailed deer, Odocoi/eus virginia1111s (Zinunennann, 1780) were estimated for the breeding periods of 1974 - 76 and 1984 using fall and winter- spring fetal data. Conception dates estimated from data collected in the fall were biased. This bias resulted in an earlier mean conception date than that based on information which included data from later breeding females. Mean breeding dates differed significantly between female age classes due to delayed conception in fawns which also resulted in a skewed frequency distribution of conception dates. The frequency distribution of conception dates was leptokurtotic, suggesting that the distribution is constrnincd …
Assessment Of Fawn Breeding In A South Carolina Deer Herd, Olin E. Rhodes Jr., James M. Novak, Michael H. Smith, Paul E. Johns
Assessment Of Fawn Breeding In A South Carolina Deer Herd, Olin E. Rhodes Jr., James M. Novak, Michael H. Smith, Paul E. Johns
Faculty Research & Creative Activity
Annual variation in breeding success among female white-tailed deer (Odocoileus virginianus) fawns on the Savannah River Plant (1967 to 1985) was determined from direct counts of pregnancy in spring-collected fawn females and evidence of lactation and measurements of udder thickness in fall-harvested 1. 5-yearolds. Percent lactation in 1.5-year-old females collected during September and October gave the best estimate of fawn breeding in the previous year. The overall mean fawn breeding estimate from September and October was 41 % , and the yearly variation in fawn breeding was significant. An estimate of the average yearly contribution to recruitment was 43 fetuses …
Multiple Captures Of Peromyscus Le Uco Pus: Social Behavior In A Small Rodent, James M. Novak
Multiple Captures Of Peromyscus Le Uco Pus: Social Behavior In A Small Rodent, James M. Novak
Faculty Research & Creative Activity
The capture of more than one individual in a live trap can often provide information on the social behavior of small mammals, but the conclusions drawn from these data will depend on the type of live trap used. Davis (1955) and Getz (1972) used multiple capture traps and analyzed their data with respect to attraction and repulsion of individuals both within and between different age and sex classes. Petersen (1975), Feldhamer (1977), Blaustein and Rothstein (1978), Jenkins and Llewellyn (1981) and Spencer et al. (1982) gained information on the formation of associations during foraging and dispersal from multip~ captures made …
Germination Of Cow Parsnip Seeds From Grizzly Bear Feces, James M. Novak, Roger D. Applegate, Lynn L. Rogers, David A. Casteel
Germination Of Cow Parsnip Seeds From Grizzly Bear Feces, James M. Novak, Roger D. Applegate, Lynn L. Rogers, David A. Casteel
Faculty Research & Creative Activity
No abstract provided.
Distribution And Relative Abundance Of Small Mammals In The Illini Forest Plantation, Urbana, Illinois, James M. Novak
Distribution And Relative Abundance Of Small Mammals In The Illini Forest Plantation, Urbana, Illinois, James M. Novak
Faculty Research & Creative Activity
The abundance and distribution of small mammals were analyzed for correlation with the vegetational characteris· tics of their habitat. Positive correlations were found for the number of mammals trapped per area trapped versus the total ground cover (r= .67, P< .05) and for the number of mammal species versus total ground cover (r= .73, P<.05). The habitat preferences of the three species trapped (short-tailed shrews B/,arina brevicauda. white-footed mice Peromyscus leucopuus, and meadow voles Microtus pennsylvanicus) showed a distinct distributional pattern for the species in relation to their habitats. The management of forest-tree plantations to achieve high densities during the seedling stage and the use of silvicultural practices that promote high shrub densities are suggested as inexpensive and natural control measures for injurious microtine rodents. Seedlings must be permitted to reach a sufficient height to remove the risk of the shrubs overtopping them.