Peter Gogan is a Scientist Emeritus at the Fort Collins Science Center
Science and Products
Filter Total Items: 18
Pregnancy rates in central Yellowstone bison
Plains bison (Bison b. bison) centered on Yellowstone National Park are chronically infected with brucellosis (Brucella abortus) and culled along the park boundaries to reduce the probability of disease transmission to domestic livestock. We evaluated the relationship between pregnancy rates and age, dressed carcass weight, and serological status for brucellosis among bison culled from the central
Authors
Peter J. Gogan, Robin E. Russell, Edward M. Olexa, Kevin M. Podruzny
Re-introduction of tule elk to Point Reyes National Seashore, California, USA
Tule elk (Cervus elaphus nannodes), a subspecies endemic to California, was historically found in large herds throughout much of central and coastal California. Market hunting during the California Gold Rush decimated these herds, and by 1895, only two to 10 elk remained. This remnant group was protected and served as the source for early relocation efforts (McCullough, 1971). Early efforts were g
Authors
Peter J. Gogan, McCrea A. Cobb, Natalie B. Gates, Reginald H. Barrett
Genetic population substructure in bison at Yellowstone National Park
The Yellowstone National Park bison herd is 1 of only 2 populations known to have continually persisted on their current
landscape since pre-Columbian times. Over the last century, the census size of this herd has fluctuated from around 100
individuals to over 3000 animals. Previous studies involving radiotelemetry, tooth wear, and parturition timing provide
evidence of at least 2 distinct groups
Authors
Natalie D. Halbert, Peter J. Gogan, Philip W. Hedrick, Jacquelyn M. Wahl, James N. Derr
Estimating survival rates with time series of standing age‐structure data
It has long been recognized that age‐structure data contain useful information for assessing the status and dynamics of wildlife populations. For example, age‐specific survival rates can be estimated with just a single sample from the age distribution of a stable, stationary population. For a population that is not stable, age‐specific survival rates can be estimated using techniques such as inver
Authors
Mark S. Udevitz, Peter J. Gogan
Aerial survey estimates of fallow deer abundance
Reliable estimates of the distribution and abundance of an ungulate species is essential prior to establishing and implementing a management program. We used ground surveys to determine distribution and ground and aerial surveys and individually marked deer to estimate the abundance of fallow deer (Dama dama) in north-coastal California. Fallow deer had limited distribution and heterogeneous densi
Authors
Peter J. Gogan, Natalie B. Gates, Bruce C. Lubow, Suzanne Pettit
Bison conservation initiative: Bison conservation genetics workshop: Report and recommendations
One of the first outcomes of the Department of the Interior (DOI) Bison Conservation Initiative was the Bison Conservation Genetics Workshop held in Nebraska in September 2008. The workshop brought together scientists from government agencies and non-governmental organizations with professional population geneticists to develop guidance for the genetic management of the federal bison herds. The sc
Authors
Peter J. Gogan, Peter Dratch
Bringing wisents back to the Caucasus Mountains: 70 years of a grand mission
We describe the history of mountain wisent restoration in the north-west Caucasus region. We review information on wisent during the 18th and 19th centuries, contemporary regional development and reasons for wisent extirpation. We emphasize the key role of the Kuban Hunting Reserve as a main factor in preserving wisent in this region between 1888 and 1909. The article provides information on the f
Authors
Taras Sipko, Sergei Trepet, Peter J. Gogan, Ivan Mizin
Survey of ungulate abundance on Santa Rosa Island, Channel Islands National Park, California, March 2009
Reliable estimates of elk (Cervus elaphus) and deer (Odocoileus hemionus) abundance on Santa Rosa Island, Channel Islands National Park, California, are required to assess the success of management actions directed at these species. We conducted a double-observer aerial survey of elk on a large portion of Santa Rosa Island on March 19, 2009. All four persons on the helicopter were treated as obser
Authors
Paul C. Griffin, Kate A. Schoenecker, Peter J. Gogan, Bruce C. Lubow
Historic distribution and challenges to bison recovery in the northern Chihuahuan Desert
Ecologists and conservationists have long assumed that large grazers, including bison (Bison bison), did not occur in post-Pleistocene southwestern North America. This perception has been influential in framing the debate over conservation and land use in the northern Chihuahuan Desert. The lack of an evolutionary history of large grazers is being used to challenge the validity of ranching as a c
Authors
Rurik List, Gerardo Ceballos, Charles Curtin, Peter J. Gogan, Jesus Pacheco, Joe Truett
Second chance for the plains bison
Before European settlement the plains bison (Bison bison bison) numbered in the tens of millions across most of the temperate region of North America. Within the span of a few decades during the mid- to late-1800s its numbers were reduced by hunting and other factors to a few hundred. The plight of the plains bison led to one of the first major movements in North America to save an endangered spec
Authors
Curtis H. Freese, K. Aune, D. Boyd, James N. Derr, Steven C. Forrest, C. Cormack Gates, Peter J. Gogan, Shaun M. Grassel, Natalie D. Halbert, Kyran Kunkel, Kent Redford
Spatial population structure of Yellowstone bison
Increases in Yellowstone National Park, USA, bison (Bison bison) numbers and shifts in seasonal distribution have resulted in more frequent movements of bison beyond park boundaries and development of an interagency management plan for the Yellowstone bison population. Implementation of the plan under the adaptive management paradigm requires an understanding of the spatial and temporal structure
Authors
Edward M. Olexa, Peter J. Gogan
A simple solar radiation index for wildlife habitat studies
Solar radiation is a potentially important covariate in many wildlife habitat studies, but it is typically addressed only indirectly, using problematic surrogates like aspect or hillshade. We devised a simple solar radiation index (SRI) that combines readily available information about aspect, slope, and latitude. Our SRI is proportional to the amount of extraterrestrial solar radiation theoretica
Authors
Kim A. Keating, Peter J. Gogan, John N. Vore, Lynn R. Irby
Northern Yellowstone Mule Deer Movements and Demographics
This data product includes two datasets acquired for the study of northern Yellowstone mule deer seasonal movement and survival patterns. One data set "Point Locations of Radio-collared female northern Yellowstone mule deer" provides details about the date and time of relocations of radio-collared female northern Yellowstone mule deer along with location coordinates. Habitat types with which the d
Science and Products
- Publications
Filter Total Items: 18
Pregnancy rates in central Yellowstone bison
Plains bison (Bison b. bison) centered on Yellowstone National Park are chronically infected with brucellosis (Brucella abortus) and culled along the park boundaries to reduce the probability of disease transmission to domestic livestock. We evaluated the relationship between pregnancy rates and age, dressed carcass weight, and serological status for brucellosis among bison culled from the centralAuthorsPeter J. Gogan, Robin E. Russell, Edward M. Olexa, Kevin M. PodruznyRe-introduction of tule elk to Point Reyes National Seashore, California, USA
Tule elk (Cervus elaphus nannodes), a subspecies endemic to California, was historically found in large herds throughout much of central and coastal California. Market hunting during the California Gold Rush decimated these herds, and by 1895, only two to 10 elk remained. This remnant group was protected and served as the source for early relocation efforts (McCullough, 1971). Early efforts were gAuthorsPeter J. Gogan, McCrea A. Cobb, Natalie B. Gates, Reginald H. BarrettGenetic population substructure in bison at Yellowstone National Park
The Yellowstone National Park bison herd is 1 of only 2 populations known to have continually persisted on their current landscape since pre-Columbian times. Over the last century, the census size of this herd has fluctuated from around 100 individuals to over 3000 animals. Previous studies involving radiotelemetry, tooth wear, and parturition timing provide evidence of at least 2 distinct groupsAuthorsNatalie D. Halbert, Peter J. Gogan, Philip W. Hedrick, Jacquelyn M. Wahl, James N. DerrEstimating survival rates with time series of standing age‐structure data
It has long been recognized that age‐structure data contain useful information for assessing the status and dynamics of wildlife populations. For example, age‐specific survival rates can be estimated with just a single sample from the age distribution of a stable, stationary population. For a population that is not stable, age‐specific survival rates can be estimated using techniques such as inverAuthorsMark S. Udevitz, Peter J. GoganAerial survey estimates of fallow deer abundance
Reliable estimates of the distribution and abundance of an ungulate species is essential prior to establishing and implementing a management program. We used ground surveys to determine distribution and ground and aerial surveys and individually marked deer to estimate the abundance of fallow deer (Dama dama) in north-coastal California. Fallow deer had limited distribution and heterogeneous densiAuthorsPeter J. Gogan, Natalie B. Gates, Bruce C. Lubow, Suzanne PettitBison conservation initiative: Bison conservation genetics workshop: Report and recommendations
One of the first outcomes of the Department of the Interior (DOI) Bison Conservation Initiative was the Bison Conservation Genetics Workshop held in Nebraska in September 2008. The workshop brought together scientists from government agencies and non-governmental organizations with professional population geneticists to develop guidance for the genetic management of the federal bison herds. The scAuthorsPeter J. Gogan, Peter DratchBringing wisents back to the Caucasus Mountains: 70 years of a grand mission
We describe the history of mountain wisent restoration in the north-west Caucasus region. We review information on wisent during the 18th and 19th centuries, contemporary regional development and reasons for wisent extirpation. We emphasize the key role of the Kuban Hunting Reserve as a main factor in preserving wisent in this region between 1888 and 1909. The article provides information on the fAuthorsTaras Sipko, Sergei Trepet, Peter J. Gogan, Ivan MizinSurvey of ungulate abundance on Santa Rosa Island, Channel Islands National Park, California, March 2009
Reliable estimates of elk (Cervus elaphus) and deer (Odocoileus hemionus) abundance on Santa Rosa Island, Channel Islands National Park, California, are required to assess the success of management actions directed at these species. We conducted a double-observer aerial survey of elk on a large portion of Santa Rosa Island on March 19, 2009. All four persons on the helicopter were treated as obserAuthorsPaul C. Griffin, Kate A. Schoenecker, Peter J. Gogan, Bruce C. LubowHistoric distribution and challenges to bison recovery in the northern Chihuahuan Desert
Ecologists and conservationists have long assumed that large grazers, including bison (Bison bison), did not occur in post-Pleistocene southwestern North America. This perception has been influential in framing the debate over conservation and land use in the northern Chihuahuan Desert. The lack of an evolutionary history of large grazers is being used to challenge the validity of ranching as a cAuthorsRurik List, Gerardo Ceballos, Charles Curtin, Peter J. Gogan, Jesus Pacheco, Joe TruettSecond chance for the plains bison
Before European settlement the plains bison (Bison bison bison) numbered in the tens of millions across most of the temperate region of North America. Within the span of a few decades during the mid- to late-1800s its numbers were reduced by hunting and other factors to a few hundred. The plight of the plains bison led to one of the first major movements in North America to save an endangered specAuthorsCurtis H. Freese, K. Aune, D. Boyd, James N. Derr, Steven C. Forrest, C. Cormack Gates, Peter J. Gogan, Shaun M. Grassel, Natalie D. Halbert, Kyran Kunkel, Kent RedfordSpatial population structure of Yellowstone bison
Increases in Yellowstone National Park, USA, bison (Bison bison) numbers and shifts in seasonal distribution have resulted in more frequent movements of bison beyond park boundaries and development of an interagency management plan for the Yellowstone bison population. Implementation of the plan under the adaptive management paradigm requires an understanding of the spatial and temporal structureAuthorsEdward M. Olexa, Peter J. GoganA simple solar radiation index for wildlife habitat studies
Solar radiation is a potentially important covariate in many wildlife habitat studies, but it is typically addressed only indirectly, using problematic surrogates like aspect or hillshade. We devised a simple solar radiation index (SRI) that combines readily available information about aspect, slope, and latitude. Our SRI is proportional to the amount of extraterrestrial solar radiation theoreticaAuthorsKim A. Keating, Peter J. Gogan, John N. Vore, Lynn R. Irby - Data
Northern Yellowstone Mule Deer Movements and Demographics
This data product includes two datasets acquired for the study of northern Yellowstone mule deer seasonal movement and survival patterns. One data set "Point Locations of Radio-collared female northern Yellowstone mule deer" provides details about the date and time of relocations of radio-collared female northern Yellowstone mule deer along with location coordinates. Habitat types with which the d