575 items found
Type:Text
Description:
Published under title: Wildlife Research Report from 1980-2000. This set contains 1995-2000.Wildlife Research Report (1980-1987)
Some quarters contain multiple volumes.Continues: Game Research Report (1963-1969) 1963-1969 | 1971-1979Continued by: Wildlife Research Report. Mammals (2001-current). Avian research did not publish quarterly/annual report from 2001-2009.
Print copy: Federal Aid binders
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Subjects:
Description:
Published under title: Wildlife Research Report. Mammals from 2001-2023. Beginning in 2001, the annual reports include non Federal Aid research as well as Federal Aid. Beginning in 2014 the annual report was issued with executive summaries for each project. For those projects receiving Federal Aid funding, the full Federal Aid report is included in the print binder and cataloged by project title in the Library catalog. Progress reports for mammals and avian Federal Aid research. See Mammals Research: Progress Reports (1939-current) for a listing of collated reports for each mammals project (avian to be added in the future). Continues: Wildlife Research Report (1980-2000) 1980-1987 | 1988-1994 | 1995-2000
Continued by: Mammals Research Summary Report (2024- ). Print copy: Federal Aid binders and SK 375 .W5 [show more]
Description:
Since 1996, millions of acres of Colorado forests have fallen victim to bark beetle infestations. This unusual epidemic has prompted CPW to focus research efforts on how wildlife are responding to these outbreaks.
Bark Beetle Research Projects:
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Subjects:
Description:Wildlife species profiles, compiled in 2016, for priority wetland-dependent birds, mammals, fish, amphibians, and reptiles. The purpose of the profiles is to provide landowners and land managers with easy-to-use guidelines for understanding habitat needs of priority wetland-dependent wildlife. Find current species profiles on CPW websiteSpecies profiles included:BIRDS
- American bittern
- Bald eagle
- Black rail
- Dabbling ducks
- Least tern
- Lewis's woodpecker
- Long-billed curlew
- Piping plover
- Sandhill crane
- Short-eared owl
- Preble's jumping mouse
- River otter
- Arkansas darter
- Brassy minnow
- N. redbelly dace
- S. redbelly dace
- N. leopard frog
- Plains leopard frog
- Red-sided garter snake
- Yellow mud turtle
Type:
Subjects:
Type: Article
Subjects: Canada lynx
Colorado
Diet
Hunting success
<em>Lepus americanus</em>
<em>Lynx canadensis</em>
Red squirrel
Refugia
Snowshoe hare
Stem density
<em>Tamiasciurus hudsonicus</em>
Colorado
Diet
Hunting success
<em>Lepus americanus</em>
<em>Lynx canadensis</em>
Red squirrel
Refugia
Snowshoe hare
Stem density
<em>Tamiasciurus hudsonicus</em>
Type:Article
Subject:Canada lynx
Colorado
Diet
Hunting success
<em>Lepus americanus</em>
<em>Lynx canadensis</em>
Red squirrel
Refugia
Snowshoe hare
Stem density
<em>Tamiasciurus hudsonicus</em>
Colorado
Diet
Hunting success
<em>Lepus americanus</em>
<em>Lynx canadensis</em>
Red squirrel
Refugia
Snowshoe hare
Stem density
<em>Tamiasciurus hudsonicus</em>
Description:Information regarding the diet of Canada lynx (Lynx canadensis) at the southernmost extent of its range is critical for managing the species under current and predicted climate conditions. Therefore, from 1999–2009, we investigated winter diet and hunting strategies of Canada lynx in Colorado, USA by tracking individuals in the snow to identify sites where lynx encountered and killed prey. Similar to other parts of lynx range, snowshoe hares (Lepus americanus) were the primary winter food in Colorado, especially when considering total biomass consumed. Red squirrels (Tamiasciurus hudsonicus) comprised the bulk of the remaining food items and were a substantial occurrence during several years, which is consistent with previous hypotheses regarding the diet of lynx in southerly populations. Lynx successfully captured snowshoe hares on 31% of attempts and red squirrels on 47% of attempts, similar to lynx in other regions. In contrast to other populations, the majority of chases of both prey species were initiated while actively hunting rather than by ambush and this behavior did not change through time. We found evidence for snowshoe hare refugia during winter; hunting success for hares peaked at sites with approximately 3,000 stems/ha, but was lower in more dense vegetation where hare densities were greater. Given this finding and the apparent importance of red squirrels as alternate prey, we suggest that management for lynx in the southern Rocky Mountains, USA, focus on maintenance of mature, uneven-aged Engelmann spruce (Picea engelmannii)-subalpine fir (Abies lasiocarpa) stands. Such stands naturally provide patches of dense and open habitats juxtaposed closely together that should simultaneously facilitate high hare densities (and refuge from predation) and accessibility to hares by lynx. Mature trees in such stands also provide abundant cone crops to sustain populations of red squirrels for use as alternate prey. [show more]
Type: Article
Subjects: Backcountry skiing
Colorado
Dispersed recreation
Functional response
Habitat selection
Heliskiing
<em>Lynx canadensis</em>
Outdoor recreation
Resource-selection functions
Snowmobiling
Winter recreation
Colorado
Dispersed recreation
Functional response
Habitat selection
Heliskiing
<em>Lynx canadensis</em>
Outdoor recreation
Resource-selection functions
Snowmobiling
Winter recreation
Type:Article
Subject:Backcountry skiing
Colorado
Dispersed recreation
Functional response
Habitat selection
Heliskiing
<em>Lynx canadensis</em>
Outdoor recreation
Resource-selection functions
Snowmobiling
Winter recreation
Colorado
Dispersed recreation
Functional response
Habitat selection
Heliskiing
<em>Lynx canadensis</em>
Outdoor recreation
Resource-selection functions
Snowmobiling
Winter recreation
Description:Outdoor recreationists are important advocates for wildlife on public lands. However, balancing potential impacts associated with increased human disturbance with the conservation of sensitive species is a central issue facing ecologists and land managers alike, especially for dispersed winter recreation due to its disproportionate impact to wildlife. We studied how dispersed winter recreation (outside developed ski areas) impacted a reintroduced meso-carnivore, Canada lynx (Lynx canadensis), at the southern periphery of the species’ range in the southern Rocky Mountains. On a voluntary basis, we distributed global positioning system (GPS) units to winter recreationists and documented 2143 spatial movement tracks of recreationists engaged in motorized and nonmotorized winter sports for a total cumulative distance of 56,000 km from 2010 to 2013. We also deployed GPS radio collars on adult Canada lynx that were resident in the mountainous topography that attracted high levels of dispersed winter recreation. We documented that resource-selection models (RSFs) for Canada lynx were significantly improved when selection patterns of winter recreationists were included in best-performing models. Canada lynx and winter recreationists partitioned environmental gradients in ways that reduced the potential for recreation-related disturbance. Although the inclusion of recreation improved the RSF model for Canada lynx, environmental covariates explained most variation in resource use. The environmental gradients that most separated areas selected by Canada lynx from those used by recreationists were forest canopy closure, road density, and slope. Canada lynx also exhibited a functional response of increased avoidance of areas selected by motorized winter recreationists (snowmobiling off-trail, hybrid snowmobile) compared with either no functional response (hybrid ski) or selection for (backcountry skiing) areas suitable for nonmotorized winter recreation. We conclude with a discussion of implications associated with providing winter recreation balanced with the conservation of Canada lynx. [show more]
Type: Article
Subjects: Predator–prey interactions
Prey selection
Wolf
Elk
Bison
Prey selection
Wolf
Elk
Bison
Type:Article
Subject:Predator–prey interactions
Prey selection
Wolf
Elk
Bison
Prey selection
Wolf
Elk
Bison
Description:The ability of predators to successfully capture and kill prey is affected by the abundance and diversity of the prey assemblage, and such variation is a fundamental driver of ecosystem dynamics because per capita consumption rate strongly influences the stability and strength of community interactions. Descriptions of predatory behavior in this context typically include the functional response, specifically the kill rate of a predator as a function of prey density. Thus, a major objective in studying predator–prey interactions is to evaluate the strength of the numerous factors related to the kill rate of a predator, and to subsequently determine the forms of its functional response in natural systems because different forms have different consequences for ecosystem dynamics. Recent controversies over the nature of predation focus on the respective roles of prey and predator abundance in affecting the functional response. However, resolution requires more direct measures of kill rates in natural systems. We estimated wolf (Canis lupus) kill rates in a tractable and newly established wolf–elk (Cervus elaphus)–bison (Bison bison) system in the Madison headwaters area of Yellowstone National Park during winters 1998–1999 to 2006–2007 to document the transition from over seven decades without wolves to a well-established top predator population. Wolf abundance, distribution, and prey selection varied during the study, concurrent with variations in the demography, distribution, and behavior of elk and bison. These dynamics enabled us to evaluate factors influencing variations in wolf kill rates and the forms of their functional response. [show more]
Type: Article
Subjects: Prey selection
Wolf
Elk
Bison
Wolf
Elk
Bison
Type:Article
Subject:Prey selection
Wolf
Elk
Bison
Wolf
Elk
Bison
Description:What a predator eats when given choices, and the subsequent effects of this behavior on ecosystem stability, has long been a topic of interest for ecologists. href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/prey-selection" title="Learn more about Prey Selection from ScienceDirect's AI-generated Topic Pages" class="topic-link" target="_blank" rel="noreferrer noopener">Prey selection is influenced by the absolute and relative abundances of prey types, the life history characteristics of predators and prey, and the attributes of the environment in which these interactions occur. Strong preference by a predator for a particular prey type can lead to ecosystem instability, while prey switching can lessen predation effects on the less abundant prey and enhance system stability. Evaluating prey selection in large mammal systems is difficult due to the broad spatial and temporal scales at which these predatory interactions occur, and investigations, particularly with wolf-ungulate systems, typically involve only the primary prey. Multiple prey species characterize most large mammal predator-prey systems, therefore research into predator-multiple prey dynamics has the potential to yield important ecological insights. We studied winter prey selection during 1996–1997 through 2006–2007 in a newly established wolf-elk-bison system where prey differed substantially in their vulnerability to wolf ( Canis lupus) predation and wolves preyed primarily on elk (Cervus elaphus) but also used bison (Bison bison) to varying degrees within and among winters and packs. We analyzed the relative influences of prey abundance, predator abundance, and environmental variables on the selection of prey species and age classes and evaluated whether wolves exhibited prey switching from elk to bison. [show more]