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Articles 91 - 120 of 122
Full-Text Articles in Natural Resources and Conservation
Data-Driven Planning For The Conservation Of Grassland Birds In The Central Hardwoods Bird Conservation Region, Cara J. Joos, Jane A. Fitzgerald, Christopher M. Lituma, James Giocomo, Larry Heggemann
Data-Driven Planning For The Conservation Of Grassland Birds In The Central Hardwoods Bird Conservation Region, Cara J. Joos, Jane A. Fitzgerald, Christopher M. Lituma, James Giocomo, Larry Heggemann
National Quail Symposium Proceedings
The Central Hardwoods Joint Venture held two workshops in 2006 to delineate bobwhite focus areas across the Central Hardwoods Bird Conservation Region (BCR) for targeting on-the-ground conservation efforts. From 2008 – 2012, we conducted randomized sets of point counts within counties containing bobwhite focal areas to assess the efficacy of that method for monitoring grassland birds within focal areas, and to assess relationships of conservation practices with bird species occupancy and abundance. We collected data on nine species of Partners in Flight priority species, including northern bobwhite (Colinus virginianus). Land cover types within a 200-m buffer of each …
A Method For Setting Northern Bobwhite Population And Habitat Objectives For Large Landscape Partnerships, James Giocomo, William Vermillion, Stephen Demaso, Barry Wilson, Jon Hayes, Kenneth Gee, Jesús Franco, Aimee Roberson, Robert Perez, Jeff Raasch, Bill Bartush, Benjamin Kahler
A Method For Setting Northern Bobwhite Population And Habitat Objectives For Large Landscape Partnerships, James Giocomo, William Vermillion, Stephen Demaso, Barry Wilson, Jon Hayes, Kenneth Gee, Jesús Franco, Aimee Roberson, Robert Perez, Jeff Raasch, Bill Bartush, Benjamin Kahler
National Quail Symposium Proceedings
Population and habitat objectives are the foundation for many conservation actions. Often objectives set at one scale are difficult to translate to larger or smaller scales. Three bird habitat Joint Ventures, Gulf Coast, Oaks & Prairies, and Rio Grande, working cooperatively with the Gulf Coast Prairie Landscape Conservation Cooperative, have a common objective to stabilize northern bobwhite (Colinus virginianus) populations in four Bird Conservation Regions. We cooperatively developed a method using the North American Breeding Bird Survey trend for several scenarios with different time horizons (10-, 20-, 30-year, or longer), the spring home range size, and the per …
How Many Are There? Estimating The North American Northern Bobwhite Population Size For Conservation Planning Purposes, James Giocomo, William Vermillion, Stephen Demaso, Arvind Panjabi
How Many Are There? Estimating The North American Northern Bobwhite Population Size For Conservation Planning Purposes, James Giocomo, William Vermillion, Stephen Demaso, Arvind Panjabi
National Quail Symposium Proceedings
Three bird habitat Joint Ventures, Gulf Coast, Oaks & Prairies, and Rio Grande, developed a method to set spring population and habitat objectives for northern bobwhite (Colinus virginianus) populations in four Bird Conservation Regions (BCRs). The method requires an estimate of current population size that can be stepped down to the management unit of interest. Several methods have been designed to estimate range-wide populations over the past two decades for fall (post-breeding) and spring (pre-breeding). The 2002 Northern Bobwhite Conservation Initiative (NBCI) provided an estimate of 6,714,000 birds for the 1999 breeding population. The 2007 Partners in Flight …
Automated Identification And Mapping Of Woody Habitat Using Digital Ortho Imagery, Keith Wethington
Automated Identification And Mapping Of Woody Habitat Using Digital Ortho Imagery, Keith Wethington
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) restoration efforts operate at multiple spatial scales, from landscape (regional) levels to farm level (local). Choosing proper data sources, analysis techniques, and accounting for differences in scale (minimum mapping unit) between sources are critical first steps to successfully delivering habitat information useful for broad regional planning efforts and site specific research and management activities. To this end, we compared 3 methods of creating a habitat map and associated data: National Landcover Dataset (NLCD) 2006, hand digitized from 2010 National Agriculture Imagery Program (NAIP) imagery, and an Interactive Supervised Classification of 1-m NAIP imagery using …
Uncertainty And The Entanglement Of Habitat Loss And Fragmentation Effects In The Management Of Northern Bobwhite, Mason H. Cline, Richard B. Chandler, Clinton T. Moore, James A. Martin
Uncertainty And The Entanglement Of Habitat Loss And Fragmentation Effects In The Management Of Northern Bobwhite, Mason H. Cline, Richard B. Chandler, Clinton T. Moore, James A. Martin
National Quail Symposium Proceedings
There is a need to understand the effects of habitat loss and fragmentation on northern bobwhite (Colinus virginianus) and other grassland bird species and relate this to conservation action and delivery, especially in areas of intensive anthropogenic development. Through our research, we investigated the factors contributing to habitat loss and fragmentation in order to prioritize management within the Gulf Coast Prairie Landscape Conservation Cooperative (GCP LCC) region of Texas, USA. For this geographic region, we completed these objectives: analyzed grassland bird habitat loss and fragmentation resulting from oil and gas development, which has become especially rapid in this …
Response Of Northern Bobwhite To Longleaf Pine Ecosystem Enhancement Through The State Wildlife Grant Program, Adam B. Butler, John P. Gruchy, Richard Hamrick, Matt Elliot
Response Of Northern Bobwhite To Longleaf Pine Ecosystem Enhancement Through The State Wildlife Grant Program, Adam B. Butler, John P. Gruchy, Richard Hamrick, Matt Elliot
National Quail Symposium Proceedings
The State Wildlife Grant (SWG) program provides funding through the U.S. Fish and Wildlife Service to benefit species of greatest conservation need as recognized by State Comprehensive Wildlife Conservation Plans (SCWCPs). The northern bobwhite (Colinus virginianus) is an important game bird that shares habitat overlap with many priority species identified within SCWCPs. Specifically, in longleaf pine forests the Federally Threatened gopher tortoise (Gopherus polyphemus) is dependent upon similar understory conditions as are bobwhite. As part of a multistate competitive SWG funded to enhance gopher tortoise habitat, we applied selective herbicide treatments and prescribed fire to longleaf …
National Bobwhite Conservation Initiative Focus Area Monitoring In The 2c Focus Area, Missouri, Beth Emmerich, W. T. White, E. Lee Metcalf
National Bobwhite Conservation Initiative Focus Area Monitoring In The 2c Focus Area, Missouri, Beth Emmerich, W. T. White, E. Lee Metcalf
National Quail Symposium Proceedings
The Missouri Department of Conservation (MDC) began establishing Quail Focus Areas (QFAs) on private lands in 2004. The goal of QFAs is to increase and expand quail habitat management efforts at a larger scale. Because most (93%) of Missouri’s landscape is in private ownership, habitat improvement programs on private lands have greater potential to impact quail populations than on public lands alone. In spring of 2013, a group of MDC staff and Quail Forever biologists began monitoring bobwhite quail (Colinus virginianus) and songbirds in a portion of the 2C QFA in Carroll County, Missouri as well as in …
Habitat Space Used By Northern Bobwhites And Texas Tortoises On South Texas Rangelands, Ross O. Couvillon, Leonard A. Brennan, Fidel Hernández, Bart M. Ballard, Thomas V. Dailey
Habitat Space Used By Northern Bobwhites And Texas Tortoises On South Texas Rangelands, Ross O. Couvillon, Leonard A. Brennan, Fidel Hernández, Bart M. Ballard, Thomas V. Dailey
National Quail Symposium Proceedings
South Texas rangelands are increasingly managed for recreational hunting, particularly northern bobwhite (Colinus virgianus). Effects of habitat management for game species on non-game species are largely unknown. Large private ranches used for recreational hunting could also provide habitat for the threatened Texas tortoise (Gopherus berlandieri). We studied habitat use of Texas tortoises and northern bobwhites on a private ranch in South Texas that undergoes active habitat management. In 2015, tortoises (n = 12) and bobwhite hens (n = 42) were tracked during their active and breeding seasons, respectively, with radio-telemetry. Satellite images were analyzed …
Effects Of Tanglehead Expansion On Bobwhite Habitat Use In South Texas, John T. Edwards, Fidel Hernández, David B. Webster, Leonard A. Brennan, Chad J. Parent, Fred C. Bryant
Effects Of Tanglehead Expansion On Bobwhite Habitat Use In South Texas, John T. Edwards, Fidel Hernández, David B. Webster, Leonard A. Brennan, Chad J. Parent, Fred C. Bryant
National Quail Symposium Proceedings
Usable space for northern bobwhite (Colinus virginianus) has been reduced across a large portion of South Texas rangelands due to the spread of non-native, invasive grasses. A native grass, tanglehead (Heteropogon contortus) has rapidly expanded its dominance in the western Sand Sheet of South Texas within the last 10-15 years. It has formed high-density monocultures, similar to non-native grasses, which are associated with losses of forb and grass diversity as well as bare ground, which are key components of bobwhite habitat. The objectives of our research were to 1) determine selection-avoidance of habitat features by bobwhites, …
An Evaluation Of Northern Bobwhite Conservation Research: A Call For Large-Scale Studies, Lex J. Gomez, Kelly S. Reyna
An Evaluation Of Northern Bobwhite Conservation Research: A Call For Large-Scale Studies, Lex J. Gomez, Kelly S. Reyna
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) populations have declined throughout the species’ range since the 1960s. Habitat loss and degradation are thought to have largely contributed to this decline by reducing the amount of space and resources required to sustain viable quail populations. Previous studies have attempted to address this issue by focusing on ranch-level management of bobwhites instead of on the effectiveness of large-scale techniques. Here, we review current and historical studies that have facilitated the implementation of management techniques on multiple scales. In doing so, we will also reveal the shortcomings of such studies by highlighting their narrowed …
Long-Term Population Stability In The Greater Red Hills Region Amidst Range-Wide Declines: A Case For Integrated Management, Theron M. Terhune Ii, D. Clay Sisson, William E. Palmer, Shane D. Wellendorf
Long-Term Population Stability In The Greater Red Hills Region Amidst Range-Wide Declines: A Case For Integrated Management, Theron M. Terhune Ii, D. Clay Sisson, William E. Palmer, Shane D. Wellendorf
National Quail Symposium Proceedings
All natural habitats possess inherent conservation value, including the presence of rare or endemic species, provision of ecosystem services, historic landmarks, or resources harvested. Large-scale loss of natural habitats and deterioration of fire-mediated habitats has caused precipitous declines of native fauna and flora in the southeastern US. The role of private landholdings in wildlife and conservation is often underestimated, and consumptive use of wildlife is commonly viewed as counterproductive to sustainability. However, in the Greater Red Hills region (GRH) of north Florida and south Georgia, intentional management for northern bobwhite (Colinus virginianus) on private lands has not only …
The Role Of Joint Ventures In Northern Bobwhite Conservation, Stephen Demaso
The Role Of Joint Ventures In Northern Bobwhite Conservation, Stephen Demaso
National Quail Symposium Proceedings
Partnerships are crucial part of northern bobwhite (Colinus virginianus) conservation. A key principle is that no single entity can effectively address the complex landscape-level conservation issues to sustain populations and their supporting habitats in perpetuity. Joint Ventures (JVs) use a partnership based approach to deliver specific bird population and habitat objectives within their geography. Currently, 7 of the 12 JVs that occur in the North American bobwhite range have bobwhites listed as a priority species. This presentation will cover various topics including: 1) the history of JVs in North America; 2) an overview of the variety of models …
Predicting Northern Bobwhite Habitat In Semiarid Rangeland Using Landsat Imagery, Jeffrey G. Whitt, Kelly S. Reyna
Predicting Northern Bobwhite Habitat In Semiarid Rangeland Using Landsat Imagery, Jeffrey G. Whitt, Kelly S. Reyna
National Quail Symposium Proceedings
Multiple studies have attempted to model northern bobwhite (Colinus virginianus) distribution using classified remotely sensed imagery in combination with pattern recognition software. These models tend to be more accurate in humid subtropical regions. To identify bobwhite habitat in subhumid and semiarid rangeland, we performed our own classification on 4 LANDSAT scenes of Clay County, Texas, from July and December 2015. Stands of mature little bluestem (Schizachyrium scoparium) provide excellent bobwhite nesting cover and could be identified using LANDSAT imagery. Habitat was scored from 0 to 1.0 based on estimated range health, presence of little bluestem, and …
Temperature Assessment On A Reclaimed Surface Mine During Northern Bobwhite Breeding Season: Considerations For Habitat Management, Donald M. Yow, Jeremy P. Orange, John J. Morgan, Gary Sprandel, Danna L. Baxley, Eric Williams
Temperature Assessment On A Reclaimed Surface Mine During Northern Bobwhite Breeding Season: Considerations For Habitat Management, Donald M. Yow, Jeremy P. Orange, John J. Morgan, Gary Sprandel, Danna L. Baxley, Eric Williams
National Quail Symposium Proceedings
Ground-level air temperatures were assessed within 4 distinct habitat areas on a managed reclaimed surface mine at Peabody Wildlife Management Area, Kentucky, 26 June–17 July 2015, during the northern bobwhite (Colinus virginianus) brood season. Habitat consisted of disked and nondisked areas of native grass and an invasive species, sericea lespedeza (Lespedeza cuneata). Disked areas offered more open space for bobwhite mobility and experienced higher average temperatures than nondisked sites. Although statistically significant, differences in air temperature between disked and nondisked areas were likely too small to have practical implications for bobwhite habitat management in Kentucky under …
Temporal And Spatial Assessment Of Usable Space And Cover Type Interspersion For Northern Bobwhites On Private Farmlands In Southwestern Ohio, Robert J. Gates, Mark J. Wiley, Adam K. Janke, Marjorie R. Liberati
Temporal And Spatial Assessment Of Usable Space And Cover Type Interspersion For Northern Bobwhites On Private Farmlands In Southwestern Ohio, Robert J. Gates, Mark J. Wiley, Adam K. Janke, Marjorie R. Liberati
National Quail Symposium Proceedings
Contemporary landscape change driven by socio-economic forces and advances in agricultural technology do not favor northern bobwhites (Colinus virginianus) in the Midwestern United States. The challenge of bobwhite conservation is to provide sufficient quantities of habitat with optimal configurations in proportions that satisfy needs throughout the year on private-owned working lands. We radio-tracked 58 coveys and 98 individual birds throughout the year in 2009-10 and 2010-11 on privately owned farmland in southwestern Ohio. We investigated temporal changes in usable space from use-availability data. Estimated proportions of usable space based on analyses of habitat selection across four study sites …
Strategic Habitat Conservation For Declining Grassland Wildlife Populations In The Oaks And Prairies Joint Venture, James Giocomo, Johnathan Hayes, Kenneth Gee, Jeff Raasch, Robert Perez
Strategic Habitat Conservation For Declining Grassland Wildlife Populations In The Oaks And Prairies Joint Venture, James Giocomo, Johnathan Hayes, Kenneth Gee, Jeff Raasch, Robert Perez
National Quail Symposium Proceedings
Degradation and conversion of functioning grassland ecosystems in North America has driven significant declines in grassland wildlife populations across multiple taxa. In an effort to address declines in the grasslands of Oklahoma and Texas, a number of governmental agencies and Non-Governmental Organizations have partnered to form the Oaks and Prairies Joint Venture (OPJV) to more strategically and collaboratively deliver conservation actions in this region. With northern bobwhite (Colinus virginianus) as the flagship species, OPJV has worked to implement a fully integrated Strategic Habitat Conservation framework that works at multiple scales to conduct biological planning, landscape conservation design, habitat …
Effects Of Broad-Scale Conservation On Northern Bobwhite Populations In Agricultural Landscapes, John M. Yeiser, John J. Morgan, Danna L. Baxley, Richard B. Chandler, James A. Martin
Effects Of Broad-Scale Conservation On Northern Bobwhite Populations In Agricultural Landscapes, John M. Yeiser, John J. Morgan, Danna L. Baxley, Richard B. Chandler, James A. Martin
National Quail Symposium Proceedings
Private land initiatives such as the Conservation Reserve Enhancement Program (CREP) are avenues for broad-scale northern Bobwhite (Colinus virginianus) conservation. The CREP in Kentucky established 40,468 ha of native prairie grasses and riparian corridors in the Green River Basin. Northern bobwhite responses to similar conservation measures at local scales (i.e., the site of implementation) have been positive; however, the geographic extent of the influence of private land initiatives on populations is less understood. Our objectives were to investigate landscape-scale effects of CREP on northern bobwhite populations. Using a stratified random sampling design, 254 roadside point counts were performed …
Fall Quail Densities On Public Lands In Missouri: A Decade Of Monitoring, Beth Emmerich, Thomas V. Dailey
Fall Quail Densities On Public Lands In Missouri: A Decade Of Monitoring, Beth Emmerich, Thomas V. Dailey
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) fall population density has been determined annually since 2005 on 19 public land areas managed by the Missouri Department of Conservation (MDC). These demonstration areas, known as Quail Emphasis Areas (QEAs), were created as part of the MDC Strategic Guidance for Northern Bobwhite Recovery: 2003-2013. Management of QEA bobwhite populations, habitat and hunting has been evaluated periodically at the area, regional and statewide scale, and the program has been perpetuated in an updated 2014-2024 Strategic Guidance. QEAs were selected to represent MDC administrative regions and are highly variable in many aspects, e.g., size range …
Monitoring Northern Bobwhite Populations Reduces Uncertainty About Management Effectiveness: A Paradigm Of Empiricism And Hope, Adam W. Green, Dallas P. Grimes, Greg Hagan, Richard Hamrick, Craig Harper, Patrick Keyser, John J. Morgan, I. B. Parnell, Reggie Thackston, Theron M. Terhune Ii, James A. Martin
Monitoring Northern Bobwhite Populations Reduces Uncertainty About Management Effectiveness: A Paradigm Of Empiricism And Hope, Adam W. Green, Dallas P. Grimes, Greg Hagan, Richard Hamrick, Craig Harper, Patrick Keyser, John J. Morgan, I. B. Parnell, Reggie Thackston, Theron M. Terhune Ii, James A. Martin
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) populations have been declining across their range for decades because of habitat loss, degradation, and fragmentation. Habitat restoration and management—sometimes coupled with other cultural practices—has long been the paradigm for bobwhite conservation. However, the lack of peer-reviewed empirical evidence supporting the success of active management to increase bobwhite density and growth rates has created skepticism and uncertainty among some conservationists and user groups. Thus, our objectives were to test the basic prediction that active management can increase bobwhite populations across a large spatial extent and highlight the importance of population monitoring to refine management …
Response Of Northern Bobwhites To Habitat Improvement On Private Lands In The Rolling Plains Of Texas, C. Brad Dabbert, Robin Verble-Pearson
Response Of Northern Bobwhites To Habitat Improvement On Private Lands In The Rolling Plains Of Texas, C. Brad Dabbert, Robin Verble-Pearson
National Quail Symposium Proceedings
Northern bobwhites (Colinus virginianus) in the Rolling Plains of Texas have experienced significant declines in recent years. Examination of the Texas Parks and Wildlife Department Quail Roadside Counts reveals a steep decline since 2007 in the Rolling Plains of Texas. Biologists only detected 2.91 birds/counting route in 2013. This number marked 2 years in a row of record lows (counts started in 1978) below the long-term mean of 19.7 birds/route (Texas Parks and Wildlife 2015). These numbers are not surprising given the historically damaging drought Texas has suffered. Texas Parks and Wildlife Department counts improved to 7.5 bobwhites/counting …
Population Response Of Three Quail Species To Habitat Restoration In South Texas, Eric D. Grahmann, Fidel Hernández, Leonard A. Brennan, Timothy E. Fulbright, Carter Crouch, Michael W. Hehman, David Heft, Robert Perez, Fred C. Bryant
Population Response Of Three Quail Species To Habitat Restoration In South Texas, Eric D. Grahmann, Fidel Hernández, Leonard A. Brennan, Timothy E. Fulbright, Carter Crouch, Michael W. Hehman, David Heft, Robert Perez, Fred C. Bryant
National Quail Symposium Proceedings
Maintaining and increasing usable space is paramount for maintaining and increasing wild quail. Aside from weather and other factors that can temporarily reduce densities, range-wide, no factor has as much influence on quail populations as the amount of habitat present across the landscape. In the field of quail management, ‘‘bad news’’ is the norm, as many articles begin by explaining how a select species has declined. Here we provide good news and use 4 empirical examples of population increases for 3 quail species following creation of usable space and restoration of patch connectivity. From 2008–2014, a suite of independent projects …
Progress Of The National Bobwhite Conservation Initiative, Donald F. Mckenzie, John J. Morgan, Thomas V. Dailey
Progress Of The National Bobwhite Conservation Initiative, Donald F. Mckenzie, John J. Morgan, Thomas V. Dailey
National Quail Symposium Proceedings
Northern bobwhites (Colinus virginianus) have declined precipitously over 5 decades because of a decline in habitat, largely a result of agricultural intensification and inadequate management of natural plant succession. In response, quail biologists developed strategic and operational plans, and formed a national partnership of state and federal agencies, bobwhite institutions, non-government organizations, universities and private citizens. The early history of these efforts was reviewed in 2006 at the Sixth National Quail Symposium. Over the past 10 years, exponential growth occurred, including establishment of a home for national bobwhite conservation at the University of Tennessee, and funding from the …
A Focused Habitat Approach For Northern Bobwhite Restoration In Kentucky, John J. Morgan, John M. Yeiser, Danna L. Baxley, Gary Sprandel, Ben A. Robinson, Keith Wethington
A Focused Habitat Approach For Northern Bobwhite Restoration In Kentucky, John J. Morgan, John M. Yeiser, Danna L. Baxley, Gary Sprandel, Ben A. Robinson, Keith Wethington
National Quail Symposium Proceedings
The Kentucky Department of Fish and Wildlife Resources has measured northern bobwhite (Colinus virginianus) population trends since 1960. During that span, northern bobwhite steadily declined because clean agriculture, fescue-sod, plant succession, and development eroded habitat suitability. Multiple efforts have failed with regard to restoring northern bobwhite numbers. Over 3.5 million northern bobwhite were released by the Department over a three decade period. Habitat efforts on private lands were deployed for over 20 years with mixed results. Support for the habitat restoration efforts waned. In 2008, the Department unveiled a new strategy centered on restoring concentrated habitat in focal …
Translocation As A Population Restoration Technique For Northern Bobwhites: A Review And Synthesis, James A. Martin, Roger D. Applegate, Thomas V. Dailey, Michelle Downey, Beth Emmerich, Fidel Hernández, Mark M. Mcconnell, Kelly S. Reyna, Dale Rollins, Rebekah E. Ruzicka, Theron M. Terhune Ii
Translocation As A Population Restoration Technique For Northern Bobwhites: A Review And Synthesis, James A. Martin, Roger D. Applegate, Thomas V. Dailey, Michelle Downey, Beth Emmerich, Fidel Hernández, Mark M. Mcconnell, Kelly S. Reyna, Dale Rollins, Rebekah E. Ruzicka, Theron M. Terhune Ii
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) abundance has declined precipitously for decades across much of the species range, to the point of widespread local, regional, and statewide extirpation. Because of successful translocations of other gallinaceous birds, bobwhite enthusiasts increasingly call for use of the approach. Consequently, the National Bobwhite Technical Committee (NBTC), on behalf of state agencies, requested a review and recommendation by the NBTC Science Subcommittee. Thus, our paper is co-authored by invited experts and includes reviews of peer-reviewed publications, manuscripts in these proceedings, state agency reports, experience by co-authors, and a survey of perspectives on translocations by state …
Northern Bobwhite Nest Site Selection In Field Borders, Danielle J. Berger, Jessica N. Piispanen, Tim F. Ginnett, Jason D. Riddle
Northern Bobwhite Nest Site Selection In Field Borders, Danielle J. Berger, Jessica N. Piispanen, Tim F. Ginnett, Jason D. Riddle
School of Natural Resources: Faculty Publications
No abstract provided.
Landscape Features Affecting Northern Bobwhite Predator-Specific Nest Failures In Southeastern Usa, Susan Ellis-Felege, Shannon E. Albeke, Nathan P. Nibbelink, Michael J. Conroy, D. Clay Sisson, William E. Palmer, John P. Carroll
Landscape Features Affecting Northern Bobwhite Predator-Specific Nest Failures In Southeastern Usa, Susan Ellis-Felege, Shannon E. Albeke, Nathan P. Nibbelink, Michael J. Conroy, D. Clay Sisson, William E. Palmer, John P. Carroll
School of Natural Resources: Faculty Publications
Nest predation is a critical component in avian productivity and typically is the leading cause of nest failure for most birds. Several landscape features are thought to drive the behavioral interaction between northern bobwhite (Colinus virginianus; e.g., nest placement) and their predators (e.g., search methods for food acquisition). In order to understand habitat characteristics influencing predation, we studied bobwhite nests using 24-hour near-infrared video cameras. We monitored 675 bobwhite nests with cameras on 3 properties in northern Florida and southern Georgia, USA, during 2000–2006. To test the association between nest failures and specific failure causes with landscape structure, we calculated …
Landscape Features Affecting Northern Bobwhite Predator-Specific Nest Failures In Southeastern Usa, Susan N. Ellis-Felege, Shannon E. Albeke, Nathan P. Nibbelink, Michael J. Conroy, Clay Sisson, William E. Palmer, John P. Carroll
Landscape Features Affecting Northern Bobwhite Predator-Specific Nest Failures In Southeastern Usa, Susan N. Ellis-Felege, Shannon E. Albeke, Nathan P. Nibbelink, Michael J. Conroy, Clay Sisson, William E. Palmer, John P. Carroll
Biology Faculty Publications
Nest predation is a critical component in avian productivity and typically is the leading cause of nest failure for most birds. Several landscape features are thought to drive the behavioral interaction between northern bobwhite (Colinus virginianus; e.g., nest placement) and their predators (e.g., search methods for food acquisition). In order to understand habitat characteristics influencing predation, we studied bobwhite nests using 24-hour near-infrared video cameras. We monitored 675 bobwhite nests with cameras on 3 properties in northern Florida and southern Georgia, USA, during 2000–2006. To test the association between nest failures and specific failure causes with landscape structure, we calculated …
Aspects Of Northern Bobwhite Ecology On South Florida Rangeland., J. A. Martin, W. E. Palmer, Carroll J. P.
Aspects Of Northern Bobwhite Ecology On South Florida Rangeland., J. A. Martin, W. E. Palmer, Carroll J. P.
School of Natural Resources: Faculty Publications
Abstract During 2004 and 2005, we monitored breeding season survival, home range, habitat use, density, and reproduction of northern bobwhite (Colinus virginianus) in the peninsular region of Florida, USA. We radio-tagged 81 birds across a 20-km2 cattle ranch consisting predominately of rotationally grazed pastureland. Birds were radio-tracked three to five times per week until mortality or the transition to nonbreeding season. We found no difference in home range size among the sexes, ages, or their interaction. Mean home range size pooled for years, sexes, and age class was 56.28 ha (±7.87 SE). Home ranges of bobwhites were not distributed among …
Statistical Indicators And State–Space Population Models Predict Extinction In A Population Of Bobwhite Quail, Trevor Hefley, Andrew J. Tyre, Erin E. Blankenship
Statistical Indicators And State–Space Population Models Predict Extinction In A Population Of Bobwhite Quail, Trevor Hefley, Andrew J. Tyre, Erin E. Blankenship
School of Natural Resources: Faculty Publications
Early warning systems of extinction thresholds have been developed for and tested in microcosm experiments, but have not been applied to populations of wild animals. We used state–space population models and a statistical indicator to detect a transcritical bifurcation extinction threshold in a population of bobwhite quail (Colinus virginianus) located in an agricultural region experiencing habitat deterioration and loss. The extinction threshold was detectible using two independent data sets. We compared predictions from state–space population models to predictions from a statistical indicator and found that predictions were corroborated. Using state–space population models, we estimated that our study population …
Translocation To A Fragmented Landscape: Survival, Movement, And Site Fidelity Of Northern Bobwhites, Theron M. Terhune, D. Clay Sisson, William E. Palmer, Brant C. Faircloth, H. Lee Stribling, John P. Carroll
Translocation To A Fragmented Landscape: Survival, Movement, And Site Fidelity Of Northern Bobwhites, Theron M. Terhune, D. Clay Sisson, William E. Palmer, Brant C. Faircloth, H. Lee Stribling, John P. Carroll
School of Natural Resources: Faculty Publications
Habitat fragmentation, degradation, and loss have taxed early-successional species including the Northern Bobwhite (Colinus virginianus) and numerous grassland obligate birds. Translocation is often applied to counteract the consequences of habitat fragmentation through the creation, reestablishment, or augmentation of wild populations for the purposes of conservation, biodiversity maintenance. However, the implementation of these techniques is often conducted without valid experimental designs and therefore lacks robust, empirical data needed to evaluate and advance the knowledge and application of translocation. Despite the increasing amount of habitat management applied to patches among fragmented landscapes, a paucity of source populations often limits natural …