Download or read book Landscape Genetics of Black Bears Ursus Americanus on the Kenai Peninsula Alaska written by Stacie Joy Robinson and published by . This book was released on 2007 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Genetic Structure Among Black Bears Ursus Americanus in Kenai Fjords National Park and the Kenai Peninsula Alaska written by Stacie J. Robinson and published by . This book was released on 2007 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Genetic and Behavioral Studies of Black Bears Ursus Americanus in Southeast Alaska written by and published by . This book was released on 2006 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: I studied population, genetic and behavioral aspects of black bear ( Ursus americanus) in the temperate rainforest of Southeast Alaska. At a landscape level, I used population genetics to investigate black bear movement in the Alexander Archipelago and mainland of Southeast Alaska. I found that geographic structure defined by salt water and glaciers curtails black bear movement, to the extent that most regions have significantly genetically differentiated black bear populations. I found that black bears in Southeast Alaska cluster into seven genetic types. I also found that two larger, nuclear genetic clusters of black bears in Southeast Alaska correspond, geographically, to the two ancient mitochondrial lineages of black bears. This perhaps indicates that the nuclear genome retains a genetic signature of the secondary contact of these two lineages. I also studied black bear vagility on a much smaller scale---at the level of riparian areas of salmon spawning streams. I used genetic tagging to demonstrate that the group of bears using these streams is in demographic flux throughout the course of the salmon stream, and that a high number of individual bears use these streams. The persistence of intact salmon streams in Southeast Alaska likely contributes to high black bear population density. In a final aspect of my dissertation research, I used tetracycline biomarking to estimate the population size of black bears on Kuiu Island to be 1.5 bears/km2. This estimate is among the highest recorded bear densities.
Download or read book Population Ecology of the Kenai Peninsula Black Bear written by Charles C. Schwartz and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports the objective of which were to determine the population density, age structure, productivity and survival of the black bear (Ursus americanus) population in the Moose Research Center and Swanson River-Finger lakes study areas of the Kenai Peninsula (southcentral Alaska).
Download or read book Landscape Genetics of Black Bears Ursus Americanus in the Northern Lower Peninsula NLP of Michigan USA written by Hope M. Draheim and published by . This book was released on 2015 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shoreline Distribution and Landscape Genetics of Bears in a Recently Deglaciated Fjord written by Tania M. Lewis and published by . This book was released on 2012 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: To further knowledge of mammalian colonization patterns following deglaciation, I used occupancy modeling to estimate black and brown bear shoreline distribution of Glacier Bay and how these distributions relates to the number years of land exposure and post glacial plant and stream succession. I also conducted microsatellite genetic analysis of brown bear hair and tissue to determine contemporary population structure throughout the park and how it relates to landscape features and surrounding populations. Closed forest cover within 1 km of the study site was a strong positive predictor of black bear occurrence. Brown bears were detected at 100% of sites although their use was highest in recently glaciated and old growth forest areas, and lowest in young forests. The shoreline of Glacier Bay hosts brown bears from three geographically overlapping distinct populations, one of which is likely composed of the original colonizers following glacial retreat that were isolated long enough to undergo genetic drift. The southern portion of Glacier Bay fjord and the Fairweather Mountain range are barriers to dispersal. Evidence of range expansion and recent migration indicate that brown bears are still actively colonizing Glacier Bay.
Download or read book The Importance of Multiple Study Areas in Landscape Genetics written by Ruth Short Bull and published by . This book was released on 2010 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: I used individual-based landscape genetics analyses in 12 study areas in western Montana and northern Idaho to assess the influence of landscape features on gene flow among American black bears (Ursus americanus). I compared the influence of landscape features among the study areas, tested the effect of reducing the number loci on support for landscape genetic models, and examined possible explanations of why different landscape features were supported in the different study areas. To determine the influence of landscape features on gene flow, I examined the relationship between pair-wise genetic distances and ecological (cost) distances between individuals in each study area by applying a similar landscape genetic modeling approach as Cushman et al. (2006). Tests of isolation by distance (IBD) after removing landscape effects were non-significant in nearly all study areas. Five study areas had significant landscape genetic models (p 0.04) resulted in different significant landscape features using subsets of loci. The results suggest that researchers should subsample loci and use relatively low p-values (p
Download or read book The Conservation Genetics of the Brown Bear Ursus Arctos L of the Kenai Peninsula South Central Alaska written by James Vincent Jackson and published by . This book was released on 2003 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Bears of Alaska in Life and Legend written by Jeff Rennicke and published by . This book was released on 1987 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Looks at three species of bear inhabiting Alaska, the black bear, the grizzly bear and the polar bear, through the legends and artifacts of the native people and through the research work of scientists.
Download or read book Black Bear Predation on Moose written by Charles C. Schwartz and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports the objective of which were to determine the population density, age structure, productivity of black bear (Ursus americanus) populations as well as seasonal movements and habitat usage relative to moose (Alces alces) calving areas at Moose River Flats and Willow Lake areas of the Kenai Peninsula (southcentral Alaska).
Download or read book Black Bear Predation on Moose bear Ecology Studies written by Charles C. Schwartz and published by . This book was released on 1983 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dominion of Bears written by Sherry Simpson and published by University Press of Kansas. This book was released on 2013-10-18 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long ago we invited bears into our stories, our dreams, our nightmares, our lives. We have always sought them out where they live, for their hides, their meat, their beauty, their knowingness. Human country and bear country exist side by side. As Sherry Simpson suggests, the relationship between bears and humans is ancient and ongoing and, in Alaska, profoundly and often uncomfortably close. A huge number of North America’s bears live in Alaska: including at least 31,000 brown bears, 100,000 black bears, and 3,500 polar bears. And nearly every aspect of Alaskan society reflects their presence, from hunting to tourism marketing to wildlife management to urban planning. A long-time Alaskan, Simpson offers a series of compelling essays on Alaskan bears in both wild and urban spaces—because in Alaska, bears are found not only in their natural habitat but also in cities and towns. Combining field research, interviews, and a host of up-to-date scientific sources, her finely polished prose conveys a wealth of information and insight on ursine biology, behavior, feeding, mating, social structure, and much more. Simpson crisscrosses the Alaskan landscape in pursuit of bears as she muses, marvels, and often stands in sheer awe before these charismatic creatures. Firmly grounded in the expertise of wildlife biologists, hunters, and viewing guides, she shows bears as they actually are, not as we imagine them to be. She considers not only the occasionally aggressive behavior bears need to survive, but also the violence exacted upon them by trophy hunters, advocates of predator control, or suburbanites who view bears as land sharks that threaten the safety of their families. Shifting effortlessly between fascinating facts and poetic imagery, Simpson crafts an extended meditation on why we are so drawn to bears and why they continue to engage our imaginations, populate indigenous mythologies, and help define our essential visions of wilderness. As Simpson observes, “The slightest evidence that bears share your world—or that you share theirs—can alter not only your sense of the landscape, but your sense of yourself within that landscape.”
Download or read book Patterns in Landscape wide Spatial Heterogeneity of American Black Bear Ursus Americanus Populations Identified Through Genetic and Noninvasive Approaches written by Catherine Sun and published by . This book was released on 2019 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population-level patterns reflect the aggregation of individual-level movement, survival, and recruitment processes over a landscape. Estimating population density, distribution, and genetic structure is important for understanding species ecology, monitoring viability, and for developing effective management plans. Long-term monitoring is particularly necessary for detecting changes that have management implications. However, limited resources often impede the collection of sufficient high-resolution demographic data for robust population-level inferences, especially for species with extensive distributions and large ranges of individual movement. The American back bear (Ursus americanus) is a game species in New York (NY) that has been growing in abundance and expanding in distribution. However, robust knowledge of spatial variation in population density or genetic structure informative about current and future population trajectories is lacking. This research estimated patterns of landscape-wide spatial heterogeneity in NY bear populations using noninvasive, cost-efficient methods. First, I investigated the genetic structure of bears in NY and across the northeastern United States using neutral markers to reveal differentiation and patterns of restricted gene flow that may pre-date historical human disturbances. Genetic connectivity across political borders supports previous hypotheses of bear movement that motivate continued monitoring and coordination between management units. Second, I developed a citizen science (CS) program and conducted simulations with a novel integrated model to assess the utility of opportunistic CS data in augmenting systematic data to estimate population parameters. Then, I estimated bear density and patterns in bear density, distribution, and occupancy related to landcover types in southern NY with systematic spatial capture-recapture, occupancy, and CS approaches from 2015-2018. Across years, mean predicted density was 7.3 bears /100 km2 (95% CI: 4.7 - 11.5) with population growth, survival, fecundity, and landcover patterns suggesting that bears may continue to expand into areas with more human-impacted landscapes. Accounting for dependence between collocated sampling methods increased overall detection probability and highlighted the importance of appropriate spatial scales of different sampling methods for inference on population density. These findings provide the first spatially explicit, non-harvest based estimates of black bear population patterns across southern NY, and offer insights into the design of large scale, multi-method, long term population monitoring.
Download or read book Identifying Landscape wide Spatial Heterogenity in Population Density and Genetic Sturcture of American Black Bear Ursus Americanus in New York and the Northeastern United States written by Catherine Sun and published by . This book was released on 2019 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population-level patterns reflect the aggregation of individual-level movement, survival, and recruitment processes over a landscape. Estimating population density, distribution, and genetic structure is important for understanding species ecology, monitoring viability, and for developing effective management plans. Long-term monitoring is particularly necessary for detecting changes that have management implications. However, limited resources often impede the collection of sufficient high-resolution demographic data for robust population-level inferences, especially for species with extensive distributions and large ranges of individual movement. The American back bear (Ursus americanus) is a game species in New York (NY) that has been growing in abundance and expanding in distribution. However, robust knowledge of spatial variation in population density or genetic structure informative about current and future population trajectories is lacking. This research estimated patterns of landscape-wide spatial heterogeneity in NY bear populations using noninvasive, cost-efficient methods. First, I investigated the genetic structure of bears in NY and across the northeastern United States using neutral markers to reveal differentiation and patterns of restricted gene flow that may pre-date historical human disturbances. Genetic connectivity across political borders supports previous hypotheses of bear movement that motivate continued monitoring and coordination between management units. Second, I developed a citizen science (CS) program and conducted simulations with a novel integrated model to assess the utility of opportunistic CS data in augmenting systematic data to estimate population parameters. Then, I estimated bear density and patterns in bear density, distribution, and occupancy related to landcover types in southern NY with systematic spatial capture-recapture, occupancy, and CS approaches from 2015-2018. Across years, mean predicted density was 7.3 bears /100 km2 (95% CI: 4.7 - 11.5) with population growth, survival, fecundity, and landcover patterns suggesting that bears may continue to expand into areas with more human-impacted landscapes. Accounting for dependence between collocated sampling methods increased overall detection probability and highlighted the importance of appropriate spatial scales of different sampling methods for inference on population density. These findings provide the first spatially explicit, non-harvest based estimates of black bear population patterns across southern NY, and offer insights into the design of large scale, multi-method, long term population monitoring.
Download or read book A Fragile Beauty written by Theodore Catton and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Watchable Wildlife written by Lynn L. Rogers and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Ecology of the Kenai Peninsula Black Bear written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
