Download or read book Electrophoretic Discrimination of Two Limpet Sibling Species Acmaeidae and Evolutionary Implications of Their Ecological Geographic and Genetic Relationships written by Philip Gordon Murphy and published by . This book was released on 1983 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrophoretic Discrimination of Two Limpet Sibling Species Acmaeidae and Evolutionary Implications of Their Ecological Geographic and Genetic Relationships written by Philip Gordon Murphy and published by . This book was released on 1983 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Allopatry Sympatric Morphological Divergence and the Evolution of Reproductive Isolation in the Prosobranch Snail Genus Nucella written by Peter Benjamin Marko and published by . This book was released on 1997 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boletin de Ciencias Marinas written by and published by . This book was released on 1986 with total page 772 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 1983-12 with total page 576 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 1989 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Genetics written by Antonio M. Solé-Cava and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our current knowledge of marine organisms and the factors affecting their ecology, distribution and evolution has been revolutionised by the use, in the last 20 years, of molecular population genetics tools. This book is the result of a meeting of world-leading experts, in Rio de Janeiro, where the state of the art of this field was reviewed. Topics covered include the molecular analysis of bio-invasions, the recent developments in marine biotechnology, the factors affecting levels of genetic variation and population structure in marine organisms and their application to conservation biology, fisheries and aquaculture. This is the first book dedicated to the genetic study of marine organisms. It will be very useful to biology students, scientists and anyone working or simply interested in areas such as marine biology, zoology, ecology, and population and molecular genetics.
Download or read book Evolutionary Genetics of the Family Placobranchidae Mollusca Gastropoda Opisthobranchia Sacoglossa written by Anna Lee Bass and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Members of the family Placobranchidae have been the focus of numerous studies because of their interesting physiological adaptations (kleptochemistry and kleptoplasty) and ecological associations with marine algae. More than 100 species have been described since the 1800's, but no determination of phylogenetic relationships in the family has occurred. DNA sequences from two mitochondrial genes (large subunit ribosomal and cytochrome c oxidase subunit I) and one nuclear gene (Histone 3) were used to reconstruct relationships among 34 nominal species within the Placobranchidae. Strong support for terminal nodes was found using Bayesian phylogenetic methods; however, a "soft" polytomy was detected at internal nodes. In general, the results confirm the paraphyly of Elysia. Proposals for the designation of the genera, Thallepus Swainson, 1840 and Tridachia Deshayes, 1857 and delineation of species are presented. How intrinsic factors affect speciation rates in groups of animals has been a central focus in evolutionary biology. Adaptive radiation associated with food choice has been postulated for the opisthobranch order Sacoglossa. An increase in the rate of cladogenesis was detected within the family Placobranchidae and intrinsic factors such as larval development, kleptoplasty and food choice were investigated as potential key innovations. Ancestral state reconstruction of characters suggests that food choice played a dominant role in influencing speciation rate within the family Placobranchidae. Life history strategy may play an important role in structuring genetic variation throughout the geographic range of a species. Members of the sacoglossan family Placobranchidae Gray, 1840, exhibit variation in life history strategies such as feeding preference and degree of kleptoplasty that could be influential in population structuring. Three species, Elysia subornata Verrill, 1901, Elysia tuca Marcus and Marcus, 1967, and Elysia crispata Mörch, 1863 were sampled from several locations in an attempt to quantify genetic variation as indicated by cytochrome c oxidase subunit I gene sequencing. Elysia crispata exhibited the highest degree of population subdivision followed by Elysia tuca and Elysia subornata. Nucleotide and haplotype diversity also revealed the same general ranking of species. Preliminary conclusions suggest that diversity in feeding preference and degree of kleptoplasty play significant roles in population subdivision of these species.
Download or read book Evolutionary Biogeography of the Marine Algae of the North Atlantic written by David J. Garbary and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Algal systematists, geologists and evolutionary biologists provide a synthesis of the evolutionary biogeography of red, brown, and green algae of the North Atlantic Ocean also considering their relationships with species and genera in the Arctic and Pacific Oceans as well as other subtropical and tropical seas. The history of the Atlantic Basin and its connections to other ocean basins is treated from the geological, paleontological and paleoclimatic perspective. This is contrasted with biogeographic analyses of marine animal systems and the role of plant/animal interactions in evolution. Some of the approaches include traditional systematic studies, cladistic analysis, the experimental evaluation of environment in establishing distribution limits and the application of molecular biology.
Download or read book Foundations of Phylogenetic Systematics written by Johann Wolfgang Wägele and published by . This book was released on 2005 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phylogeny inference and the classification of organisms are indispensable for all fields of biology. On the basis of a well corroborated tree of life it is possible to understand the evolution of structure and function, of genomes, of gene families, of cascades of developmental genes, and the origin of genes of medical importance. Ecologists need a stable classification of organisms to identify organisms, to find their correct names and thus further information on relevant species. This book offers an introduction to the theory of Phylogenetic Systematics and is a companion for all biologists who want to analyze morphological or molecular data with classical methods or with modern computer programs. The first part of the book explains the epistemological basis that is independent of the type of method used to construct phylogenetic trees. Unlike other empirical sciences, the estimation of data quality in phylogenetics is still little developed and very often neglected. Here a theoretical basis is presented that enables the systematist to assess critically and objectively the quality of different data sets and to make statements on the plausibility of results. This requires a conception of the notions of information content, probability of homology, probability of cognition, probability of events, the principle of parsimony, the differentiation of phenomenological and modelling methods. Willi Hennig's original method is compared with modern numerical systematics and an updated Hennigian procedure of data analysis is discussed. The difference between phenetic and phylogenetic cladistics is explained. Popular tools for data evaluation implemented in computer programs are explained including their axiomatic assumptions, sources of error and possible applications. For the more common tools the mathematical background is explained in a simple, easy-to-understand way.Johann-Wolfgang Wagele was until recently head of the Department for Animal Systematics (Lehrstuhl fur Spezielle Zoologie) at the University of Bochum and is now director of the Museum Alexander Koenig in Bonn (Germany). His main research interests are the taxonomy, phylogeny and biodiversity of Isopoda, which implies observations of life history, biogeography and ecology in combination with phylogeny inference. Further subjects include arthropod phylogeny and tools for explorative data analyses. The author is president of the Gesellschaft fur Biologische Systematik, a Central European society of systematists, and he is actively promoting biodiversity research.
Download or read book Galapagos Marine Invertebrates written by Matthew J. James and published by . This book was released on 2014-09-01 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aseptolin written by Cyrus Edson and published by . This book was released on 1896 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fletcherism what it is written by Horace Fletcher and published by . This book was released on 1913 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Conchologist written by and published by . This book was released on 1891 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taxonomic Authority List written by Aquatic Sciences and Fisheries Information System and published by Food & Agriculture Org.. This book was released on 1988 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Golfo de California written by Richard A. Schwartzlose and published by . This book was released on 1992 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
