Duane Diefenbach, PhD (Former Employee)
Science and Products
Filter Total Items: 80
Deer harvest variation in small and large management units in Pennsylvania Deer harvest variation in small and large management units in Pennsylvania
Large game management units often lead to criticisms from hunters because they assume smaller units possess less variation in wildlife populations and more closely represent their local area. In 2003, Pennsylvania, USA, replaced smaller, socio-political county-based management units with larger wildlife management units (WMUs). We tested the hypothesis that smaller county units possessed...
Authors
Duane R. Diefenbach, Christopher S. Rosenberry
Evaluating inter-rater reliability and statistical power of vegetation measures assessing deer impact Evaluating inter-rater reliability and statistical power of vegetation measures assessing deer impact
Long-term vegetation monitoring projects are often used to evaluate how plant communities change through time in response to some external influence. Here, we evaluate the efficacy of vegetation monitoring to consistently detect changes in white-tailed deer browsing effects. Specifically, we compared inter-rater reliability (Cohen’s κ and Lin’s concordance correlation coefficient)...
Authors
Danielle R. Begley-Miller, Duane R. Diefenbach, Marc E. McDill, Christopher S. Rosenberry, Emily H. Just
Heterogeneity of a landscape influences size of home range in a North American cervid Heterogeneity of a landscape influences size of home range in a North American cervid
In the northeastern United States, chronic wasting disease has recently been detected in white-tailed deer (Odocoileus virginianus) populations, and understanding the relationship between landscape configuration and home range may improve disease surveillance and containment efforts. The objectives of our study were to compare size of home range for deer occupying a continuum of forested
Authors
W. David Walter, Tyler S. Evans, David Stainbrook, Bret D. Wallingford, Christopher S. Rosenberry, Duane R. Diefenbach
Incorporating detection probability to estimate pheasant density Incorporating detection probability to estimate pheasant density
ndices of abundance, such as point counts, commonly are used to monitor trends in bird populations. In some circumstances, however, an index of abundance provides insufficient information for making management decisions and accurate density estimates are necessary. Wild ring-necked pheasants (Phasianus colchicus) were translocated to 10 study areas in Pennsylvania from 2007 to 2014 with...
Authors
Lacey T. Williamson, W. David Walter, Scott R. Klinger, Duane R. Diefenbach
Landscape‐level patterns in fawn survival across North America Landscape‐level patterns in fawn survival across North America
A landscape‐level meta‐analysis approach to examining early survival of ungulates may elucidate patterns in survival not evident from individual studies. Despite numerous efforts, the relationship between fawn survival and habitat characteristics remains unclear and there has been no attempt to examine trends in survival across landscape types with adequate replication. In 2015–2016, we
Authors
Tess M. Gingery, Duane R. Diefenbach, Bret D. Wallingford, Christopher S. Rosenberry
Risky behavior and its effect on survival: snowshoe hare behavior under varying moonlight conditions Risky behavior and its effect on survival: snowshoe hare behavior under varying moonlight conditions
Predation and predation risk can exert strong influences on the behavior of prey species. However, risk avoidance behaviors may vary among populations of the same species. We studied a population of snowshoe hares (Lepus americanus) near the southern edge of their range, in Pennsylvania. This population occupies different habitat types, experiences different environmental conditions, and...
Authors
Laura C. Gigliotti, Duane R. Diefenbach
Moving in the Anthropocene: Global reductions in terrestrial mammalian movements Moving in the Anthropocene: Global reductions in terrestrial mammalian movements
Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the...
Authors
Marlee A. Tucker, Katrin Bohning-Gaese, William F. Fagan, John Fryxell, Bram Van Moorter, Susan C Alberts, Abdullahi H. Ali, Andrew M. Allen, Nina Attias, Tal Avgar, Hattie Bartlam-Brooks, Bayarbaatar Buuveibaatar, Jerrold L. Belant, Alessandra Bertassoni, Dean Beyer, Laura Bidner, Floris M. van Beest, Stephen Blake, Niels Blaum, Chloe Bracis, Danielle Brown, P. J. Nico de Bruyn, Francesca Cagnacci, J.M. Calabrese, Constanca Camilo-Alves, Simon Chamaille-Jammes, Andre Chiaradia, Sarah C. Davidson, Todd Dennis, Stephen DeStefano, Duane R. Diefenbach, Iain Douglas-Hamilton, Julian Fennessy, Claudia Fichtel, Wolfgang Fiedler, Christina Fischer, Ilya Fischhoff, Christen H. Fleming, Adam T. Ford, Susanne A. Fritz, Benedikt Gehr, Jacob R. Goheen, Eliezer Gurarie, Mark Hebblewhite, Marco Heurich, A. J. Mark Hewison, Christian Hof, Edward Hurme, Lynne A. Isbell, Rene Janssen, Florian Jeltsch, Petra Kaczensky, Adam Kane, Peter M. Kappeler, Matthew J. Kauffman, Roland Kays, Duncan Kimuyu, Flavia Koch, Bart Kranstauber, Scott LaPoint, Peter Leimgruber, John D. C. Linnell, Pascual Lopez-Lopez, A. Catherine Markham, Jenny Mattisson, Emilia Patricia Medici, Ugo Mellone, E. Merrill, Guilherme de Miranda Mourao, Ronaldo G. Morato, Nicolas Morellet, Thomas A. Morrison, Samuel L. Diaz-Munoz, Atle Mysterud, Dejid Nandintsetseg, Ran Nathan, Aidin Niamir, John Odden, Robert B. O’Hara, Luiz G. R. Oliveira-Santos, Kirk A. Olson, Bruce D. Patterson, Rogerio Cunha de Paula, Luca Pedrotti, Bjorn Reineking, Martin Rimmler, T. L. Rogers, Christer Moe Rolandsen, Christopher S. Rosenberry, Daniel I. Rubenstein, Kamran Safi, Sonia Said, Nir Sapir, Hall Sawyer, Niels Martin Schmidt, Nuria Selva, Agnieszka Sergiel, Enkhtuvshin Shiilegdamba, Joao Paulo Silva, N. Singh, Erling J. Solberg, Orr Spiegel, Olav Strand, S.R. Sundaresan, Wiebke Ullmann, Ulrich Voigt, J. Wall, David W. Wattles, Martin Wikelski, Christopher C. Wilmers, John W. Wilson, George Wittemyer, Filip Zieba, Tomasz Zwijacz-Kozica, Thomas Mueller
Snowshoe hare multi-level habitat use in a fire-adapted ecosystem Snowshoe hare multi-level habitat use in a fire-adapted ecosystem
Prescribed burning has the potential to improve habitat for species that depend on pyric ecosystems or other early successional vegetation types. For species that occupy diverse plant communities over the extent of their range, response to disturbances such as fire might vary based on post-disturbance vegetation dynamics among plant communities. Although responses of snowshoe hares...
Authors
Laura C. Gigliotti, Benjamin C. Jones, Matthew J. Lovallo, Duane R. Diefenbach
Geographic variation in winter adaptations of snowshoe hares (Lepus americanus) Geographic variation in winter adaptations of snowshoe hares (Lepus americanus)
Understanding adaptations of nonhibernating northern endotherms to cope with extreme cold is important because climate-induced changes in winter temperatures and snow cover are predicted to impact these species the most. We compared winter pelage characteristics and heat production of snowshoe hares (Lepus americanus Erxleben, 1777) on the southern edge of their range, in Pennsylvania...
Authors
Laura C. Gigliotti, Duane R. Diefenbach, M.J. Sheriff
Addressing wild turkey population declines using structured decision making Addressing wild turkey population declines using structured decision making
We present a case study from New York, USA, of the use of structured decision making (SDM) to identify fall turkey harvest regulations that best meet stakeholder objectives, in light of recent apparent declines in abundance of wild turkeys in the northeastern United States. We used the SDM framework to incorporate the multiple objectives associated with turkey hunting, stakeholder...
Authors
Kelly F. Robinson, Angela K. Fuller, Michael V. Schiavone, Bryan L. Swift, Duane R. Diefenbach, William F. Siemer, Daniel J. Decker
Biological and social outcomes of antler point restriction harvest regulations for white-tailed deer Biological and social outcomes of antler point restriction harvest regulations for white-tailed deer
Selective harvest criteria, such as antler point restrictions (APRs), have been used to regulate harvest of male ungulates; however, comprehensive evaluation of the biological and social responses to this management strategy is lacking. In 2002, Pennsylvania adopted new APRs for white-tailed deer (Odocoileus virginianus) that required, depending on wildlife management unit, ≥3 or ≥4...
Authors
Bret D. Wallingford, Duane R. Diefenbach, Eric S. Long, Christopher S. Rosenberry, Gary Alt
Timing of spring wild turkey hunting in relation to nest incubation Timing of spring wild turkey hunting in relation to nest incubation
State wildlife agencies are often requested to open spring wild turkey (Meleagris gallopavo; hereafter, turkey) hunting seasons earlier to increase hunter satisfaction by hunters hearing more gobbling male turkeys. Timing of spring turkey hunting season in several states, including Pennsylvania, has been established to open, on average, near median date of incubation initiation of turkey...
Authors
Mary Jo Casalena, Rex Everett, Wendy C. Vreeland, Ian D. Gregg, Duane R. Diefenbach
Science and Products
Filter Total Items: 80
Deer harvest variation in small and large management units in Pennsylvania Deer harvest variation in small and large management units in Pennsylvania
Large game management units often lead to criticisms from hunters because they assume smaller units possess less variation in wildlife populations and more closely represent their local area. In 2003, Pennsylvania, USA, replaced smaller, socio-political county-based management units with larger wildlife management units (WMUs). We tested the hypothesis that smaller county units possessed...
Authors
Duane R. Diefenbach, Christopher S. Rosenberry
Evaluating inter-rater reliability and statistical power of vegetation measures assessing deer impact Evaluating inter-rater reliability and statistical power of vegetation measures assessing deer impact
Long-term vegetation monitoring projects are often used to evaluate how plant communities change through time in response to some external influence. Here, we evaluate the efficacy of vegetation monitoring to consistently detect changes in white-tailed deer browsing effects. Specifically, we compared inter-rater reliability (Cohen’s κ and Lin’s concordance correlation coefficient)...
Authors
Danielle R. Begley-Miller, Duane R. Diefenbach, Marc E. McDill, Christopher S. Rosenberry, Emily H. Just
Heterogeneity of a landscape influences size of home range in a North American cervid Heterogeneity of a landscape influences size of home range in a North American cervid
In the northeastern United States, chronic wasting disease has recently been detected in white-tailed deer (Odocoileus virginianus) populations, and understanding the relationship between landscape configuration and home range may improve disease surveillance and containment efforts. The objectives of our study were to compare size of home range for deer occupying a continuum of forested
Authors
W. David Walter, Tyler S. Evans, David Stainbrook, Bret D. Wallingford, Christopher S. Rosenberry, Duane R. Diefenbach
Incorporating detection probability to estimate pheasant density Incorporating detection probability to estimate pheasant density
ndices of abundance, such as point counts, commonly are used to monitor trends in bird populations. In some circumstances, however, an index of abundance provides insufficient information for making management decisions and accurate density estimates are necessary. Wild ring-necked pheasants (Phasianus colchicus) were translocated to 10 study areas in Pennsylvania from 2007 to 2014 with...
Authors
Lacey T. Williamson, W. David Walter, Scott R. Klinger, Duane R. Diefenbach
Landscape‐level patterns in fawn survival across North America Landscape‐level patterns in fawn survival across North America
A landscape‐level meta‐analysis approach to examining early survival of ungulates may elucidate patterns in survival not evident from individual studies. Despite numerous efforts, the relationship between fawn survival and habitat characteristics remains unclear and there has been no attempt to examine trends in survival across landscape types with adequate replication. In 2015–2016, we
Authors
Tess M. Gingery, Duane R. Diefenbach, Bret D. Wallingford, Christopher S. Rosenberry
Risky behavior and its effect on survival: snowshoe hare behavior under varying moonlight conditions Risky behavior and its effect on survival: snowshoe hare behavior under varying moonlight conditions
Predation and predation risk can exert strong influences on the behavior of prey species. However, risk avoidance behaviors may vary among populations of the same species. We studied a population of snowshoe hares (Lepus americanus) near the southern edge of their range, in Pennsylvania. This population occupies different habitat types, experiences different environmental conditions, and...
Authors
Laura C. Gigliotti, Duane R. Diefenbach
Moving in the Anthropocene: Global reductions in terrestrial mammalian movements Moving in the Anthropocene: Global reductions in terrestrial mammalian movements
Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the...
Authors
Marlee A. Tucker, Katrin Bohning-Gaese, William F. Fagan, John Fryxell, Bram Van Moorter, Susan C Alberts, Abdullahi H. Ali, Andrew M. Allen, Nina Attias, Tal Avgar, Hattie Bartlam-Brooks, Bayarbaatar Buuveibaatar, Jerrold L. Belant, Alessandra Bertassoni, Dean Beyer, Laura Bidner, Floris M. van Beest, Stephen Blake, Niels Blaum, Chloe Bracis, Danielle Brown, P. J. Nico de Bruyn, Francesca Cagnacci, J.M. Calabrese, Constanca Camilo-Alves, Simon Chamaille-Jammes, Andre Chiaradia, Sarah C. Davidson, Todd Dennis, Stephen DeStefano, Duane R. Diefenbach, Iain Douglas-Hamilton, Julian Fennessy, Claudia Fichtel, Wolfgang Fiedler, Christina Fischer, Ilya Fischhoff, Christen H. Fleming, Adam T. Ford, Susanne A. Fritz, Benedikt Gehr, Jacob R. Goheen, Eliezer Gurarie, Mark Hebblewhite, Marco Heurich, A. J. Mark Hewison, Christian Hof, Edward Hurme, Lynne A. Isbell, Rene Janssen, Florian Jeltsch, Petra Kaczensky, Adam Kane, Peter M. Kappeler, Matthew J. Kauffman, Roland Kays, Duncan Kimuyu, Flavia Koch, Bart Kranstauber, Scott LaPoint, Peter Leimgruber, John D. C. Linnell, Pascual Lopez-Lopez, A. Catherine Markham, Jenny Mattisson, Emilia Patricia Medici, Ugo Mellone, E. Merrill, Guilherme de Miranda Mourao, Ronaldo G. Morato, Nicolas Morellet, Thomas A. Morrison, Samuel L. Diaz-Munoz, Atle Mysterud, Dejid Nandintsetseg, Ran Nathan, Aidin Niamir, John Odden, Robert B. O’Hara, Luiz G. R. Oliveira-Santos, Kirk A. Olson, Bruce D. Patterson, Rogerio Cunha de Paula, Luca Pedrotti, Bjorn Reineking, Martin Rimmler, T. L. Rogers, Christer Moe Rolandsen, Christopher S. Rosenberry, Daniel I. Rubenstein, Kamran Safi, Sonia Said, Nir Sapir, Hall Sawyer, Niels Martin Schmidt, Nuria Selva, Agnieszka Sergiel, Enkhtuvshin Shiilegdamba, Joao Paulo Silva, N. Singh, Erling J. Solberg, Orr Spiegel, Olav Strand, S.R. Sundaresan, Wiebke Ullmann, Ulrich Voigt, J. Wall, David W. Wattles, Martin Wikelski, Christopher C. Wilmers, John W. Wilson, George Wittemyer, Filip Zieba, Tomasz Zwijacz-Kozica, Thomas Mueller
Snowshoe hare multi-level habitat use in a fire-adapted ecosystem Snowshoe hare multi-level habitat use in a fire-adapted ecosystem
Prescribed burning has the potential to improve habitat for species that depend on pyric ecosystems or other early successional vegetation types. For species that occupy diverse plant communities over the extent of their range, response to disturbances such as fire might vary based on post-disturbance vegetation dynamics among plant communities. Although responses of snowshoe hares...
Authors
Laura C. Gigliotti, Benjamin C. Jones, Matthew J. Lovallo, Duane R. Diefenbach
Geographic variation in winter adaptations of snowshoe hares (Lepus americanus) Geographic variation in winter adaptations of snowshoe hares (Lepus americanus)
Understanding adaptations of nonhibernating northern endotherms to cope with extreme cold is important because climate-induced changes in winter temperatures and snow cover are predicted to impact these species the most. We compared winter pelage characteristics and heat production of snowshoe hares (Lepus americanus Erxleben, 1777) on the southern edge of their range, in Pennsylvania...
Authors
Laura C. Gigliotti, Duane R. Diefenbach, M.J. Sheriff
Addressing wild turkey population declines using structured decision making Addressing wild turkey population declines using structured decision making
We present a case study from New York, USA, of the use of structured decision making (SDM) to identify fall turkey harvest regulations that best meet stakeholder objectives, in light of recent apparent declines in abundance of wild turkeys in the northeastern United States. We used the SDM framework to incorporate the multiple objectives associated with turkey hunting, stakeholder...
Authors
Kelly F. Robinson, Angela K. Fuller, Michael V. Schiavone, Bryan L. Swift, Duane R. Diefenbach, William F. Siemer, Daniel J. Decker
Biological and social outcomes of antler point restriction harvest regulations for white-tailed deer Biological and social outcomes of antler point restriction harvest regulations for white-tailed deer
Selective harvest criteria, such as antler point restrictions (APRs), have been used to regulate harvest of male ungulates; however, comprehensive evaluation of the biological and social responses to this management strategy is lacking. In 2002, Pennsylvania adopted new APRs for white-tailed deer (Odocoileus virginianus) that required, depending on wildlife management unit, ≥3 or ≥4...
Authors
Bret D. Wallingford, Duane R. Diefenbach, Eric S. Long, Christopher S. Rosenberry, Gary Alt
Timing of spring wild turkey hunting in relation to nest incubation Timing of spring wild turkey hunting in relation to nest incubation
State wildlife agencies are often requested to open spring wild turkey (Meleagris gallopavo; hereafter, turkey) hunting seasons earlier to increase hunter satisfaction by hunters hearing more gobbling male turkeys. Timing of spring turkey hunting season in several states, including Pennsylvania, has been established to open, on average, near median date of incubation initiation of turkey...
Authors
Mary Jo Casalena, Rex Everett, Wendy C. Vreeland, Ian D. Gregg, Duane R. Diefenbach