Download or read book Daphnia pulex population from a natural source written by An Goorden and published by . This book was released on 1996 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Limnoecology written by Winfried Lampert and published by Oxford University Press, USA. This book was released on 2007-07-26 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition will build upon the strengths of the earlier work but will be thoroughly revised throughout to incorporate findings from new technologies and methods (notably the rapid development of molecular genetic methods and stable isotope techniques) that have allowed a rapid and ongoing development of the field.
Download or read book Population Dynamics of Daphnia Pulex written by Sidney John Crabtree and published by . This book was released on 1975 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eco Evolutionary Dynamics written by and published by Academic Press. This book was released on 2014-08-12 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theme of this volume is to discuss Eco-evolutionary Dynamics. Updates and informs the reader on the latest research findings Written by leading experts in the field Highlights areas for future investigation
Download or read book Genotypic and Phenotypic Variation in Populations of Daphnia Pulex written by Susan Rose Krepp and published by . This book was released on 1977 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AN EXPERIMENTAL APPROACH TO THE DYNAMICS OF A NATURAL POPULATION OF DAPHNIA GALEATA MENDOTAE written by Donald James Hall and published by . This book was released on 1962 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Impact of Natural Phytoplankton Assemblages on Daphnia Pulex Reproduction in Oneida Lake New York written by Kenneth Joseph Wagner and published by . This book was released on 1983 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology and Evolution of Inducible Defenses written by Ralph Tollrian and published by Princeton University Press. This book was released on 1999-01-17 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inducible defenses--those often dramatic phenotypic shifts in prey activated by biological agents ranging from predators to pathogens--are widespread in the natural world. Yet research on the inducible defenses used by vertebrates, invertebrates, and plants in terrestrial, marine, and freshwater habitats has largely developed along independent lines. Tollrian and Harvell bring together leading researchers from all fields to review common themes and explore emerging ideas. Contributors examine organisms as different as unicellular algae and higher vertebrates, and consider defenses ranging from immune systems to protective changes in morphology, behavior, chemistry, and life history.
Download or read book The Evolutionary Ecology of Senescence in Daphnia written by Jeffry L. Dudycha and published by . This book was released on 2000 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spontaneous Mutation Rates and Spectra with and Without the Influence of Natural Selection in Daphnia Pulex written by Jullien Flynn and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Spontaneous mutations are the ultimate source of genetic variation, which can generate phenotypic variation upon which natural selection can act. Understanding the rates, patterns, and fitness effects of mutation is essential to many fields of biology, thus several studies have attempted to investigate this fundamental phenomenon over the years. However, knowledge is still limited regarding the mutation rates in most organisms as well as the way selection acts on new mutations in a population. My thesis seeks to increase the understanding of the evolutionary phenomena of mutation and selection by analysing the genomes of mutation accumulation (MA) lines of Daphnia pulex maintained under selection-minimized conditions for many generations as well as isolates from a laboratory population that was founded with the same asexual progenitor and was maintained with selection acting throughout the course of the experiment. This unique experimental setup allows comparison of the rates, types, and patterns of mutations accumulated in conditions with and without selection. The Daphnia were propagated asexually, which allowed the detection of new mutations in a heterozygous state as well as large-scale mutations that result in loss of heterozygosity (LOH). Whole genome sequencing of 24 MA lines facilitated the detection of 477 single nucleotide mutations, and I found that the overall mutation rate in Daphnia is similar to that of other metazoans. One MA line experienced a massive LOH event that caused complete homozygosity across an entire chromosome (3% of the genome), resulting from a large gene conversion event. I also sequenced six isolates from the laboratory population and found fewer mutations than expected, demonstrating that purifying selection was acting strongly in order to purge harmful mutations that decrease fitness. Surprisingly though, the population maintained a high level of genetic diversity, with four distinct lineages from only six individuals. This observed pattern of high diversity was likely driven by balancing selection. My work challenges the assumption that selection is inefficient in asexual populations, provides an example of high diversity maintenance, and provides insight into the entire spectrum and implications of mutation in Daphnia." --
Download or read book POPULATION DYNAMICS OF DAPHNIA PULEX UNDER STRESS EFFECTS OF LOW PH AND FOOD MODELLING STOCHASTIC STATISTICS LIFE TABLES written by PAUL JOSEPH RAGO and published by . This book was released on 1986 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: reduced the rate of growth in length but not the maximum length attained.
Download or read book The Colonization and Subsequent Growth of Daphnia Pulex and D Magna Populations in Four Interconnected Lakes written by James Stephen Webber and published by . This book was released on 1974 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book THE DYNAMICS OF DAPHNIA PULEX POPULATIONS AND OF DUGESIA TIGRINA POPULATIONS AS MODIFIED BY IMMIGRATION written by JOSEPH THEXTON ARMSTRONG (JR) and published by . This book was released on 1959 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fall Stocking of Rainbow Trout in Bad Medicine Lake written by Jodene Hirsch and published by . This book was released on 2000 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Complex Interactions in Lake Communities written by Stephen R. Carpenter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: In its statutory authority (National Science Foundation Act of 1950, as amended), the NSF is directed to both initiate and support basic scientific research. In its Ecology Program, one mode of initiating research is to en courage the development of new ideas through advisory workshops. The NSF is specifically directed to strengthen our nation's research potential. In addition, stimulating new approaches to research will continue to be prominent in the coming years as federal attention is given to increasing the innovativeness and competitiveness of the U. S. in science and engineering. A decision to initiate a workshop does not arise de novo in the Ecology Program. Rather, it emerges from panel discussions, conversations with in vestigators at meetings or on the phone, and from discussions between pro gram officers in the Division of Biotic Systems and Resources. This workshop was developed to provide advice to the NSF and the lim nological community. Some NSF perceptions on future funding for ecolog ical research on lake communities are presented here. Researchers often mentioned a paucity of innovative lake ecology at the community level. This perception was accompanied by a certain frustration since lakes probably have the best empirical data base of any natural environment and should continue to lead in the development of ecological concepts. Members of NSF advisory panels sometimes expressed similar concerns during consid eration of proposals for lake research.
Download or read book Morphological Changes Fish Predation and Elements of Sexual Reproduction in Populations of Daphnia Pulex written by John R. Krummel and published by . This book was released on 1978 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Survival of Daphnia Pulex Relative to Copper Toxicity in the Natural Waters of the Keweenaw Peninsula written by Ross D. Lytle and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
