Download or read book Geographic Variation in Dunn s Salamander Plethodon Dunni Bishop Amphibia Caudata Plethodontidae written by Hugh Grady Hanlin and published by . This book was released on 1980 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life history attributes and apparent distributional patterns suggest that Plethodon dunni exists as small, semi-isolated populations throughout its range. Isozyme and morphological variation in this species was examined to determine any possible geographic trends. Starch gel electrophoresis was utilized to examine genetic variation at 24 isozyme loci in 287 individuals from 12 populations to determine the genetic structure of populations of this species. Low total genetic variability was observed. However, this variability is partitioned into relatively low genetic heterozygosity within populations and proportionally high diversity between populations. It is concluded that this geographically restricted species is characterized by small local populations with little gene flow. Comparisons with previous reports of Plethodon species indicate that the high genetic divergence between local populations is apparently general for species in this genus. There is marked reduction in heterozygosity with peripheral populations of P. dunni, which may result from the reduction in genetic exchange from surrounding populations in peripheral as ccmpared to central populations. No indication of additional structural genes associated with the increased DNA in P. dunni was found. Morphological variation in 10 populations was examined via stepwise discriminant analyses. Considerable overlap of individuals' canonical scores and only moderately correct classifications into groups indicate that phenotypic expression in this species is exceedingly similar. However, on a fine scale there is significant heterogeneity between all populations. Generalized distance values (D2) between the P. dunni populations are high, particularly when compared to those of Aneides ferreus, a wider-ranging, more ubiquitous sympatric species. Clinal variation in morphological divergence was observed and was highly correlated with a similar cline in allele frequencies of EST-2. It is concluded that the phenotypic structuring of populations of P. dunni is consistent with the structuring observed via electrophoresis and that this species is characterized by small, localized populations throughout its range.
Download or read book Wildlife Abstracts written by U.S. Fish and Wildlife Service and published by . This book was released on 1976 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1980 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inland Fisheries Administrative Report written by and published by . This book was released on 1994 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The American Midland Naturalist written by and published by . This book was released on 1999 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: A refereed, broad-spectrum journal publishing basic research in diverse disciplines in biology and varied taxa.
Download or read book Geographic Variation and Taxonomy of Eurycea Bislineata Caudata Plethodontidae in the Upper Ohio Valley written by David M. Sever and published by . This book was released on 1971 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annotated Bibliography of Masters Theses and Doctoral Dissertations on Native California Amphibians and Reptiles 1935 1990 written by Michelle L. Workman and published by . This book was released on 1995 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1973- include the following subject areas: Biological sciences, Agriculture, Chemistry, Environmental sciences, Health sciences, Engineering, Mathematics and statistics, Earth sciences, Physics, Education, Psychology, Sociology, Anthropology, History, Law & political science, Business & economics, Geography & regional planning, Language & literature, Fine arts, Library & information science, Mass communications, Music, Philosophy and Religion.
Download or read book Catalogue of American Amphibians and Reptiles written by American Society of Ichthyologists and Herpetologists. Herpetological Catalogue Committee and published by . This book was released on 1963 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Dissertation Index Biological sciences A E written by and published by . This book was released on 1984 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalogue of American Amphibians and Reptiles written by and published by . This book was released on 1963 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalogue of American Amphibians and Reptiles written by William John Riemer and published by . This book was released on 1971 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parasite Communities Patterns and Processes written by Gerald W. Esch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: We first discussed the possibility of organizing a symposium on helminth communities in June, 1986. At that time, we were engaged in writing a joint paper on potential structuring mechanisms in helminth communities; we disagreed on a number of issues. We felt the reason for such debate was because the discipline was in a great state of flux, with many new concepts and approaches being introduced with increasing frequency. After consider able discussion about the need, scope and the inevitable limitations of such a symposium, we decided that the time was ripe to bring other ecologists, engaged in similar research, face-to-face. There were many individuals from whom to choose; we selected those who were actively publishing on helminth communities or those who had expertise in areas which we felt were particularly appropriate. We compiled a list of potential participants, contacted them and received unanimous support to organize such a symposium. Our intent was to cover several broad areas, fully recognizing that breadth negates depth (at least with a publisher's limitation on the number of pages). We felt it important to consider patterns amongst different kinds of hosts because this is where we had disagreed among ourselves.
Download or read book Reptile Biodiversity written by Roy W. McDiarmid and published by Univ of California Press. This book was released on 2012-01-10 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Authoritative and comprehensive—provides an up-to-date description of the tool box of methods for inventorying and monitoring the diverse spectrum of reptiles. All biodiversity scientists will want to have it during project planning and as study progresses. A must for field biologists, conservation planners, and biodiversity managers.”—Jay M. Savage, San Diego State University “Kudos to the editors and contributors to this book. From the perspective of a non-ecologist such as myself, who only occasionally needs to intensively sample a particular site or habitat, the quality and clarity of this book has been well worth the wait.”—Jack W. Sites, Jr.
Download or read book Biodiversity Biogeography and Nature Conservation in Wallacea and New Guinea written by Dmitry Telnov and published by The Entomological Society of Latvia. This book was released on 2011-08-01 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North American Herpetology written by John Edwards Holbrook and published by . This book was released on 1836 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Herpetological Communities written by Norman J. Scott and published by . This book was released on 1982 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
