Download or read book Habitat Association and Genetic Similarity Among Populations of the Great Plains Toad Bufo Cognatus in the Chihuahuan Desert written by Jeremy Jungels and published by . This book was released on 2008 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Biogeographical Analysis of the Chihuahuan Desert through its Herpetofauna written by D.J. Morafka and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mexican Plateau, in its magnificent dimensions and material wealth, stood among the first and perhaps most alluring discoveries of European explorers. Bur ied deeper in the verbal histories of a now vanquished people, the American Indians, must be the primordial human awareness of the inverted complex triangle that dominates the Mexican topography, climate and biota. It always has been viewed by man as a source of wealth and a center of authority. The plateau is the pillar upon which all Mexican conquerors have erected their capitols, tilled their crops and mined for their treasure, and from which they dispersed the forces of their authority. Ironically, the same size and diversity that give the plateau its value, also make it an immense barrier. Its broad desert and three to five thousand meter high crests constitute severe obstacles in the path of North American man. What has just been said of mankind in general, can be applied to the biologist in particular. He too has termed the goliath southern plateau as the crucible of the arid biotas of the continent (i. e. , 'Madro-Tertiary'). The biologist found the plateau to be a region of tremendous richness and diversity. But he also has been inhibited both physically and intellectually by its high mountain and vast desert barriers.
Download or read book Bufo Cognatus Great Plains Toad written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Highlights Bufo cognatus, the Great Plains toad, provided by Texas Memorial Museum of the University of Texas at Austin. Includes a photograph of the toad and discusses the toad's size, color, habitat, behavior, breeding, and range in Texas.
Download or read book The Tadpoles of Bufo cognatus Say written by Hobart M. Smith and published by Good Press. This book was released on 2020-03-16 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a pamphlet discussing whether a recently announced new toad species, Bufo cognatus, is indeed an entirely different species. The pamphlet was written by Hobart Muir Smith, born Frederick William Stouffer, an American herpetologist. He is credited with describing more than 100 new species of American reptiles and amphibians.
Download or read book Great Plains Toad Bufo Cognatus written by Terry A. Messmer and published by . This book was released on 1995* with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Great Plains Toad Bufo Cognatus in Alberta written by James, Janice D and published by . This book was released on 1998 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Tadpoles of Bufo Cognatus Say written by Hobart Muir Smith and published by . This book was released on 1946 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sexual Selection and Mating System Variation in the Great Plains Toad Bufo Cognatus Say and Woodhouse s Toad Bufo Woodhousei Australis Shannon and Lowe written by Brian Keith Sullivan and published by . This book was released on 1983 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alberta s Great Plains Toad Bufo Cognatus written by Alberta. Alberta Sustainable Resource Development and published by . This book was released on 2002 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction and Analyses of a Microsatellite Library for the Great Plains Toad Bufo Cognatus written by Zorisadday Gonzalez and published by . This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Variation and Population Structure in the Endangered Houston Toad in Contrast to Its Common Sympatric Relative the Coastal Plain Toad written by Diana J. McHenry and published by . This book was released on 2010 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: I determined the number of populations, the levels of genetic diversity within and among populations, and migration/movement rates at the landscape and fine scales in the endangered Houston toad, Bufo houstonensis (Anura: Bufonidae) using mitochondrial sequence data and microsatellite loci. Genetic clustering analyses indicate nine populations across the range. The most divergent population was in Austin County, Texas. Genetic diversity was high across the range and within populations. I also examined population genetic structure and diversity in a common, sympatric congener, the coastal plain toad (Bufo nebulifer). Bufo houstonensis and B. nebulifer have comparable levels of genetic diversity, but B. nebulifer appears to migrate less frequently or over less distance than its endangered congener. Finally, I investigated the baseline levels of genetic admixture, or hybridization, in B. houstonensis. Admixture between B. houstonensis and two sympatric species (B. nebulifer and Bufo woodhousii) was detected. With continued habitat alteration and rising temperatures, both habitat isolation and offset breeding season have already partially broken down as isolating mechanisms and may deteriorate further; consequently, opportunities for hybridization events will increase. Conservation recommendations for B. houstonensis include supplementation programs to increase the number of individuals, preservation of all three habitat types (breeding/nursery, occupied, and dispersal), special attention towards the Austin County population, and involvement of the general public in conservation.
Download or read book Mate Choice and Mate Location Tactics in the Great Plains Toad Bufo Cognatus written by James J. Krupa and published by . This book was released on 1987 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Great Plains Toad Bufo Cognatus in Alberta written by Alberta. Dept. of Environmental Protection. Wildlife Management Division. Status and Surveys Branch and published by . This book was released on 1998 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Great Plains Toad Bufo Anaxyrus Cognatus in Alberta written by Kimberly Joy Pearson and published by . This book was released on 2009 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The status of the Great Plains toad (Bufo [Anaxyrus] cognatus), a moderately large toad species whose range extends northwards into southeastern Alberta, has been of concern to wildlife managers for several years. Several recent surveys for species presence have led to the description of a number of previously undocumented occurences of Great Plains toads in Alberta. These additional occurrences, along wtih improved data collation and management through systems clarify the previously described species' range and area of occurrence. This report compiles and summarizes the most recent information available on the Great Plains toad in Alberta as a means toward updating the species' current provincial status.--Document.
Download or read book Status of the Great Plains Toad Bufo Anaxyrus Cognatus in Alberta written by Kimberly J. Pearson and published by . This book was released on 2009 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amphibians and Reptiles of New Mexico written by William G. Degenhardt and published by UNM Press. This book was released on 1996 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive reference source covering the 123 species of amphibians and reptiles found in New Mexico, including over 130 color plates and 100 maps.
Download or read book 1996 IUCN Red List of Threatened Animals written by Ulf Gärdenfors and published by IUCN. This book was released on 1996 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1994 IUCN Red List of Threatened Animals was a major advance on its predecessors in clarity of layout and amount of information presented. This is taken further in the 1996 edition, which is also the first global compilation to use the complete new IUCN Red List category system.
