Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 30 of 36
Full-Text Articles in Entire DC Network
Survival And Nesting Ecology Of Scaled Quail In The Trans-Pecos, Texas, Carlos E. Gonzalez Gonzalez, Louis A. Harveson, Ryan S. Luna
Survival And Nesting Ecology Of Scaled Quail In The Trans-Pecos, Texas, Carlos E. Gonzalez Gonzalez, Louis A. Harveson, Ryan S. Luna
National Quail Symposium Proceedings
Scaled quail (Callipepla squamata) are one of the most ecologically and economically important wildlife species in the Trans-Pecos, because they are the primary upland game bird in the Chihuahuan Desert. Using radiotelemetry, we evaluated survival (Kaplan–Meier) and nesting success of quail on 3 study sites in the Trans-Pecos, Texas: one (Santiago Mountain Ranch, central Brewster Co.) was supplemented with milo (Sorghum bicolor) year-round, the second (Lado Ranch, south Culberson Co.) never used supplements, and the third (Apache Ranch, central Culberson Co.) was supplemented with quail blocks. We trapped and radiocollared 164 female quail collectively across all …
Efficacy Of A Soft Release Strategy For Translocating Scaled Quail In The Rolling Plains Of Texas, Rebekah E. Ruzicka, Kara B. Campbell, Michelle C. Downey, Dale Rollins, Bradley Kubečka, Matthew Poole, Donald C. Ruthven
Efficacy Of A Soft Release Strategy For Translocating Scaled Quail In The Rolling Plains Of Texas, Rebekah E. Ruzicka, Kara B. Campbell, Michelle C. Downey, Dale Rollins, Bradley Kubečka, Matthew Poole, Donald C. Ruthven
National Quail Symposium Proceedings
Scaled Quail (Callipepla squamata) populations have become locally extinct and spatially fragmented in the Rolling Plains ecoregion of Texas. Translocating Scaled Quail from core to declining populations could augment populations or re-establishing extinct populations. Although translocations of scaled quail have been attempted in Texas, none have been documented and none have attempted to identify best practices. Release strategy (i.e., hard or soft release) is a factor that can influence the success of a translocation. Our objective was to compare daily apparent survival of scaled quail translocated to the Rolling Plains between 2 release treatment groups: hard- and soft-release. …
Effects Of Source Population And Release Strategy On Survival And Dispersal Of Translocated Scaled Quail In The Rolling Plains Of Texas—A Preliminary Report, Rebekah E. Ruzicka, Dale Rollins
Effects Of Source Population And Release Strategy On Survival And Dispersal Of Translocated Scaled Quail In The Rolling Plains Of Texas—A Preliminary Report, Rebekah E. Ruzicka, Dale Rollins
National Quail Symposium Proceedings
Scaled quail (Callipepla squamata) have declined 3.5% annually in Texas from 1966-2013, but declines have not been uniform across the state. The Rolling Plains Ecoregion has experienced a 6.8% decrease during this period, while the western Edwards Plateau has remained stable. Habitat loss that has contributed to scaled quail decline also inhibits recolonization. Translocation has become an increasingly popular tool to reestablish populations for recreational or conservational purposes. Overall success rate of translocations is low and has prompted research into factors that contribute to the establishment of a self-sustaining population. Source population and release strategy are two translocation …
Survival Demographics Of Montezuma Quail In Southeast Arizona, Pedro M. Chavarria, Nova J. Silvy, Roel R. Lopez, Donald S. Davis, Angel Montoya
Survival Demographics Of Montezuma Quail In Southeast Arizona, Pedro M. Chavarria, Nova J. Silvy, Roel R. Lopez, Donald S. Davis, Angel Montoya
National Quail Symposium Proceedings
Many facets of Montezuma quail (Cyrtonyx montezumae mearnsi) population dynamics, such as survival and causes of mortality, are unknown because of limited or lack of mark–recapture studies on wild populations of this species. Much of what is known about this species comes from casual observations in the field or from dog-assisted flush-count surveys. Further insight into rate and causes of mortality for this species is necessary to ensure proper conservation measures. We evaluated survival and causes of mortality of Montezuma quail in southeastern Arizona from winter 2007 to spring 2010. Survival was determined from quail captured, radiotagged, and …
Effect Of Field Trials On Northern Bobwhite Survival And Hunt Quality On Dixie Plantation, D. Clay Sisson, Theron M. Terhune Ii
Effect Of Field Trials On Northern Bobwhite Survival And Hunt Quality On Dixie Plantation, D. Clay Sisson, Theron M. Terhune Ii
National Quail Symposium Proceedings
The potential negative effects of horseback field trials on survival and post trial hunting quality of northern bobwhites (Colinus virginianus) have long been debated. Recent acquisition of Dixie Plantation (3,650 ha) by Tall Timbers Research Station provided a unique opportunity to evaluate this interaction as Dixie has been home to the Continental Field Trial since 1937. We monitored radio-tagged bobwhites annually (n = 183; ~20 coveys during fall/winter) on a core study area (640 ha) upon which a portion of the field trial was conducted during January 2015 & 2016. We estimated Kaplan-Meier survival of radio-tagged bobwhites …
Estimates Of Northern Bobwhite Neonate Survival, Theron M. Terhune Ii, Richard B. Chandler, James A. Martin
Estimates Of Northern Bobwhite Neonate Survival, Theron M. Terhune Ii, Richard B. Chandler, James A. Martin
National Quail Symposium Proceedings
Neonate survival is an important but poorly understood component of northern bobwhite (Colinus virginianus) population dynamics. We used a combination of thermal imagery (forward-looking infrared [FLIR]) and radio-telemetry to estimate survival from time of hatch to fall recruitment. During 2013 – 2015, we tracked bobwhites and captured broods at ~11 days of age using the corral technique. In addition to patagial tagging each neonate captured, we sutured radio-tags (0.76 g) on a subset of neonates (n = 56), and located them 3-4 times daily using radio-telemetry to determine fate and cause of mortality. We modified the Dail-Madsen …
Breeding Season Survival And Nesting Of Northern Bobwhite On Native Prairie Versus Traditionally Managed Conservation Areas In Southwestern Missouri, Thomas R. Thompson, Frank L. Loncarich, R. Kyle Hedges
Breeding Season Survival And Nesting Of Northern Bobwhite On Native Prairie Versus Traditionally Managed Conservation Areas In Southwestern Missouri, Thomas R. Thompson, Frank L. Loncarich, R. Kyle Hedges
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) management on Missouri Conservation Area lands has traditionally focused on providing an interspersion of grass, crop, old field and woody cover to enhance edge habitat often juxtaposed with disked idle areas and food plots. This traditional approach, or the Intensive Management Model (IMM), is often implemented with the goal of providing all essential habitat components within a 40-acre area. While this model can produce useable quail habitat in agriculture-dominated landscapes it may not be the most effective or efficient approach to producing quail in grassland-dominated landscapes found in southwest Missouri. Conservation area mangers for …
Winter Survival And Habitat Selection By Translocated Northern Bobwhite In The New Jersey Pine Barrens: Preliminary Results, Kaili R. Stevens, Philip M. Coppola, Christopher K. Williams, Theron M. Terhune Ii, John P. Parke, John Cecil
Winter Survival And Habitat Selection By Translocated Northern Bobwhite In The New Jersey Pine Barrens: Preliminary Results, Kaili R. Stevens, Philip M. Coppola, Christopher K. Williams, Theron M. Terhune Ii, John P. Parke, John Cecil
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) populations have been experiencing precipitous range-wide declines for more than 50 years; some of the steepest declines occurring in the Mid-Atlantic states. These declines are largely attributed to habitat deterioration from urban sprawl, change in forest management, and intensive farming. This ongoing study aims to evaluate the efficacy of translocating wild bobwhites into the New Jersey Pine Barrens as a means to restore their historic populations. Translocation has proven relatively successful in augmenting bobwhite populations in other regions as well as restoring populations of gallinaceous species. This portion of the study aims to investigate …
Summer Survival Of Translocated Northern Bobwhite In The New Jersey Pine Barrens: Preliminary Results, Philip M. Coppola, Kaili R. Stevens, Christopher K. Williams, Theron M. Terhune Ii, John P. Parke, John Cecil
Summer Survival Of Translocated Northern Bobwhite In The New Jersey Pine Barrens: Preliminary Results, Philip M. Coppola, Kaili R. Stevens, Christopher K. Williams, Theron M. Terhune Ii, John P. Parke, John Cecil
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) have declined precipitously since the 1960s, largely due to habitat deterioration and changes in land use; some of the highest declines have been observed in the Mid-Atlantic States. In other regions, attempts to augment bobwhite populations have been relatively successful using translocation. As part of a long-term restocking program, focal areas for translocation in the mid-Atlantic region were identified by biologists at a National Bobwhite Conservation Initiative (NBCI) workshop. The objective of this project is to evaluate translocation to restore bobwhite populations in the New Jersey Pine Barrens, a focal area designated with a …
Testing Northern Bobwhite Reintroduction Techniques In The Northern Edge Of Their Range, William Macaluso, Christopher K. Williams, Theron M. Terhune Ii
Testing Northern Bobwhite Reintroduction Techniques In The Northern Edge Of Their Range, William Macaluso, Christopher K. Williams, Theron M. Terhune Ii
National Quail Symposium Proceedings
Pen-rearing young frequently fails as a reintroduction technique in game birds because of low postrelease survival rates in the wild. This may be caused by a combination of poor genetics from domestication, unhealthy birds, birds that do not exhibit wild behavior, or birds that are unfamiliar with their surroundings after hard releases. Recent research suggests that parent-rearing, involving pre- and posthatch imprinting of wild-strain northern bobwhite (Colinus virginianus) chicks by adults, may be a viable option for restoring populations. Imprinting potentially causes reintroduced birds to exhibit more natural behavior. We tested this method against a slightly modified traditional …
Annual Variation In Northern Bobwhite Survival And Raptor Migration, R. Douglas Holt, L. Wes Burger Jr., Bruce D. Leopold, K. David Godwin
Annual Variation In Northern Bobwhite Survival And Raptor Migration, R. Douglas Holt, L. Wes Burger Jr., Bruce D. Leopold, K. David Godwin
National Quail Symposium Proceedings
We estimated survival of radio-marked northern bobwhite (Colinus virginianus) on a managed prairie site in northeast Mississippi during 2 disparate winters (15 Sep-14 Apr 2000–2002). We retrospectively examined factors that may influence bobwhite survival. Pooled survival rates differed substantially between years (S 1⁄4 0.03 6 0.02 in 2000–2001 and S 1⁄4 0.36 6 0.16 in 2001–2002). Regional relative abundance of 3 species of raptors thought to be important predators of bobwhite was greater during 2000 compared to 2001 based on kriging of Christmas Bird Count (CBC) data. We demonstrate an approach for characterizing annual variation in spatial distribution of migratory …
Efficacy Of Targeted Mist-Netting To Capture Northern Bobwhites During The Non-Breeding Season In Ohio, Mark J. Wiley, Adam K. Janke, Robert J. Gates
Efficacy Of Targeted Mist-Netting To Capture Northern Bobwhites During The Non-Breeding Season In Ohio, Mark J. Wiley, Adam K. Janke, Robert J. Gates
National Quail Symposium Proceedings
Baited funnel traps and nightlighting are well established northern bobwhite (Colinus virginianus) capture techniques, but their use is not always appropriate, particularly on private land where cooperating landowners may place constraints on research activities. Alternative capture techniques may be more effective under conditions considered to be unfavorable for established techniques (e.g., periods with abundant natural food). Targeted mist-netting, where mist nets are erected near the known location of specific individuals, has been used to capture gallinaceous species and may be an effective alternative to established bobwhite capture techniques. We evaluated the effectiveness of using targeted mist-netting to capture bobwhites during …
Northern Bobwhite Age Ratios And Productivity At The Individual Property Scale In South Texas, Joseph P. Sands, Andrew N. Tri, Leonard A. Brennan, Fidel Hernandez, Stephen J. Demaso, Robert M. Perez
Northern Bobwhite Age Ratios And Productivity At The Individual Property Scale In South Texas, Joseph P. Sands, Andrew N. Tri, Leonard A. Brennan, Fidel Hernandez, Stephen J. Demaso, Robert M. Perez
National Quail Symposium Proceedings
Annual adult survival rate (Sˆ) and finite rate of population growth (k) are critical parameters that must be considered when subjecting a species to annual harvest. We used a data set of 148 estimates of northern bobwhite (Colinus virginianus) juvenile: adult age ratios (R) derived from hunter-harvested wings in the South Texas Plains to estimate these parameters. Data were collected from 1940 to 1976 and from 1983 to 2008. We used adjusted estimates of R to account for higher harvest vulnerability of juveniles, and the regional estimate of Sˆ (30.6% based on a stable population) to calculate estimates of k …
Northern Bobwhite Survival Related To Movement On A Reclaimed Surface Coal Mine, Ashley M. Unger, Evan P. Tanner, Craig A. Harper, Patrick D. Keyser, John J. Morgan
Northern Bobwhite Survival Related To Movement On A Reclaimed Surface Coal Mine, Ashley M. Unger, Evan P. Tanner, Craig A. Harper, Patrick D. Keyser, John J. Morgan
National Quail Symposium Proceedings
Reclaimed coal mines represent opportunity to provide large tracts of early succession habitat essential to northern bobwhite (Colinus virginianus) populations. However, little research has been conducted to explore the potential of reclaimed mine sites and examine bobwhite ecology on these unique areas. Reclaimed mines in Kentucky were planted to non-native species, such as sericea lespedeza (Lespedeza cuneata) and tall fescue (Festuca arundinacea), which do not provide suitable structure for northern bobwhite brood-rearing and movement. Fallow disking (in blocks and linear firebreaks) and planting food plots are part of current management efforts to improve food availability and habitat structure for broods. …
Temporal Variability In Survival Of Non-Breeding Northern Bobwhites In Ohio, Adam K. Janke, Robert J. Gates
Temporal Variability In Survival Of Non-Breeding Northern Bobwhites In Ohio, Adam K. Janke, Robert J. Gates
National Quail Symposium Proceedings
Non-breeding season survival is an important determinant of population growth rates of northern bobwhites (Colinus virginianus) and is primarily influenced by hunter harvest, predation, and weather. The collective influence of these factors varies within and among years and across the bobwhite range. Understanding factors that influence variation in survival is important to inform regionally-specific management strategies for declining bobwhite populations. We radiomarked 311 bobwhites from 73 coveys to investigate temporal variation in non-breeding season (Oct-Mar) survival of a declining bobwhite population on private land in southwestern Ohio during 2008–2011. We used the data bootstrapping feature in Program MARK to adjust …
Demographic Analysis Of A Declining Northern Bobwhite Population In Southwestern Ohio, Robert J. Gates, Adam K. Janke, Marjorie R. Liberati, Mark J. Wiley
Demographic Analysis Of A Declining Northern Bobwhite Population In Southwestern Ohio, Robert J. Gates, Adam K. Janke, Marjorie R. Liberati, Mark J. Wiley
National Quail Symposium Proceedings
Northern bobwhite (Colinus virginianus) populations continue to decline throughout much of their range, especially in the Midwestern United States. Land use and habitat changes are understood to be the primary cause of decline, and it is unclear how vital rates affect growth of regional populations. We estimated relative abundance and population vital rates of bobwhites on 8 private land sites in southwestern Ohio during 2008–2011. Life stage simulation analyses were used to model the influence of 9 demographic parameters on population growth rates (k). All but one vital rate, chick survival, were modeled with empirical data randomly selected from normal …
A Mid-Atlantic And A National Population Model Of Northern Bobwhite Demographic Sensitivity, Christopher K. Williams, Brett K. Sandercock, Michael Lohr, Paul M. Castelli
A Mid-Atlantic And A National Population Model Of Northern Bobwhite Demographic Sensitivity, Christopher K. Williams, Brett K. Sandercock, Michael Lohr, Paul M. Castelli
National Quail Symposium Proceedings
Numerous field studies have estimated fecundity and survival rates for northern bobwhites (Colinus virginianus), but a synthetic population model based on life-stage simulation analysis (LSA) was only recently developed to examine demographic sensitivity of the finite rate of population change. We compare local demographic parameters of bobwhite versus a national compilation to identify limiting demographic factors for improved regional habitat planning and management. The national compilation provided a useful overview but combined parameters across populations at different latitudes and under different management regimes. We parameterized our LSA model to examine the sensitivity of the finite rate of growth (k) to …
Survival And Reproduction Of Parent-Reared Northern Bobwhites, William E. Palmer, Randy D. Cass, Shane D. Wellendorf, Jerald F. Sholar, Theron M. Terhune, John P. Carroll
Survival And Reproduction Of Parent-Reared Northern Bobwhites, William E. Palmer, Randy D. Cass, Shane D. Wellendorf, Jerald F. Sholar, Theron M. Terhune, John P. Carroll
National Quail Symposium Proceedings
Captive-reared and released game birds typically have low reproductive success in the wild which limits their use for restoration of game bird populations. A fundamental problem with captive-rearing techniques is the absence of a mechanism for imprinting. We developed a parent-rearing technique that facilitates pre- and post-hatch imprinting using parent-reared wild strain northern bobwhite (Colinus virginianus) chicks in outdoor pens. Parent-reared chicks were marked with patagial wing tags and recaptured during October and the following March. We radiomarked juveniles captured in March to monitor survival and reproductive success in two separate studies, one in Georgia, and one in South Carolina, …
Additional Evidence Against Radio-Handicapping Of Northern Bobwhites, D. Clay Sisson, Theron M. Terhune, H. Lee Stribling
Additional Evidence Against Radio-Handicapping Of Northern Bobwhites, D. Clay Sisson, Theron M. Terhune, H. Lee Stribling
National Quail Symposium Proceedings
The validity of radio-telemetry to produce reliable information (e.g., survival estimates) has recently been challenged. Radio-telemetry is a widely used technique in studies of numerous species, therefore, concerns regarding potential bias in these estimates warrant further investigation. As such, and as part of a larger study, we investigated 3 aspects of potential radio-bias: 1) variation in survival distributions among treatment (newly radio-tagged) and control (previously radio-tagged) groups; 2) proportion of trapped animals censored during the traditional 7-day censor period; and 3) ramifications to cause-specific mortality through estimation of harvest rate. Kaplan-Meier survival, based on 30-day post trapping, was similar between …
Survival And Causes Of Mortality For Northern Bobwhites In The Southeastern Usa, D. Clay Sisson, Theron M. Terhune, H. Lee Stribling, Jerald F. Sholar, Steven D. Mitchell
Survival And Causes Of Mortality For Northern Bobwhites In The Southeastern Usa, D. Clay Sisson, Theron M. Terhune, H. Lee Stribling, Jerald F. Sholar, Steven D. Mitchell
National Quail Symposium Proceedings
Long-term studies are imperative to increase our knowledge of northern bobwhite (Colinus virginianus; hereafter bobwhite) demographics. During 1992-2005, we determined survival and cause-specific mortality of bobwhites on 10 study areas in southern Georgia and eastern Alabama, USA.We radio-tagged 7,105 bobwhites and determined 49 annual (Oct-Sep) and 110 seasonal survival estimates to examine spatial and temporal variation in survival. Annual survival for all sites and years combined averaged 0.196 (SE = 0.011) and ranged from 0.08 to 0.40. Over-winter (Oct - Mar) seasonal survival estimates (n = 51) averaged 0.541 (SE = 0.019) and ranged between 0.25 and 0.82, while breeding …
Survival Of Female Scaled Quail During The Breeding Season At Three Sites In The Chihuahuan Desert, Dale Rollins, Ben D. Taylor, Troy D. Sparks, Robert J. Buntyn, Scott E. Lerich, Louis A. Harveson, Tom E. Wadell, Cody B. Scott
Survival Of Female Scaled Quail During The Breeding Season At Three Sites In The Chihuahuan Desert, Dale Rollins, Ben D. Taylor, Troy D. Sparks, Robert J. Buntyn, Scott E. Lerich, Louis A. Harveson, Tom E. Wadell, Cody B. Scott
National Quail Symposium Proceedings
Scaled quail (Callipepla squamata) populations declined markedly across much of their range from 1988-2004, however little research has been conducted to investigate possible causes for the decline. As part of a larger study on scaled quail ecology and management, and in an attempt to determine whether breeding season survival could be implicated in this decline, we monitored survival of radiotagged female scaled quail during the breeding season at sites in Brewster and Pecos counties, Texas, and Sierra County, New Mexico, USA during 1999-2003. Survival rates were calculated using Kaplan Meier analysis for birds living >7 days post capture. Interval survival …
Over-Winter Survival Of Northern Bobwhite In Relation To Landscape Composition And Structure, R. Douglass Holt, Loren W. Burger Jr., Bruce D. Leopold, Dave Godwin
Over-Winter Survival Of Northern Bobwhite In Relation To Landscape Composition And Structure, R. Douglass Holt, Loren W. Burger Jr., Bruce D. Leopold, Dave Godwin
National Quail Symposium Proceedings
The conceptualization of security of bobwhite during winter has been predicated on the assumption that winter ranges differ in quality, based on habitat structure, composition, or interspersion. Although some studies have qualitatively related habitat composition to survival, no studies have quantitatively linked habitat or landscape characteristics to winter survival and the specific structural or compositional characteristics that influence quality are unknown. To quantify winter habitat quality, we modeled hazards as a function of habitat characteristics in relation to winter survival of radio-marked bobwhite (2000, n = 118 in 16 coveys; 2001, n = 49 in 7 coveys) in a managed …
Fate And Survival Of Radio-Marked Montezuma Quail, Froylan Hernandez, Eric Garza, Louis A.H. Harveson, Clay E. Brewer
Fate And Survival Of Radio-Marked Montezuma Quail, Froylan Hernandez, Eric Garza, Louis A.H. Harveson, Clay E. Brewer
National Quail Symposium Proceedings
Montezuma quail (Cyrtonyx montezumae) represent one of the least studied North American quail species, particularly in Texas. This lack of information may be partly due to their secretive nature and difficulty of capturing. We provide the first published report of fate of radio-marked Montezuma quail in Texas. We captured, radio-marked, and released 14 Montezuma quail on Elephant Mountain (n = 9) and Davis Mountain Preserve (n = 5) during 2000-2005. We used 2 methods of attachment for pendant style neck-loop radio transmitters. Body-loop transmitters were affixed to quail captured at the Davis Mountain Preserve whereas both body-loop and neck-loop were …
How To Re-Introduce Gray Partridges - Conclusions From A Releasing Project In Switzerland, Francis Buner
How To Re-Introduce Gray Partridges - Conclusions From A Releasing Project In Switzerland, Francis Buner
National Quail Symposium Proceedings
Once a widespread farmland bird in Switzerland, the Gray Partridge (Perdix perdix) has declined drastically since the 1960’s as a result of agricultural intensification and changes in predator abundance. In 1991 the wild population had dropped to ≈ 17 pairs only. We initiated a reintroduction experiment of Gray Partridge to investigate its feasibility for conservation of the species in Switzerland. Between 1998 and 2001 we released 145 partridges in the Swiss Klettgau, an intensively cultivated area from which the species had become extinct in 1993, but had since been ecologically enhanced with wild-flower strips and hedges up to 5.8% of …
Effects Of Two Burn Scales On Northern Bobwhite Demographic Parameters And Home Range Size, Shane D. Wellendorf, William E. Palmer
Effects Of Two Burn Scales On Northern Bobwhite Demographic Parameters And Home Range Size, Shane D. Wellendorf, William E. Palmer
National Quail Symposium Proceedings
Properties managed for bobwhite hunting in the Red Hills region use prescribed fire to burn 40-60% of their upland areas annually. Burning large areas could negatively affect bobwhite survival by increasing predation risk. Burning small areas could influence daily habitat use patterns and may influence nesting or brooding processes. Research on how the scale of management influences home range size and demographics of bobwhites is lacking. Therefore, on Tall Timbers Research Station (TTRS) we established 4-140 ha experimental treatment areas and randomly assigned 2 areas to be burned at a small scale (~2.25 ha burn patch size) and 2 areas …
Northern Bobwhite Demographic And Population Response Following An Intensive Habitat Modification To An Agricultural Landscape, Theron M. Terhune, D. Clay Sisson, Steven Mitchell, H. Lee Stribling
Northern Bobwhite Demographic And Population Response Following An Intensive Habitat Modification To An Agricultural Landscape, Theron M. Terhune, D. Clay Sisson, Steven Mitchell, H. Lee Stribling
National Quail Symposium Proceedings
Northern Bobwhite (Colinus virginianus) populations have been declining throughout most of their endemic range due to numerous factors (e.g., increased urbanization, predators); however, changing land-use practices have proved most detrimental to bobwhites. In parts of the southeastern USA, small-scale farming has been replaced by large-scale center-pivot irrigated fields and this has exacerbated habitat loss. Despite these trends, bobwhite populations in the Southeast have remained stable or increased on many areas employing intensive habitat management regimes, substantiating the importance of appropriate habitat management for long-term bobwhite persistence. In effort to reverse one such decline, we intensively modified a center-pivot, agriculture dominated …
Habitat Use And Survival Of Gray Partridge Pairs In Bavaria, Germany, Wolfgang Kaiser, Ilse Storch, John P. Carroll
Habitat Use And Survival Of Gray Partridge Pairs In Bavaria, Germany, Wolfgang Kaiser, Ilse Storch, John P. Carroll
National Quail Symposium Proceedings
Gray partridge (Perdix perdix) habitat studies have been undertaken in a number of countries but have generally focused on winter and brood rearing. We monitored survival of grey partridge pairs relative to habitat during the breeding season. Our study area was located near Feuchtwangen in north-west Bavaria, Germany. During 1991 to 1994, we used compositional analysis to assess habitat with survival and year as covariates for 38 radio-tagged partridge pairs. Comparing study area habitat to habitats within pair home ranges, we found overall habitat use was non-random with no year effect but a significant effect of survival status. Stubble habitat …
Release Of Pen-Reared Bobwhites: Potential Consequences To The Genetic Integrity Of Resident Wild Populations, Kristine O. Evans, Mark D. Smith, Loren W. Burger Jr., Rachel J. Chambers, Allan E. Houston, Rick Carlisle
Release Of Pen-Reared Bobwhites: Potential Consequences To The Genetic Integrity Of Resident Wild Populations, Kristine O. Evans, Mark D. Smith, Loren W. Burger Jr., Rachel J. Chambers, Allan E. Houston, Rick Carlisle
National Quail Symposium Proceedings
In response to low encounter rates with wild northern bobwhite (Colinus virginianus; hereafter bobwhite) during bird dog field trials at Ames Plantation in Tennessee, a large-scale release program of pen-reared bobwhites was implemented in fall 2002. To evaluate genetic effects of pen-reared releases on wild populations, we monitored survival of pen-reared and wild bobwhites from fall release of pen-reared bobwhites through the breeding season and collected feather samples from wild, pen-reared, and free-ranging juvenile bobwhites following the first breeding season after the initial release. We used genotypes from 6 polymorphic microsatellite loci to measure genetic diversity and conduct population assignment …
Habitat Use And Survival Of The Spoted Tinamou (Nothura Maculosa) In Agroecosystems In The Province Of Buenos Aires, Argentina, Jeffrey J. Thompson, John P. Carroll
Habitat Use And Survival Of The Spoted Tinamou (Nothura Maculosa) In Agroecosystems In The Province Of Buenos Aires, Argentina, Jeffrey J. Thompson, John P. Carroll
National Quail Symposium Proceedings
Changes in the composition and configuration of agricultural landscapes stemming from grassland conversion and agricultural intensification have contributed to the global declines of many grassland and shrubland birds. In both North America and Europe there exists a large body of research on the effects of agriculture on populations of terrestrial gamebirds. However, little research exists for these species in Argentina or Latin America in general. In Argentina the most important gamebird species is the spotted tinamou (Nothura maculosa). This species has become increasingly scarce in a significant portion of its range, possibly due to agricultural intensification over the last 15 …
Summer Male Call Index Relative To Nesting Chronology And Autumn Density Of The Northern Bobwhite, Theron M. Terhune, Richard G. Hamrick, D. Clay Sisson, H. Lee Stribling
Summer Male Call Index Relative To Nesting Chronology And Autumn Density Of The Northern Bobwhite, Theron M. Terhune, Richard G. Hamrick, D. Clay Sisson, H. Lee Stribling
National Quail Symposium Proceedings
We studied breeding season male call counts and breeding behavior of the Northern Bobwhite (Colinus virginianus) to determine the relationship between male calling activity and nesting chronology. Additionally, we examined the relationship between breeding season call counts and fall population size. Standardized call count routes were conducted on 6 different sites located in southwest Georgia and north Florida during the breeding season months (1 Apr - 31 Sep) in 2001 and 2002. An information theoretic approach was used to evaluate a set of 7 candidate, linear-mixed models describing breeding season calling of bobwhite males. Of the candidate models, the model …