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Thermal Ecology Of The Northern Pacific Rattlesnake Crotalus Oreganus In The Shrub Steppe Of Washington State
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Book Synopsis Thermal Ecology of the Northern Pacific Rattlesnake (crotalus Oreganus) in the Shrub-steppe of Washington State by : Caleb Lee Loughran
Download or read book Thermal Ecology of the Northern Pacific Rattlesnake (crotalus Oreganus) in the Shrub-steppe of Washington State written by Caleb Lee Loughran and published by . This book was released on 2014 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Structure and Growth Rates of Northern Pacific Rattlesnakes in the Methow Valley, Washington by : Raymund Joseph Geroso
Download or read book Population Structure and Growth Rates of Northern Pacific Rattlesnakes in the Methow Valley, Washington written by Raymund Joseph Geroso and published by . This book was released on 2014 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Ecology of the Northern Pacific Rattlesnake, Crotalus Viridis Oreganus, in British Columbia by : James Malcolm Macartney
Download or read book The Ecology of the Northern Pacific Rattlesnake, Crotalus Viridis Oreganus, in British Columbia written by James Malcolm Macartney and published by . This book was released on 1985 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Use and Movement Patterns of the Northern Pacific Rattlesnake (Crotalus O. Oreganus) in British Columbia by :
Download or read book Habitat Use and Movement Patterns of the Northern Pacific Rattlesnake (Crotalus O. Oreganus) in British Columbia written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The selective use of habitat is a fundamental aspect of ecology, and differential patterns of habitat use reflect the underlying cues that guide selection. I assessed the habitat use and movement patterns of Northern Pacific Rattlesnakes (Crotalus o. oreganus) during the summers of 2005 and 2006 near Kamloops British Columbia, Canada. Contrary to my expectations, rattlesnakes used upper - elevation forested habitat when available and traveled farther from the den than previously reported for this species. Though the distance and orientation of travel differed among individuals, there was an apparent trend for snakes from one site to travel farther from the den than snakes from a second site. Snakes often were associated with structurally stable cover objects and small mammal sign in microhabitats with less canopy cover than otherwise available. Results from this study have implications for management and conservation of the Northern Pacific Rattlesnake.
Book Synopsis Habitat Suitability and Selection of Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus) at Multiple Spatial Scales by : Lee Joseph Hecker
Download or read book Habitat Suitability and Selection of Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus) at Multiple Spatial Scales written by Lee Joseph Hecker and published by . This book was released on 2015 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat modeling techniques are widely used to determine where species occur on the landscape and what habitat or environmental factors influence their presence. These techniques are particularly useful for rattlesnakes, which have life history traits that make them difficult to study in the field. Additionally, rattlesnakes like the northern Pacific rattlesnake (Crotalus oreganus oreganus) occupy a widespread and diverse range, making their environmental constraints difficult to determine. I used MaxEnt to create an environmental niche model (ENM) at two spatial scales to estimate where the suitable habitat for this species occurs in the Pacific Northwest and, more specifically, in coastal northern California. My results indicate selection for warmer habitats throughout the Pacific Northwest and drier environments within coastal northern California. I also examined the selection of a key aspect of the habitat of C. o. oreganus, the hibernaculum. I used a paired resource selection function to determine microhabitat differences between rocky outcrops used as hibernacula and outcrops that are visually similar, but unoccupied by the rattlesnakes. My top models reveal selection for outcrops with more crevices, fewer cover objects, and slopes facing due south (180° from North) for use as hibernacula. Additionally, temperatures loggers deployed at the hibernacula and their paired sites revealed that hibernacula are consistently warmer, particularly when rattlesnakes emerge in the spring. Lastly, I mapped the landslide activity within the vicinity of the hibernacula, which revealed a positive correlation between landslide presence and hibernacula. Combining these observations with the results of my models paint a comprehensive picture of where the suitable habitat for C. o. oreganus occurs in the Pacific Northwest.
Book Synopsis Habitat Use and Movement Patterns of the Northern Pacific Rattlesnake (Crotalus O. Oreganus) in British Columbia by : Liumila Michelle Gomez
Download or read book Habitat Use and Movement Patterns of the Northern Pacific Rattlesnake (Crotalus O. Oreganus) in British Columbia written by Liumila Michelle Gomez and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Disturbance on the Northern Pacific Rattlesnake (Crotalus Oreganus Oreganus) in British Columbia by : Emily V. Lomas
Download or read book Effects of Disturbance on the Northern Pacific Rattlesnake (Crotalus Oreganus Oreganus) in British Columbia written by Emily V. Lomas and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The indirect effects of anthropogenic disturbances on wildlife are relatively difficult to detect, much less study, yet understanding these more subtle influences are particularly critical for the conservation of species-at-risk. In this study, I used radio-telemetry and mark-recapture methods to investigate the indirect effects of human disturbance and habitat development on the body characteristics, behaviour, and spatial ecology of a population of rattlesnakes (a threatened species) in Osoyoos, British Columbia. I collected data in 2010 and 2011 to augment a data set spanning 2002 to 2012. Individuals in highly disturbed landscapes had lower body condition than snakes in other areas, and lost body weight over the foraging season. Strong trends in spatial ecology parameters across disturbance gradients were not apparent, although snakes in disturbed sites tended to have smaller core areas, shorter range lengths, and took a greater number of days to travel a given distance than snakes in less-disturbed habitat. No major differences were observed in snake behaviour, exposure risk, or other spatial ecology parameters among habitats under different disturbance pressures. Wildlife managers can apply the results of this study to put recovery goals into action for the Northern Pacific Rattlesnake. The findings also contribute to our understanding of how wildlife may be impacted in discrete ways within disturbed habitat, and highlight the importance of using multiple indicators to assess stability of animal populations.
Book Synopsis Effects of Distrubance on the Northern Pacific Rattlesnake (crotalus Oreganus Oreganus) in British Columbia by : Emily V. Lomas
Download or read book Effects of Distrubance on the Northern Pacific Rattlesnake (crotalus Oreganus Oreganus) in British Columbia written by Emily V. Lomas and published by . This book was released on 2013 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :M. Brent (Michael Brent) Charland Publisher :Wildlife Branch, Ministry of Environment, Lands and Parks ISBN 13 :9780772617231 Total Pages :18 pages Book Rating :4.6/5 (172 download)
Book Synopsis Status of the Northern Pacific Rattlesnake in British Columbia by : M. Brent (Michael Brent) Charland
Download or read book Status of the Northern Pacific Rattlesnake in British Columbia written by M. Brent (Michael Brent) Charland and published by Wildlife Branch, Ministry of Environment, Lands and Parks. This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Influences on Summer Habitat Use by Western Rattlesnakes (Crotalus Oreganus) in British Columbia by : Jessica Ann Harvey
Download or read book Thermal Influences on Summer Habitat Use by Western Rattlesnakes (Crotalus Oreganus) in British Columbia written by Jessica Ann Harvey and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of thermal features to habitat selection by terrestrial ectotherms such as reptiles has been well documented, but rarely has it been considered in larger-scale analyses of habitat use and selection, such as those routinely conducted using more-standard habitat features such as vegetation types and physical structure. Selection of habitat based on thermal attributes may be of particular importance for ectothermic species, especially in colder climates. In British Columbia, Canada, Western Rattlesnakes ( Crotalus oreganus) reach their northern limits. While commonly associated with low-elevation grasslands and open Ponderosa pine habitats, recent work indicates that some populations of these animals may use higher-elevation Douglas-fir forests. The reasons and implications for this strik ing contrast of habitat use patterns by these animals was the subject of this thesis. I investigated the reason(s) for this phenomenon by monitoring the migratory movements of 35 snakes away from 10 di fferent den sites, and comparing it to thermal landscape GIS maps generated for different periods of the active season. My work confirmed that dichotomous habitat use by denning populations of these snakes occurs throughout much of their range, and rattlesnakes in this region can no longer be strictly associated with grassland habitat. I found that snakes utilizing the higher-elevation forests not only moved relatively further during the course of their annual migrations, but were also more likely to use warmer areas of the landscape during their annual migration. In addition to thermal benefits, prey availability and/or outbreeding may be at least partially responsible for these patterns, but at this time there is limited data to test these alternative hypotheses. Regardless, snakes utilizing the higher-elevation forests had better body condition, indicating a definite advantage to this strategy . On a smaller scale, thermoregulatory behaviours appear to be less constrained by thermal factors in forest habitats, potentially allowing forest snakes increased time for hunting and travelling. Insight into these and other behavioural differences between neighbouring rattlesnake populations will allow managers to tailor management strategies to specific dens. Finally, the local and landscape scale patterns I detected have obvious repercussions for snakes in the event climate change produces shifting ecosystem boundaries and thermal regimes.
Author :Donald A. Blood Publisher :Province of British Columbia, Ministry of Environment, Lands and Parks ISBN 13 :9780772674654 Total Pages :1 pages Book Rating :4.6/5 (746 download)
Book Synopsis Western Rattlesnake by : Donald A. Blood
Download or read book Western Rattlesnake written by Donald A. Blood and published by Province of British Columbia, Ministry of Environment, Lands and Parks. This book was released on 1993 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of a series that profiles various blue-listed species considered biologically "vulnerable" in British Columbia. Explains what these species look like, how they reproduce, what they eat, where they live, why they are at risk, and what the public can do to help.
Book Synopsis Analysis of the Molecular Basis of Coevolution Between California Ground Squirrels (Otospermophilus Beecheyi) and Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus) by : Alyssa Hassinger
Download or read book Analysis of the Molecular Basis of Coevolution Between California Ground Squirrels (Otospermophilus Beecheyi) and Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus) written by Alyssa Hassinger and published by . This book was released on 2020 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the molecular basis of adaptations in coevolving species is an important goal of evolutionary biology. Venom in predators and venom resistance proteins in prey are examples of such coevolving molecular phenotypes. In my thesis, I investigate two molecular traits that are important in coevolutionary interactions between the northern Pacific rattlesnake (Crotalus oreganus oreganus) and its primary prey item, the California ground squirrel (Otospermophilus beecheyi). In Chapter 1, I briefly introduce the topics of my thesis research by reviewing how population-level variation in venom protein composition and metalloprotease activity has been established in C. o. oreganus and that there is evidence of O. beecheyi evolving resistance in response to the sympatric predator. In Chapter 2, I further characterize venom activity through in vitro tests of enzymatic activity to assess functional differences between 12 populations of C. o. oreganus and investigate what the possible causes of this variation might be. My results support the conclusions of other studies that there is population-level variation in venom function but the proximate and ultimate causes for this functional variation remain unclear. In Chapter 3, I generate a transcriptome for O. beecheyi and run this transcriptome through a series of filters to identify genes that code for potential venom resistance proteins. My work provides a reference transcriptome for future work and I identify 5 proteins that pass all filters for potential resistance proteins. Overall, my thesis provides more detail on functional variation within rattlesnakes and lays out a genetic framework for the evolution of resistance proteins within ground squirrels. In combination my work sets the stage for future detailed work focused on understanding coevolutionary interactions at the molecular level between ground squirrels and rattlesnakes.
Book Synopsis An Examination of Factors Influencing First-year Recruitment in the Northern Pacific Rattlesnake, Crotalus Viridis Oreganus, in British Columbia [microform] by : M. Brent (Michael Brent) Charland
Download or read book An Examination of Factors Influencing First-year Recruitment in the Northern Pacific Rattlesnake, Crotalus Viridis Oreganus, in British Columbia [microform] written by M. Brent (Michael Brent) Charland and published by National Library of Canada. This book was released on 1987 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Linking Landscape Disturbance to the Population Ecology of Great Basin Rattlesnakes (Crotalus Oreganus Lutosus) in the Upper Snake River Plain by : Christopher L. Jenkins
Download or read book Linking Landscape Disturbance to the Population Ecology of Great Basin Rattlesnakes (Crotalus Oreganus Lutosus) in the Upper Snake River Plain written by Christopher L. Jenkins and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sagebrush steppe ecosystems throughout the Great Basin and Interior Columbia Basin are experiencing widespread landscape conversion due to livestock overgrazing, invasive plants, and fire. Previous studies have documented the effects of landscape conversion on birds and mammals but there is little information on the effects on reptiles. The Great Basin rattlesnake is a good species to study the potential influence of landscape conversion on reptiles because they are widely distributed, sympatric with many other species of reptiles, move long distances relative to other reptiles, and have life histories that are sensitive to variation in prey availability. We developed a study that links landscape disturbance to rattlesnake populations through a series of trophic interactions. We studied disturbance, substrate, vegetation, prey, and rattlesnakes at two study sites in the Upper Snake River Plain of southeastern Idaho.
Book Synopsis Effects of Supplemental Hydration on Physiology and Behavior of Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus) by : Griffin Dale Capehart
Download or read book Effects of Supplemental Hydration on Physiology and Behavior of Northern Pacific Rattlesnakes (Crotalus Oreganus Oreganus) written by Griffin Dale Capehart and published by . This book was released on 2015 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: These results suggest that hydration may have a profound influence on reproduction and has the potential to affect body condition and thermoregulation. The lack of an effect on movement and stress physiology should not be overlooked, however. This study is the first to experimentally manipulate hydration in free-ranging rattlesnakes and one of the few to manipulate hydration in vertebrates. More studies are needed to support a pivotal role of hydration in physiology and behavior of reptiles and we encourage the use of experimental field manipulations to answer these questions.
Book Synopsis The Importance of the Facial Pit of the Northern Pacific Rattlesnake (Crotalus Viridis Oreganus) Under Natural Conditions in Southern British Columbia by : William Burton Preston
Download or read book The Importance of the Facial Pit of the Northern Pacific Rattlesnake (Crotalus Viridis Oreganus) Under Natural Conditions in Southern British Columbia written by William Burton Preston and published by . This book was released on 1964 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Survey of the Distribution, Biology and Population Trends of the Northern Pacific Rattlesnake, Crotalus Viridia Oreganus, in British Columbia by : Michael Brent Charland
Download or read book A Survey of the Distribution, Biology and Population Trends of the Northern Pacific Rattlesnake, Crotalus Viridia Oreganus, in British Columbia written by Michael Brent Charland and published by . This book was released on 1991 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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