Download or read book Investigation of Winter Habitat Selection by Woodland Caribou in Relation to Forage Abundance and Snow Accumulation written by Douglas MacNearney and published by . This book was released on 2013 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canopy Snow and Lichens on Woodland Caribou Range in Southeastern Manitoba written by James Allan Schaefer and published by [Thunder Bay, Ont.] : Lakehead Centre for Northern Studies. This book was released on 1990 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Movements Habitat Use and Winter Feeding Ecology of Woodland Caribou in West central British Columbia written by Deborah Bernadette Cichowski and published by . This book was released on 1993 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The West-Central BC Caribou Research Project was set up to investigate potential effects of logging on caribou in the Tweedsmuir-Entiako and Itcha-Ilgachuz-Rainbow areas. The original studies were expanded to include more intensive investigations of winter range and population parameters. The objectives of the project were to determine seasonal movements, habitat use and food habits of caribou in these areas, especially during winter so that logging guidelines compatible with caribou winter habitat use could be developed; and to determine population size, calf production, and calf and adult survival, so that current population status and limiting factors could be determined. This report summarizes results on caribou seasonal movements, habitat use and food habits. The report discusses methods for capture and marking, seasonal movements and habitat use, snow measurements, winter feeding ecology and fecal analyses. Results and discussion are also provided for these as well as for winter forest cover type use.
Download or read book Woodland Caribou Restoration at Isle Royale National Park written by Jean Fitts Cochrane and published by . This book was released on 1996 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multi scale Habitat Selection by Boreal Woodland Caribou in the Saht Gwich in and Inuvialuit Regions of the Northwest Territories written by Stantec Consulting Ltd and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: To expand upon previous Department of Environment and Natural Resource (ENR) studies of habitat selection by boreal woodland caribou in the northern part of their Northwest Territories (NWT) range (Nagy et al. 2005, 2006), resource selection function (RSF) analysis was carried out with data from 58 boreal caribou that were fitted with satellite and GPS collars between 2002 and 2011 in the Sahtú, Gwichʼin and Inuvialuit Settlement Regions (ISR). Habitat selection by boreal caribou was evaluated at two spatial scales: the selection of home ranges within the study area (broad scale) and the selection for different areas within each caribou's home range (finer scale). Each scale of habitat selection was evaluated separately for the winter, calving, summer, and fall breeding seasons. To evaluate selection of home ranges within the study area, habitat features at random locations drawn within individual seasonal home ranges were contrasted to habitat features at random locations distributed throughout the study area. Habitat selection within home ranges was evaluated by comparing habitat features at each observed collar location to habitat features at random locations drawn from within individual seasonal home ranges. This approach allowed the two scales of habitat selection to be combined into RSF maps that captured both scales of habitat selection. Habitat features considered in the analysis included land cover type, vegetation productivity, slope, elevation, distance to lakes and rivers, density and distance to seismic lines, presence of roads, and presence of forest fires
Download or read book Proceedings of 6th North American Caribou Workshop written by and published by . This book was released on 1996 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2006 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foraging Ecology of Woodland Caribou in Boreal and Montane Ecosystems of Northeastern British Columbia written by Kristin Denryter and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Woodland caribou (Rangifer tarandus caribou) are an iconic species of boreal and montane ecosystems, but many populations are declining due to habitat alteration and associated changes in predator-prey dynamics. Summer forage, however, influences lactation, juvenile growth, pregnancy, and survival, thereby affecting individuals and populations. I used tame caribou (of three nutritional classes - lactating, non-lactating, yearling) as a habitat assessment tool, at 135 sites across northeastern British Columbia, to determine: food habits and selection; dry matter intake rates; diet quality; and daily nutrient intakes. My goal was to assess the suitability of nutritional resources in boreal and montane plant communities to support energy and protein requirements of caribou during summer. Caribou were highly selective foragers. Deciduous shrubs were the primary summer forage of caribou; forbs, lichens, and mushrooms were secondary dietary items. Intake rates by caribou increased with increasing bite masses and quantities of accepted forage biomass (vegetation species used proportionately more than or equal to availability). Caribou achieved highest intakes at sites with an abundance of selected deciduous shrubs (e.g., willow-alpine sites, young forests) that afforded large bite masses, whereas lowest intakes occurred where mean bite masses were small (e.g., dry alpine, nutrient-poor forests). Dietary digestible energy (DE) and protein (DP) content, intake rates, and foraging time varied across plant communities and among nutritional classes. Caribou increased foraging time, but could not compensate for low intake rates and some plant communities failed to provide caribou with adequate nutrient intakes to support nutritional demands for lactation and maintenance of body mass. Although highest nutrient intakes were associated with productive sites, predation risk and disturbance may constrain the nutritional benefits caribou can acquire from these sites. In a pilot study, I mapped foodscapes of DE and DP intakes for a herd of free-ranging boreal caribou. Caribou did not select for nutrient intakes, but other factors including food quantity, predation risk, and accuracy of spatial data layers, may have confounded my ability to isolate the role of nutrition in habitat selection. Insights from this study into the nutritional ecology of caribou during summer can better inform caribou conservation and management.
Download or read book Plasticity in Selection Strategies of Woodland Caribou Rangifer Tarandus Caribou During Winter and Calving written by David D. Gustine and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Woodland caribou may be an important indicator' or focal species for management agencies because they require large areas to persist and are sensitive to both direct and indirect forms of disturbance. Prior to industrial development in northern regions, it is important to acquire baseline information on areas that are important to local 'herds' as well as to identify physiological and ecological mechanisms of resource selection. I used global positioning system (GPS) data from caribou {Rangifer tarandus caribou), wolves {Canis lupus), and grizzly bears {Ursus arctos), and satellite imagery, resource selection functions, and cause-specific mortality data from 50 caribou neonates to define calving and wintering areas of woodland caribou in northern British Columbia. I identified scale-dependant mechanisms of selection relative to predation risk (calving, summer, winter, and late winter) and forage availability (calving and summer), and energetic costs of movement (winter and late winter) at 2 spatial scales, and quantified the variation in responses to these mechanisms among individual caribou. In all seasons, caribou selected habitats in a hierarchical fashion, and exhibited high variation among individuals. Three unique calving areas, or calving strategies, were defined for the Greater Besa Prophet area; each calving area had different attributes of risk and forage. During calving, spatial separation from areas of high wolf risk was important to parturient females as was access to areas of high vegetative change (i.e., forage quality); animals made trade-off decisions between minimizing the risk of predation and securing forage to address the high nutritional demands of lactation. Calf survival through the first 2 months of life ranged from 54% in 2002 to 79% in 2003. A total of 19 of 50 neonates died during the summers, of which 17 were by predation: wolverines (age of calves 14 d) and wolves (age of calves 18 d) each killed 5 calves. Movements away from calving sites (>1 km) peaked during the third week of life and increased the odds of a neonate surviving by 196%. These movements coincided with a change in vegetative phenology and the high energetic demands of lactation. During winter and late winter, minimizing the energetic costs of movement was the most important parameter in the selection of resources at a smaller spatial scale defined by seasonal movement, whereas Individual caribou showed increased sensitivity to the components of risk at a larger scale of the home range. Variation in the selection of resources by individuals was high, but some similarities facilitated using pooled use/availability data to model resource selection. These pooled models, however, collapsed important biological variation in the selection of resources, limiting biological interpretation of selection models. Variation in the selection of resources among individuals (i.e., plasticity) during all times of the year may be an important life-history strategy for woodland caribou to decrease their predictability on the landscape to major predators. Identifying and maintaining this variation within selection strategies is an important step towards determining the ability of caribou populations to persist in the presence of environmental and anthropogenic disturbance."--Pages ii-iii.
Download or read book Close Encounters of the Burned Kind written by Kelsey L.M. Russell and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest fire is the primary natural disturbance process influencing the distribution and abundance of terrestrial lichens across ranges of woodland caribou (Rangifer tarandus caribou), including the Klaza Caribou Herd in west-central Yukon. I used stand and understory data to understand variation in the abundance of lichens in burns of various ages. Focusing on the distribution of individual caribou, I used a dataset of GPS collar locations to examine resource selection on the winter range and within burns. Results suggested that burns provided suboptimal habitat for the KCH until 50 years post-fire; however, analyses focused on the use of burned habitat indicated that they regularly encountered burns and opportunistically used remnant lichen within the burn perimeter. The relationship between caribou and burned landscapes is complex and non-linear indicating that wildlife managers should look beyond burn age to account for the effects of fire on the availability and quality of caribou habitat.
Download or read book Woodland Caribou Habitat Selection During Winter and Along Migratory Routes in Westcentral Alberta written by Dorothy Joanne Saher and published by . This book was released on 2005 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Spatial Variation in Forage Availability and Predation Risk on Habitat Selection by Woodland Caribou Rangifer Tarandus Caribou in Ontario written by Madeleine McGreer and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wild Mammals of North America written by George A. Feldhamer and published by JHU Press. This book was released on 2003-11-19 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
Download or read book Seasonal Movements and Habitat Selection by Woodland Caribou in the Wolverine Herd North central British Columbia Phase 2 written by Eliot L. Terry and published by . This book was released on 1999 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Omineca Mountains Woodland Caribou Project was initiated in 1991 to provide detailed information on a caribou population residing on the west side of Williston Reservoir, British Columbia. This report presents results of phase 2 of the Project, which focussed on the use of forested habitat & seasonal movement patterns by caribou of the Wolverine Herd, 1994-97. The report begins with background on the characteristics of the study area and the research methods used, which included capture & radio collaring of 27 caribou, monitoring of the collared caribou by radio telemetry during radio tracking flights during summer & winter, habitat analyses based on forest cover maps, and statistical analyses of correlations between caribou locations & habitat type. Results from 756 radio locations obtained over the three years are presented & discussed with regard to seasonal movements, seasonal habitat use, selection of seasonal home ranges, selection of forest cover types within home ranges, annual variation in habitat use, and population characteristics (mortality, population density). Based on the results, recommendations are made regarding caribou management and further research."--Publisher's description.
Download or read book Habitat Selection Forty Mile Caribou in the Dawson Region Late Winter written by Oliver Emerson Barker and published by . This book was released on 2012 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using late-winter aerial survey data from 2008 and 2010, we modeled late winter habitat selection by Forty Mile caribou in the Dawson region. We then extrapolated model results beyond the study area, to predict selection patterns under scenarios of future winter range expansion.
Download or read book Factors Influencing the Distribution of Bathurst Barren ground Caribou Rangifer Tarandus Groenlandicus During Winter written by Tara A. Barrier and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Across the circumpolar north, many herds of Rangifer have decreased in abundance. In the Canadian central Arctic, the Bathurst herd of barren-ground caribou (Rangifer tarandus groenlandicus) declined from 472,000 ± 72,900 (± 95% confidence interval) caribou in 1986 to 31,900 ± 10,900 caribou in 2009 ...A reduction in winter forage due to forest fires has been suggested as a factor contributing to the decline. I employed a multi-scale study design to identify the influence of vegetation, fire history, snow cover, and predation risk on the occupancy of winter habitats by Bathurst caribou. Between 2008 and 2009, I collected forest stand and understory data at habitats used by caribou, as well as paired control sites. At a larger spatial scale, I used animal location data recorded from 1996 - 2009 to characterize the spatial and temporal distribution of Bathurst caribou on the winter range. At the scale of the feeding patch, caribou foraged in habitats with a high-percentage ground cover, high biomass of lichen, and few or small trees. Similarly, the consensus among the models of habitat selection was that collared caribou avoided areas of the winter range with a high density of burns and favoured older patches of forest characterized by a high percentage of ground cover of lichen and herbaceous forage and a close proximity to lakes and rivers. However, there was considerable use of habitats adjacent to the burn boundary, and some caribou occupied early-seral habitats significantly more than expected. Although the abundance of fruticose (having branched, shrubby thalli) lichens was relatively high (2464 kg/ha) in areas burned within the last 43 - 264 years, my results suggest that an increased incidence and severity of forest fires due to climatic warming could cause a temporary decrease in the habitat available to the Bathurst caribou herd during winter. In the event that reduced lichen availability becomes a limiting or regulating factor for caribou, fire suppression may be necessary to mitigate.
Download or read book Seasonal Movements and Habitat Selection by Woodland Caribou in the Wolverine Herd North central British Columbia Phase 2 written by and published by . This book was released on 1999 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Omineca Mountains Woodland Caribou Project was initiated in 1991 to provide detailed information on a caribou population residing on the west side of Williston Reservoir, British Columbia. This report presents results of phase 2 of the Project, which focussed on the use of forested habitat & seasonal movement patterns by caribou of the Wolverine Herd, 1994-97. The report begins with background on the characteristics of the study area and the research methods used, which included capture & radio collaring of 27 caribou, monitoring of the collared caribou by radio telemetry during radio tracking flights during summer & winter, habitat analyses based on forest cover maps, and statistical analyses of correlations between caribou locations & habitat type. Results from 756 radio locations obtained over the three years are presented & discussed with regard to seasonal movements, seasonal habitat use, selection of seasonal home ranges, selection of forest cover types within home ranges, annual variation in habitat use, and population characteristics (mortality, population density). Based on the results, recommendations are made regarding caribou management and further research.
