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Curious Case Of The Coastal Tailed Frog Ascaphus Truei Near The Northern Extent Of Its Range
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Book Synopsis Curious Case of the Coastal Tailed Frog (ascaphus Truei) Near the Northern Extent of Its Range by : Cherie Marie Mosher
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.
Book Synopsis Life History of the Coastal Tailed Frog (Ascaphus Truei) Across an Elevational Gradient by : Adrian Daniel Macedo
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.
Book Synopsis The Habitat Ecology of the Post-metamorphic Coastal Tailed Frog (Ascaphus Truei). by : Alexandria L. McEwan
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 2015 with total page 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 (11-12C). 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.
Book Synopsis Life History of Post-metamorphic Tailed Frogs (Ascaphus Truei) in North Coastal California by : Laura L. Burkholder
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:
Book Synopsis Dispersion of Coastal Tail Frog (Ascaphus Truei) by :
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:
Book Synopsis COSEWIC Assessment and Status Report on the Coastal Tailed Frog, Ascaphus Truei, in Canada by :
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:
Book Synopsis Tailed Frog by : British Columbia. Ministry of Environment, Lands, and Parks
Download or read book Tailed Frog written by British Columbia. Ministry of Environment, Lands, and Parks and published by . This book was released on 2001 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phylogeography of the Tailed Frog (Ascaphus Truei) by : Marilyn K. Nielson
Download or read book Phylogeography of the Tailed Frog (Ascaphus Truei) written by Marilyn K. Nielson and published by . This book was released on 2000 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Management Plan for the Coastal Tailed Frog (Ascaphus Truei) in British Columbia by : Linda Anne Dupuis
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:
Book Synopsis COSEWIC Assessment and Status Report on the Rocky Mountain Tailed Frog (Ascaphus Montanus) in Canada by :
Download or read book COSEWIC Assessment and Status Report on the Rocky Mountain Tailed Frog (Ascaphus Montanus) in Canada written by and published by . This book was released on 2013 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Distribution and Ecology of the Tailed Frog, Ascaphus Truei Stejnger, in California by : R. Bruce Bury
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:
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:
Book Synopsis Coastal Tailed Frog Methodology by :
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:
Book Synopsis Pre-hatching Stages of the Tailed Frog, (Ascaphus Truei) (Stejnegar) by : James George Wernz
Download or read book Pre-hatching Stages of the Tailed Frog, (Ascaphus Truei) (Stejnegar) written by James George Wernz and published by . This book was released on 1966 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Description of anuran larvae with the use of staging tables is a common practice in the study of frog life-histories, but there has been no previous description or table of Ascaphus larvae. In comparing Ascaphus larvae to a simplified staging table for anurans it was found that these larvae vary considerably from those of other anurans. Five stages had to be eliminated (Fertilization, Grey Crescent, Neural Plate, Gill Circulation, and Cornea Transparent) and five new ones created (Deposition, Neural Groove, Eye Pigmentation, Body Pigmentation, and Hatching). The final result was a series of twenty-one stages, from Deposition through Hatching, through which the growth and development of the larvae could be traced and which will, it is hoped, facilitate discussion of larval Ascaphus in any further studies. Determination of tadpole food habits through stomach and intestinal content samples was largely unsuccessful.
Book Synopsis A Plague of Frogs by : William Souder
Download or read book A Plague of Frogs written by William Souder and published by Hyperion Books. This book was released on 2000-03-15 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the tradition of "The Hot Zone" comes an explosive investigation into a global catastrophe in the making. Moving from America's swamps and wetlands to laboratories and government back rooms, Souder dramatically reveals the warning implicit in an outbreak of mutated frogs, explaining the importance of the amphibians to our fragile ecosystems and suggesting what their possible extinction means to the habitability of the planet for all species, including the human race.
Book Synopsis In Search of Lost Frogs by : Robin Moore
Download or read book In Search of Lost Frogs written by Robin Moore and published by . This book was released on 2014-08-09 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: On August 9, 2010, 33 teams from 21 countries were dispatched to search for the Lost Frogs identified by Conservation International. On their list were a host of species including, in the top ten most wanted, the Rio Pescado Stubfoot Toad, found only in Ecuador - which was to prove a triumphant rediscovery. Several months, a number of key rediscoveries - such as the Elegant Tropical Frog, last seen in 1937 and the Chalazodes Bubble-nest Frog - last seen in 1874 and two new species later, the Search for Lost Frogs had generated more than 650 news articles in 20 countries and over a billion potential viewers. Author Robin Moore was responsible for spearheading the Search for Lost Frogs and coordinating the teams. He also co-led two expeditions to Colombia and Haiti. In Colombia in search of the Mesopotamia Beaked Toad, the steamy jungles of the Choco yielded not the desired species but a brand new one - the Mr. Burns Toad, so-called because of an uncanny resemblance to the Simpsons' character; the species was selected as one of Time magazine's top ten new species of 2010. In Haiti the team found six frogs last seen 20 years before, including the Ventriloqual Frog, named for its ability to throw its voice. This fascinating new book tells the story of the expedition - its highs and lows, discoveries and failures and the campaign's ongoing work. Despite the campaign, one third of the world's amphibians remain threatened with extinction. Most of the species searched for were not found. But those that were provide a glimmer of hope. Understanding why these species have survived when many others have not should help us understand what makes these species different. "In Search of Lost Frogs" is a story of perseverance, disappointment, rediscovery, resilience, but ultimately of hope, written with passion and illustrated with the author's superb photographs.
Book Synopsis Factors Influencing Rocky Mountain Tailed Frog (Ascaphus Montanus) Distribution and Abundance by : Jason Leon Jones
Download or read book Factors Influencing Rocky Mountain Tailed Frog (Ascaphus Montanus) Distribution and Abundance written by Jason Leon Jones and published by . This book was released on 2006 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
