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Author :
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ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (695 download)
Download or read book Coastal Tailed Frog Methodology written by and published by . This book was released on 2010 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexandria L. McEwan
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book The Habitat Ecology of the Post-metamorphic Coastal Tailed Frog (Ascaphus Truei) written by Alexandria L. McEwan and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coastal tailed frog (Ascaphus truei) has a biphasic life-history that includes the use of high-elevation streams and adjacent old growth forests. This species is at risk from a variety of land-use activities that result in younger and more fragmented terrestrial habitats. I investigated the fine-scale spatial ecology of post-metamorphic tailed frog populations as revealed by seasonal variation in activity and movement. I used an Information Theoretic Model Comparison approach to relate tailed frog captures in pitfall traps to sets of explanatory factors and infer habitat use by adult tailed frogs located with VHF radio transmitters. Trap data suggested that variation in the relative abundance and distribution was attributed to time of year, associated with reproductive activity; seasonal trends in local climate; canopy closure; and distance to the larval stream. The most parsimonious logistic regression model for both years of trapping data demonstrated ‘good’ predictability (Area Under the Curve (AUC) > 0.7). Data from 24 tailed frogs with radio transmitters (8 males, 16 females) fitted to a resource selection function suggested that tailed frogs were positively associated with habitats containing decayed coarse woody debris (CWD), less light, adjacency to the larval stream, wet site types, and cool temperatures (11-12°C). When compared to males, females were more selective in their choice of habitat (AUC > 0.7). Overall, the relationship between distribution and activity of tailed frogs was reflective of reproductive phenology in combination with micro-site or broader climatic conditions. Thus, habitat protections should reflect the behavior and habitat of the species as it varies across spatiotemporal scales.
Author : Lauren Smith (Dissertant)
Publisher :
ISBN 13 :
Total Pages : 63 pages
Book Rating : 4.:/5 (119 download)
Download or read book Seasonal Comparison of Environmental DNA and Traditional Sampling Techniques for Detecting Coastal Tailed Frogs (Ascaphus Truei) in Northern California written by Lauren Smith (Dissertant) and published by . This book was released on 2017 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: While environmental DNA (eDNA) sampling has been shown to provide higher detection rates for aquatic amphibians compared to traditional sampling, the effect of season and stream characteristics on the efficacy of eDNA sampling remains unclear. The pH, turbidity, water temperature, and flow rate of streams may affect eDNA concentrations, and consequently influence detection rate. The purpose of this research was to (1) compare the detection rates of eDNA and traditional sampling techniques during different seasons, (2) observe the effects of stream characteristics on eDNA concentrations, and (3) review the relationship between animal abundance and eDNA concentrations at specific sampling sites. I used eDNA and traditional sampling techniques to detect coastal tailed frogs (Ascaphus truei) in cold, fast-moving streams. At three streams in northern California, we performed a "rubble rousing" technique and collected eDNA water samples every 100m during summer, fall, and winter. Water temperature, pH, flow rate, and turbidity data were collected from each stream. Detection rates for eDNA sampling (≥94%) were higher than those for traditional sampling (≤91%) when stream data was combined during the summer and fall. During winter, the detection rate for traditional sampling was higher (91%) than that for eDNA sampling (58%). With season and water temperature excluded, flow rate had a significant, negative effect on eDNA concentrations, while higher eDNA concentrations were observed when eDNA sampling was performed in our largest stream. During summer and fall, a positive correlation between animal abundance and mean eDNA concentration was found for each stream, but not at specific sampling sites. Our findings indicate that mean eDNA concentrations found in streams can be used to monitor fluctuations in population size. Our results show that eDNA sampling is effective for monitoring tailed frogs during the spring and summer, but is not recommended for use during winter months due to increased flow rates.
Author : Cherie Marie Mosher
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (128 download)
Download or read book Curious Case of the Coastal Tailed Frog (ascaphus Truei) Near the Northern Extent of Its Range written by Cherie Marie Mosher and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ascaphus truei, an ancient species of frog, migrated into British Columbia, Canada, following the last ice age. A. truei is of conservation interest because forestry practices, and the associated infrastructure, may reduce habitat quality. There is also concern that a warmer and drier climate will change the distribution and abundance of this species. I used two genetic methods, microsatellites and next-generation sequencing, to compare the genetic diversity of A. truei from the northern extent of its range in British Columbia, CA to southern Washington, USA. Both methods suggested a dramatic reduction in diversity across the northern portion of the species' range. The phylogeography suggests a northern range expansion from a single refugium. I used DNA metabarcoding to compare the gut contents of larvae across three stream reaches and two development classes near the northern extent of A. truei's range. Gut contents differed between stream reach but did not differ among development class. Wetted width and ultimately stream volume may influence differences in gut content among stream reaches. I also quantified the relationship between an index of larvae density and environmental factors hypothesized to influence population density near the northern extent of the range. I assessed the segregation of larvae at various developmental stages. Wetted width and wetted depth correlated with differences in the abundance of larvae. Older developmental stages were captured in stream reaches with greater slopes than younger stages. Management should minimize modifications of stream structure, such as in-stream siltation due to road building. We should maintain habitat connectivity and gene flow to ensure the continued migration and adaptive capacity of A. truei.
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Publisher :
ISBN 13 : 9780660245379
Total Pages : 53 pages
Book Rating : 4.2/5 (453 download)
Download or read book Management Plan for the Coastal Tailed Frog (Ascaphus Truei) in Canada written by and published by . This book was released on 2018 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adrian Daniel Macedo
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (113 download)
Download or read book Life History of the Coastal Tailed Frog (Ascaphus Truei) Across an Elevational Gradient written by Adrian Daniel Macedo and published by . This book was released on 2019 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: I found that the larval period of A. truei in the Klamath Mountains of northern California ranges from two years in low and mid-elevations, to at least three years in high elevations. I also found decreased body size and increased growth rates of tadpoles with increasing elevation. Post-metamorphic frogs grew at similar rates as previously described coastal California populations. There was high site fidelity and significantly greater movement during the months of June and August in post-metamorphic animals. Frogs in the high elevations are capable of great longevity, with a maximum observed age estimated at eight years post-metamorphosis. The high elevation populations described here have the longest larval period documented in California. This study also provides the first field estimates of larval growth rates and the first longevity estimates of post metamorphic frogs in California. Future laboratory experiments will be necessary to separate phenotypic plasticity of life history traits from true genetic differences between A. truei populations in the Klamath Mountains of northern California, as potential explanations for the variation seen.
Author : Linda Anne Dupuis
Publisher :
ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (945 download)
Download or read book Management Plan for the Coastal Tailed Frog (Ascaphus Truei) in British Columbia written by Linda Anne Dupuis and published by . This book was released on 2015 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (761 download)
Download or read book Dispersion of Coastal Tail Frog (Ascaphus Truei) written by and published by . This book was released on 2006 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Laura L. Burkholder
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.:/5 (613 download)
Download or read book Life History of Post-metamorphic Tailed Frogs (Ascaphus Truei) in North Coastal California written by Laura L. Burkholder and published by . This book was released on 2005 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 : 9781100202129
Total Pages : pages
Book Rating : 4.2/5 (21 download)
Download or read book COSEWIC Assessment and Status Report on the Coastal Tailed Frog, Ascaphus Truei, in Canada written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Bruce Bury
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (319 download)
Download or read book Sampling Methods for Amphibians in Streams in the Pacific Northwest written by R. Bruce Bury and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 590 pages
Book Rating : 4.3/5 (555 download)
Download or read book Elliott State Forest written by and published by . This book was released on 2008 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (5 download)
Download or read book A Hierarchical Analysis of the Habitat Association of the Tailed Frog (Ascaphus Truei) in the Mixed Coniferous/hardwood Forests of Northwestern California written by and published by . This book was released on 1993 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Niko Balkenhol
Publisher : John Wiley & Sons
ISBN 13 : 1118525280
Total Pages : 294 pages
Book Rating : 4.1/5 (185 download)
Download or read book Landscape Genetics written by Niko Balkenhol and published by John Wiley & Sons. This book was released on 2015-11-09 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: LANDSCAPE GENETICS: CONCEPTS, METHODS, APPLICATIONS LANDSCAPE GENETICS: CONCEPTS, METHODS, APPLICATIONS Edited by Niko Balkenhol, Samuel A. Cushman, Andrew T. Storfer, Lisette P. Waits Landscape genetics is an exciting and rapidly growing field, melding methods and theory from landscape ecology and population genetics to address some of the most challenging and urgent ecological and evolutionary topics of our time. Landscape genetic approaches now enable researchers to study in detail how environmental complexity in space and time affect gene flow, genetic drift, and local adaptation. However, learning about the concepts and methods underlying the field remains challenging due to the highly interdisciplinary nature of the field, which relies on topics that have traditionally been treated separately in classes and textbooks. In this edited volume, some of the leading experts in landscape genetics provide the first comprehensive introduction to underlying concepts, commonly used methods, and current and future applications of landscape genetics. Consistent with the interdisciplinary nature of the field, the book includes textbook-like chapters that synthesize fundamental concepts and methods underlying landscape genetics (Part 1), chapters on advanced topics that deserve a more in-depth treatment (Part 2), and chapters illustrating the use of concepts and methods in empirical applications (Part 3). Aimed at beginning landscape geneticists and experienced researchers alike, this book will be helpful for all scientists and practitioners interested in learning, teaching, and applying landscape genetics.
Author : R. Bruce Bury
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (128 download)
Download or read book The Distribution and Ecology of the Tailed Frog, Ascaphus Truei Stejnger, in California written by R. Bruce Bury and published by . This book was released on 1967 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (366 download)
Download or read book Tailed Frogs written by and published by . This book was released on 1996 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : British Columbia. Ministry of Environment, Lands, and Parks
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (847 download)
Download or read book Tailed Frog (Ascaphus Truei). written by British Columbia. Ministry of Environment, Lands, and Parks and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
