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Identifier Title Type Subject
An objective approach to select surrogate species for connectivity conservationAn objective approach to select surrogate species for connectivity conservationTextConnectivity
Umbrella species
Surrogate species
Human influence
Item
An objective approach to select surrogate species for connectivity conservation
Type:Text
Subject:Connectivity
Umbrella species
Surrogate species
Human influence
Description:Connected landscapes can increase the effectiveness of protected areas by facilitating individual movement and gene flow between populations, thereby increasing the persistence of species even in fragmented habitats. Connectivity planning is often based on modeling connectivity for a limited number of species, i.e., “connectivity umbrellas”, which serve as surrogates for co-occurring species. Connectivity umbrellas are usually selected a priori, based on a few life history traits and often without evaluating other species. [show more]
Annual Report , Game, Fish and Parks Department, 1963-1964Annual Report , Game, Fish and Parks Department, 1963-1964Text
Item
Annual Report , Game, Fish and Parks Department, 1963-1964
Type:Text
Description:

Two reports. Varying titles:

  • 1963: The 1963 Annual Report of the Colorado Game, Fish and Parks Department: A Look Ahead
  • 1964: Colorado Game, Fish and Parks Department 1964 Annual Report

NOTE: No annual or biennial reports were issued until 1986.

For more reports in this digital collection see:

Print copies in CPW Library: SH 11 .C58

 [show more]
Annual Report, Colorado Division of Wildlife, 1992-2006Annual Report, Colorado Division of Wildlife, 1992-2006Text
Item
Annual Report, Colorado Division of Wildlife, 1992-2006
Type:Text
Description:

Fifteen reports covering 1992-2006. Reports are short, 2-8 pages with the exception of 1997 (24 pages).

Varying titles:

  • 1992-1997 (6 reports): For Wildlife, For People: YEAR Annual Report
  • 1998-2006 (9 reports): Colorado Division of Wildlife, YEAR Annual Report

For more reports in this digital collection see:

Preceding set: Annual Report to the People of Colorado, 1986-1991

Print copies in CPW Library: SH 11 .C58

 [show more]
Annual report, State of Colorado Department of Game and Fish, 1952-1962Annual report, State of Colorado Department of Game and Fish, 1952-1962Text
Item
Annual report, State of Colorado Department of Game and Fish, 1952-1962
Type:Text
Description:

Eleven reports covering 1952-1962.

Varying titles:

  • 1952-1957, 1958-1959 (6 reports): Annual Report, Fiscal Year YEAR-YEAR
  • 1957-1958: 1957-1958 Annual Report of the Colorado Game and Fish Department
  • 1959-1960: Annual Report Colorado Game and Fish Department Fiscal Year 1959-60
  • 1960: Game and Fish for the Future, 1960 Annual Report of the Colorado Game and Fish Department
  • 1961: A Look Back, a 65-Year History of the Colorado Game and Fish Department, 1961 Annual Report of the Colorado Game and Fish Department
  • 1962: Principles of Game and Fish Management, 1962 Annual Report of the Colorado Game and Fish Department

For more reports in this digital collection see:

Print copies in CPW Library: SH 11 .C58

 [show more]
Annual/Biennial Reports of the Game and Fish Department, 1926-1948Annual/Biennial Reports of the Game and Fish Department, 1926-1948Text
Item
Annual/Biennial Reports of the Game and Fish Department, 1926-1948
Type:Text
Description:

Nine reports covering 1926-1948.

Varying titles:

  • 1926-1931: Report of the Game and Fish Department of the State of Colorado, December 1, 1926 to June 30, 1931
  • 1934-1936: State of Colorado Department of Game and Fish, Biennial report, July 1, 1934, to June 30, 1936
  • 1939-1945 (4 reports): Biennial report, Colorado Game & Fish Commission, YEAR-YEAR
  • 1945-1947 (2 reports): The Colorado State Game and Fish Department, Annual Report, 1945-1946 and The Colorado State Game and Fish Department, Annual Report, 1945-1947
  • 1946-1948: State of Colorado Department of Game and Fish, Biennial Report, 1946 – 1948

For more reports in this digital collection see:

Print copies in CPW Library: SH 11 .C58 [show more]
ANS tips for boats with ballast tanksANS tips for boats with ballast tanksTextAquatic nuisance species
ANS
Boating
Item
ANS tips for boats with ballast tanks
Type:Text
Subject:Aquatic nuisance species
ANS
Boating
Description:Some wakeboard boats, ski boats and sailboats have ballast tanks which are filled with water to stabilize the boat and allow them to ride lower in the water. Many ballast tanks can’t be visually checked, and many cannot be fully drained.
Assessment of greater sage-grouse response to pinyon-juniper removal in the Parachute-Piceance-Roan population of northwestern ColoradoAssessment of greater sage-grouse response to pinyon-juniper removal in the Parachute-Piceance-Roan population of northwestern ColoradoTextGreater sage-grouse
<em>Centrocercus urophasianus</em>
Parachute-Piceance-Roan (PPR) region
Wildlife habitat improvement
Northwestern Colorado
Item
Assessment of greater sage-grouse response to pinyon-juniper removal in the Parachute-Piceance-Roan population of northwestern Colorado
Type:Text
Subject:Greater sage-grouse
<em>Centrocercus urophasianus</em>
Parachute-Piceance-Roan (PPR) region
Wildlife habitat improvement
Northwestern Colorado
Description:Greater sage-grouse (Centrocercus urophasianus) in the Parachute-Piceance-Roan (PPR) region of western Colorado face at least two major potential stressors: projected habitat loss from energy development and a long-term decline in habitat suitability associated with pinyon-juniper (PJ) encroachment. PJ removal may be a useful mitigation tool to offset potential habitat losses associated with energy development. Although PJ removal is commonly used to improve habitat for greater sage-grouse, no studies to date have quantified the timing or magnitude of how birds respond to treatments. Since 2008, Colorado Parks and Wildlife (CPW) has cooperated with industry and landowner partners to investigate the effectiveness of PJ removal for restoring sage-grouse habitat in the PPR. In fall 2008, I established nine “survey” study plots, arranged in three groups of three, with each group consisting of a sagebrush control plot, an untreated PJ control plot, and a PJ treatment plot. Treatments were completed on the three treatment plots in 2010 and 2011. [show more]
Assessment of prey vulnerability through analysis of wolf movement and kill sitesAssessment of prey vulnerability through analysis of wolf movement and kill sitesTextElk
Predation (Biology)
Wolves
Item
Assessment of prey vulnerability through analysis of wolf movement and kill sites
Type:Text
Subject:Elk
Predation (Biology)
Wolves
Description:Predator-prey models have traditionally been built on the assumption that neither predators nor prey are capable of learning or adapting behavior based on past interactions. As such, these models typically account for predation by forcing prey to experience a fixed level of predation risk. In order to develop species specific and more realistic models, the enemy-victim interaction behaviors of both predators and prey need to be studied. We quantified selection patterns for 2 fine scale behaviors of a recovering wolf population in Yellowstone National Park, Wyoming. Wolf spatial data were collected between November and May from 1998-1999 until 2001 -2002. Over four winters; 244 aerial locations, 522 ground based telemetry locations, 1,287 km of movement data from snow-tracking and the locations of 279 wolf kill sites were recorded. There was evidence that elk (Cervus elaphus) and bison (Bison bison) densities had a weak effect on the sites where wolves traveled and made kills. Wolf movements showed a strong selection for geothermal areas, meadows and areas in close proximity to edge. Proximity to edge and habitat class also had a strong influence on the locations where elk were most vulnerable to predation. There was little evidence that wolf kill sites differed from the places where wolves traveled, indicating that wolves selected to travel in areas where they were most successful at killing elk. Our results indicate that prey are more vulnerable to predators under certain conditions, predators are capable of selecting for these conditions, and as such, the notion of a fixed predation risk is largely inadequate. [show more]
Avian point count surveys: estimating components of the detection process
Avian point count surveys: estimating components of the detection process
TextEcology
Zoology
Biostatistics
Item
Avian point count surveys: estimating components of the detection process
Type:Text
Subject:Ecology
Zoology
Biostatistics
Description:Point count surveys of birds are commonly used to provide indices of abundance or, in some cases, estimates of true abundance. The most common use of point counts is to provide an index of population abundance or relative abundance. To make spatial or temporal comparisons valid using this type of count requires the very restrictive assumption of equal detection probability for the comparisons being made. We developed a multiple-independent observer approach to estimating abundance for point count surveys as a modification of the primary-secondary observer approach. This approach uses standard capture-recapture models, including models of inherent individual heterogeneity in detection probabilities and models using individual covariates to account for observable heterogeneity in detection probabilities. We also developed a time of detection approach for estimating avian abundance when birds are detected aurally, which is a modification of the time of removal approach. This approach requires collecting detection histories of individual birds in consecutive time intervals and modeling the detection process using a capture-recapture framework. This approach incorporates both the probability a bird is available for detection and the probability of detection given availability. We also present a multiple species modeling strategy since many point count surveys collect data on multiple species and present the approach for distance sampling, multiple observer, and time of detection approaches. The purpose of using a multiple species modeling approach is to obtain more parsimonious models by exploiting similarities in the detection process among species. We present a method for defining species groups which leads to an a priori set of species groups and associated candidate models. Finally, we present a method for estimating the availability probability of birds during a point count based on singing rate or detailed singing time data. This approach requires data collected in conjunction with point count surveys that describe the singing rates or singing time distribution of the bird population of interest. The singing rate approach requires the assumption that an individual bird sings following a random process but rates may vary between birds. Analyses presented throughout this thesis demonstrate the importance of accurately modeling the detection process to estimate abundance. The importance of accounting for individual heterogeneity in detection probabilities was evident in every chapter. Using a point count method that accounts for individual heterogeneity is crucial to estimating abundance effectively and making valid spatial, temporal and species comparisons. [show more]
Avian response to plague management on Colorado prairie dog coloniesAvian response to plague management on Colorado prairie dog coloniesTextPrairie dog
<em>Yersinia pestis</em>
Black-footed ferret
Plague
Avian species
Item
Avian response to plague management on Colorado prairie dog colonies
Type:Text
Subject:Prairie dog
<em>Yersinia pestis</em>
Black-footed ferret
Plague
Avian species
Description:Range-wide declines in prairie dog (Cynomys sp.) populations have occurred, and the largest limiting factor in recent decades appears to be the high mortality and colony extirpation associated with plague (Antolin et al. 2002), caused by the bacterium Yersinia pestis. Prairie dog colonies support a diverse community of associated species, many of which are not susceptible to plague but may be indirectly affected. [show more]