Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 13 of 13
Full-Text Articles in Entire DC Network
Avian Ecology During Oak Savanna And Woodland Restoration In The Mid-South, Christine Ann Henderson
Avian Ecology During Oak Savanna And Woodland Restoration In The Mid-South, Christine Ann Henderson
Masters Theses
Disturbance-dependent ecosystems in the eastern United States have been declining since European settlement, and, in recent years, early-successional species have followed. My objective for this research was to determine if oak savanna and woodland restoration (i.e., overstory thinning and prescribed fire) was a viable method of recovering declining earlysuccessional species to the landscape of the Mid-South. At 3 sites, Catoosa Wildlife Management Area (CWMA; Tennessee), Green River Game Lands (GRGL; North Carolina), and Land Between the Lakes National Recreation Area (LBL; Tennessee), oak savanna and woodland restoration projects were established and maintained. Closed-canopy stands were thinned and a 2-year burn …
Response Of Grassland Birds To Agricultural Intensity At Different Spatial Scales In Texas, Anna Matthews, M. Clay Green, James Giocomo
Response Of Grassland Birds To Agricultural Intensity At Different Spatial Scales In Texas, Anna Matthews, M. Clay Green, James Giocomo
National Quail Symposium Proceedings
The decline in grassland birds is often associated with habitat loss due to intensity of conversion to agricultural lands and the alterations of natural disturbances. We sought to identify agricultural effects at differing scales that correlate to Texas grassland bird abundance, especially northern bobwhite (Colinus virginianus). Ninety-five roadside routes were surveyed in 20 Texas counties ranging from the Oklahoma border to the coastal plains. We conducted point counts in May and June from 2013 to 2016. To estimate the coarse effects of agriculture on bird abundance at a county level, we used number of cattle and area of …
Temporal And Spatial Trends Of Northern Bobwhite Survival And Nest Success, Chad J. Parent, Fidel Hernandez, David B. Wester, Fred C. Bryant
Temporal And Spatial Trends Of Northern Bobwhite Survival And Nest Success, Chad J. Parent, Fidel Hernandez, David B. Wester, Fred C. Bryant
National Quail Symposium Proceedings
The northern bobwhite (Colinus virginianus) has been declining in abundance across North America for many years. It is unknown, however, if other population variables also exhibit this downward trajectory. We conducted a retrospective-analysis of annual survival and nest success based on a literature review of 64 studies and compared these estimates temporally and spatially. We hypothesized that increased management efforts influenced bobwhite survival in the 1990s. Evidence from linear splining indicated survival trends changed in 1994. Thus, we compared trends across 3 periods: before 1994, after 1994, and overall. Mean (6 SD) annual survival was 13.9 6 9.4% across 31 …
Half-Cutting As A Management Tool To Increase Abundance Of Northern Bobwhite In South Texas, Dale A. Hall, Nova J. Silvy
Half-Cutting As A Management Tool To Increase Abundance Of Northern Bobwhite In South Texas, Dale A. Hall, Nova J. Silvy
National Quail Symposium Proceedings
We evaluated the effectiveness of half-cutting honey mesquite (Prosopis glandulosa) trees to increase northern bobwhite (Colinus virginianus; hereafter bobwhite) habitat and abundance in South Texas. We compared the effects of half-cutting on the survival of mesquite and its effects on understory vegetation on both treated and control areas monthly. Data were taken under the tree’s canopy to determine understory plant species diversity, height, and density. We used bobwhite whistle counts, mark-recapture, and searched with trained dogs to determine the effects of half-cutting on bobwhite abundance. Half-cut young trees had 23.1% greater survival than did older half-cut trees. The area protected …
Population Response Of Northern Bobwhite To Field Border Management Practices In Mississippi, Mark D. Smith, L. Wes Burger Jr.
Population Response Of Northern Bobwhite To Field Border Management Practices In Mississippi, Mark D. Smith, L. Wes Burger Jr.
National Quail Symposium Proceedings
Empirical relationships of the intensity and spatial extent of field border management required to elicit measurable population responses of northern bobwhite are needed. We established 90.5km of herbaceous field borders (6.1 m wide) along row crop field edges on one half of each of 3 - 800-ha agricultural landscapes in northeast Mississippi. Mean percentage of row crop fields established in field borders was 6.0%. During 2000 - 2002, we measured breeding season abundance and fall density on all 3 sites and survival of radiomarked bobwhite on 2 of the 3 sites. We used space-use models of bobwhite habitat composition and …
Effects Of Timber Density On Northern Bobwhite Autumn Abundance, Ian T. Little, Shane D. Wellendorf, William E. Palmer, John P. Carroll
Effects Of Timber Density On Northern Bobwhite Autumn Abundance, Ian T. Little, Shane D. Wellendorf, William E. Palmer, John P. Carroll
National Quail Symposium Proceedings
Mature pine (Pinus spp.) ecosystems maintained with frequent prescribed fire are the primary habitat of northern bobwhites (Colinus virginianus) in the Red Hills region of northern Florida and southern Georgia. Timber volume is thought to be negatively related to bobwhite abundance; however, this relationship has not been quantified. We related mean basal area of mature trees (>15cm dbh) to autumn covey call count indices at 23 locations on 6 study areas with varying timber volume, but similar bobwhite management practices, 2002 - 2004. Bobwhite abundance was inversely related to timber volume (r = -0.61, P = 0.002). Adjusted covey …
Management Implications Of Estimating Abundance Of Quail Inhabiting Forest Environs In Mexico, Jack C. Eitniear, John T. Baccus
Management Implications Of Estimating Abundance Of Quail Inhabiting Forest Environs In Mexico, Jack C. Eitniear, John T. Baccus
National Quail Symposium Proceedings
Estimating abundance of forest quail in Mexico offers unique challenges to wildlife managers. Unlike quail inhabiting grassland, forest quail are often cryptic, live in inaccessible mountainous areas, and unpredictably respond to playback census techniques. During 1996–1999, we estimated abundance of singing quail (Dactylortyx thoracicus) and bearded wood quail (Dendrortyx barbatus) in northeast Mexico. Singing quail were visually counted at El Cielo Biosphere Reserve, Tamaulipas, along 14 transects varying in length from 1,400 to 5,000 m. Because of the cryptic nature of bearded wood quail, visual counts proved unsuccessful in estimating abundance. Therefore, a tape recording of their chorus call was …
Fine Scale Influence Of Weather On Northern Bobwhite Abundance, Breeding Success, And Harvest In South Texas, Robert M. Perez, James F. Gallagher, Michael C. Frisbie
Fine Scale Influence Of Weather On Northern Bobwhite Abundance, Breeding Success, And Harvest In South Texas, Robert M. Perez, James F. Gallagher, Michael C. Frisbie
National Quail Symposium Proceedings
Weather plays a substantial role in annual changes in populations of northern bobwhite (Colinus virginianus) within and among ecological regions. Few studies have tested this relationship within the confines of specific sites. We examined the fine scale influence of annual (12-month), seasonal (6-month), and monthly Modified Palmer Drought Severity Indices (PMDI) and raw precipitation on abundance, breeding success, and harvest of northern bobwhites on 2 sites in south Texas. We used 18 years (1984–01) of roadside census, juvenile : adult ratios, and harvest records from the Chaparral Wildlife Management Area (CWMA) in La Salle County and 15 years (1984–99) of …
Quail Management: Issues, Concerns, And Solutions For Public And Private Lands - A Southeastern Perspective, L. Wes Burger
Quail Management: Issues, Concerns, And Solutions For Public And Private Lands - A Southeastern Perspective, L. Wes Burger
National Quail Symposium Proceedings
Biologists generally assume that habitat loss, fragmentation, and conversion resulting from changes in landuse are primarily responsible for the nearly rangewide declines in northern bobwhite (Colinus virginianus) abundance noted since at least 1990. Few data-based analyses have addressed this relationship at broad spatial scales. We used data on northern bobwhite abundance from the North American Breeding Bird Survey (BBS; 1966–1999) and county-level landuse from the U.S. Census of Agriculture (COA; 1978, 1987, 1997) to evaluate how 9 landuse variables related to northern bobwhite abundance at the rangewide spatial scale. We also explored the relationship between cropland cover and northern bobwhite …
Arizona Quail: Species In Jeopardy?, Ron Engel-Wilson, William P. Kuvlesky Jr.
Arizona Quail: Species In Jeopardy?, Ron Engel-Wilson, William P. Kuvlesky Jr.
National Quail Symposium Proceedings
We begin the 21st century with the Midwestern northern bobwhite (Colinus virginianus) range reduced to a small portion of its historic distribution. This precipitous decline occurred largely during the last quarter of the 20th century, coincident with widespread intensive agricultural land use, unchecked natural plant succession, and frequent severe weather. Various bobwhite enthusiasts of the 1960s–1980s era including Klimstra, Dumke and Stanford had evaluated agricultural land use trends and predicted the near demise of bobwhites that we now lament. Alarmed upland bird hunters have repeatedly spurred policy makers and administrators into action. However, because bobwhites still are only an incidental …
Correlates Of Northern Bobwhite Distribution And Abundance With Land-Use Characteristics In Kansas, Stephen J. Brady, Curtis H. Flather, Kevin E. Church, Eric W. Schenck
Correlates Of Northern Bobwhite Distribution And Abundance With Land-Use Characteristics In Kansas, Stephen J. Brady, Curtis H. Flather, Kevin E. Church, Eric W. Schenck
National Quail Symposium Proceedings
County-level agricultural statistics were correlated with Rural Mail Carrier Survey reports and Breeding Bird Survey data for northern bobwhite (Colinus virginianus) in Kansas. Results indicate statewide analysis is feasible when temporally congruent data exist for both agricultural land-use characteristics and bobwhite distribution and abundance. Interpretations of these results can be useful in state or regional analysis and in the development of habitat management strategies for bobwhite. The Multiple Response Permutation Procedure identified 16 land-use variables, 3 soil variables, and 1 spatial variable that were significantly different in counties where bobwhite were present from counties where they were absent. Sixteen land-use …
Population Trends Of Quails In North America, Kevin E. Church, John R. Sauer, Sam Droege
Population Trends Of Quails In North America, Kevin E. Church, John R. Sauer, Sam Droege
National Quail Symposium Proceedings
We used North American Breeding Bird Survey data (1966-91) to estimate distribution, relative abundance, and population trends of quails. Population trends in grassland/shrub birds sympatric with northern bobwhite (Colinus virginianus) were also examined. Northern bobwhite and scaled quail (Callipepl,a squamata) populations have declined since 1966. Rates of decline for these quails have increased during the past decade. California quail (C. califomica), Gambel's quail (C. gambelii), and mountain quail (Oreortyx pictus) populations have been stable over the long-term (1966-91). However, the short-term (1982-91) trend for California quail is positive, whereas Gambel's quail appear to be declining. Patterns in trends indicate similar …
Spatially Explicit Population Estimates Of The Florida Black Bear, Jacob Michael Humm
Spatially Explicit Population Estimates Of The Florida Black Bear, Jacob Michael Humm
Masters Theses
The Florida black bear (Ursus americanus floridanus) is currently comprised of 7 isolated subpopulations: Apalachicola, Eglin, Osceola, Ocala/St. Johns, Chassahowitzka, Highlands/Glades, and Big Cypress. The last statewide assessment of Florida black bear population dynamics was conducted by Simek et al. (2005) using traditional capture-markrecapture methods. The subspecies was removed from Florida’s List of State Threatened Species in 2012 contingent upon the formulation of a management plan that would maintain viable subpopulations of black bears in suitable habitat. Accurate population estimates for each of the remaining black bear subpopulations in Florida were needed to achieve the management goals of …