Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Molecular Evidence For Historical And Recent Population Size Reductions Of Tiger Salamanders Ambystoma Tigrinum In Yellowstone National Park
Download Molecular Evidence For Historical And Recent Population Size Reductions Of Tiger Salamanders Ambystoma Tigrinum In Yellowstone National Park full books in PDF, epub, and Kindle. Read online Molecular Evidence For Historical And Recent Population Size Reductions Of Tiger Salamanders Ambystoma Tigrinum In Yellowstone National Park ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Molecular Evidence for Historical and Recent Population Size Reductions of Tiger Salamanders (Ambystoma Tigrinum) in Yellowstone National Park by : Stephen Spear
Download or read book Molecular Evidence for Historical and Recent Population Size Reductions of Tiger Salamanders (Ambystoma Tigrinum) in Yellowstone National Park written by Stephen Spear and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population declines caused by natural and anthropogenic factors can quickly erode genetic diversity in natural populations. In this study, we examined genetic variation within 10 tiger salamander populations across northern Yellowstone National Park in Wyoming and Montana, USA using eight microsatellite loci. We tested for the genetic signature of population decline using heterozygosity excess, shifts in allele frequencies, and low ratios of allelic number to allelic size range (M-ratios). We found different results among the three tests. All 10 populations had low M-ratios, ?ve had shifts in allele frequencies and only two had signi?cant heterozygosity excesses. These results support theoretical expectations of different temporal signatures among bottleneck tests and suggest that both historical ?sh stocking, recent, sustained drought, and possibly an emerging amphibian disease have contributed to declines in effective population size.
Book Synopsis Ancient DNA Assessment of Tiger Salamander Population in Yellowstone National Park by : Sarah K. McMenamin
Download or read book Ancient DNA Assessment of Tiger Salamander Population in Yellowstone National Park written by Sarah K. McMenamin and published by . This book was released on 2012 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent data indicates that blotched tiger salamanders (Ambystoma tigrinum melanostictum) in northern regions of Yellowstone National Park are declining due to climate-related habitat changes. In this study, we used ancient and modern mitochondrial haplotype diversity to model the effective size of this amphibian population through recent geological time and to assess past responses to climatic changes in the region. Using subfossils collected from a cave in northern Yellowstone, we analyzed .700 base pairs of mitochondrial sequence from 16 samples ranging in age from 100 to 3300 years old and found that all shared an identical haplotype. Although mitochondrial diversity was extremely low within the living population, we still were able to detect geographic subdivision within the local area. Using serial coalescent modelling with Bayesian priors from both modern and ancient genetic data we simulated a range of probable population sizes and mutation rates through time. Our simulations suggest that regional mitochondrial diversity has remained relatively constant even through climatic fluctuations of recent millennia.
Book Synopsis Evolutionary Conservation Genetics by : Jacob Höglund
Download or read book Evolutionary Conservation Genetics written by Jacob Höglund and published by Oxford University Press, USA. This book was released on 2009-03-05 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conservation genetics focuses on understanding the role of genetic variation for population persistence. This book is about the methods used to study genetic variation in endangered species and whether genetic variation matters in the extinction of species.
Book Synopsis Landscape and Yellowstone Amphibians by : Sarah Kelly McMenamin
Download or read book Landscape and Yellowstone Amphibians written by Sarah Kelly McMenamin and published by . This book was released on 2009 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Landscape Effects on Genetic Structure in Tiger Salamander (Ambystoma Tigrinum Melanostictum) Populations Across the Northern Range of Yellowstone National Park by : Stephen Spear
Download or read book Landscape Effects on Genetic Structure in Tiger Salamander (Ambystoma Tigrinum Melanostictum) Populations Across the Northern Range of Yellowstone National Park written by Stephen Spear and published by . This book was released on 2004 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Migratory Chronology of Adult Tiger Salamanders (Ambystoma Tigrinum) and Survey of Larvae of the Tiger Salamander in the Northern Range of Yellowstone National Park by : Steven Ralph Hill
Download or read book Migratory Chronology of Adult Tiger Salamanders (Ambystoma Tigrinum) and Survey of Larvae of the Tiger Salamander in the Northern Range of Yellowstone National Park written by Steven Ralph Hill and published by . This book was released on 1995 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Yellowstone Science written by and published by . This book was released on 2005 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Landscape Genetics of the Blotched Tiger Salamander (Ambystoma Tigrinum Melanostictum) by : Stephen Spear
Download or read book Landscape Genetics of the Blotched Tiger Salamander (Ambystoma Tigrinum Melanostictum) written by Stephen Spear and published by . This book was released on 2005 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of landscape genetics has great potential to identify habitat features that influence population genetic structure. To identify landscape correlates of genetic differentiation in a quantitative fashion, we developed a novel approach using geographical information systems analysis. We present data on blotched tiger salamanders (Ambystoma tigrinum melanostictum) from 10 sites across the northern range of Yellowstone National Park in Montana and Wyoming, USA. We used eight microsatellite loci to analyse population genetic structure. We tested whether landscape variables, including topographical distance, elevation, wetland likelihood, cover type and number of river and stream crossings, were correlated with genetic subdivision (FST ). We then compared five hypothetical dispersal routes with a straight-line distance model using two approaches: (i) partial Mantel tests using Akaike?s information criterion scores to evaluate model robustness and (ii) the BIOENV procedure, which uses a Spearman rank correlation to determine the combination of environmental variables that best fits the genetic data. Overall, gene flow appears highly restricted among sites, with a global FST of 0.24. While there is a significant isolation-bydistance pattern, incorporating landscape variables substantially improved the fit of the model (from an r2 of 0.3 to 0.8) explaining genetic differentiation. It appears that gene flow follows a straight-line topographic route, with river crossings and open shrub habitat correlated with lower FST and thus, decreased differentiation, while distance and elevation difference appear to increase differentiation. This study demonstrates a general approach that can be used to determine the influence of landscape variables on population genetic structure.
Book Synopsis Tiger Salamanders by : Jens Benthien
Download or read book Tiger Salamanders written by Jens Benthien and published by tredition. This book was released on 2018-11-28 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jens Benthien introduces the interested beginner to the world of keeping and breeding Tiger Salamanders in the terrarium, but also provides some useful pointers and suggestions for the more advanced terrarium keeper. While Tiger Salamanders are well suited to the beginner in keeping amphibians, it is also of interest to the more advanced enthusiast, in particular because it poses some challenges with regard to propagating it. Following an overview of the genus, the distribution, and the ecology of Tiger Salamanders in the wild, the book with its appr. 80 color photographs details how to house these animals according to their biological needs, how to properly feed and care for them, and what is required to propagate the representatives of the North American Tiger Salamanders of the genus Ambystoma. Their ability to optionally remain and become sexually mature at their larval stage (neoteny), the problem of hybridizing, and the possible emergence of color anomalies are briefly discussed as well.
Book Synopsis Natural History of the Rocky Mountain Tiger Salamander Ambystoma Tigrinum and the Occurrence of Polydactylism in a Local Population by : Robert S. Hamilton
Download or read book Natural History of the Rocky Mountain Tiger Salamander Ambystoma Tigrinum and the Occurrence of Polydactylism in a Local Population written by Robert S. Hamilton and published by . This book was released on 1949 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Population Structure of the Tiger Salamander, Ambystoma Tigrinum by : Richard Peder Hill
Download or read book The Population Structure of the Tiger Salamander, Ambystoma Tigrinum written by Richard Peder Hill and published by . This book was released on 1998 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hybrid Vigor Between Native and Introduced Salamanders Raises New Challenges for Conservation by : Benjamin M. Firzpatrick
Download or read book Hybrid Vigor Between Native and Introduced Salamanders Raises New Challenges for Conservation written by Benjamin M. Firzpatrick and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybridization between differentiated lineages can have many different consequences depending on fitness variation among hybrid offspring. When introduced organisms hybridize with natives, the ensuing evolutionary dynamics may substantially complicate conservation decisions. Understanding the fitness consequences of hybridization is an important first step in predicting its evolutionary outcome and conservation impact. Here, we measured natural selection caused by differential viability of hybrid larvae in wild populations where native California Tiger Salamanders (Ambystoma californiense) and introduced Barred Tiger Salamanders (Ambystoma tigrinum mavortium) have been hybridizing for 50?60 years. We found strong evidence of hybrid vigor; mixed-ancestry genotypes had higher survival rates than genotypes containing mostly native or mostly introduced alleles. Hybrid vigor may be caused by heterozygote advantage (overdominance) or recombinant hybrid vigor (due to epistasis or complementation). These genetic mechanisms are not mutually exclusive, and we find statistical support for both overdominant and recombinant contributions to hybrid vigor in larval tiger salamanders. Because recombinant homozygous genotypes can breed true, a single highly fit genotype with a mosaic of native and introduced alleles may eventually replace the historically pure California Tiger Salamander (listed as Threatened under the U.S. Endangered Species Act). The management implications of this outcome are complex: Genetically pure populations may not persist into the future, but average fitness and population viability of admixed California Tiger Salamanders may be enhanced. The ecological consequences for other native species are unknown.
Book Synopsis Life History and Secondary Production of Tiger Salamanders (Ambystoma Tigrinum) in Prairie Pothole Lakes by : William D. Wiedenheft
Download or read book Life History and Secondary Production of Tiger Salamanders (Ambystoma Tigrinum) in Prairie Pothole Lakes written by William D. Wiedenheft and published by . This book was released on 1983 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Brain of the Tiger Salamander by : C. Judson Herrick
Download or read book The Brain of the Tiger Salamander written by C. Judson Herrick and published by . This book was released on 2013-06 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology and Life History of the Tiger Salamander, Ambystoma Tigrinum Nebulosum Hallowell, on the Kaibab Plateau by : Howard Joseph Berna
Download or read book Ecology and Life History of the Tiger Salamander, Ambystoma Tigrinum Nebulosum Hallowell, on the Kaibab Plateau written by Howard Joseph Berna and published by . This book was released on 1990 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Brain Of The Tiger Salamander, Ambystoma Tigrinum by :
Download or read book Brain Of The Tiger Salamander, Ambystoma Tigrinum written by and published by . This book was released on 1948 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Variation Among Populations of the Sonora Tiger Salamander (Ambystoma Tigrinum Stebbinsi Lowe) by : Robert E. Ziemba
Download or read book Genetic Variation Among Populations of the Sonora Tiger Salamander (Ambystoma Tigrinum Stebbinsi Lowe) written by Robert E. Ziemba and published by . This book was released on 1998 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
