Download or read book Effects of Predation by Fathead Minnows Pimephales Promelas on Planktonic Communities in Small Eutrophic Ponds written by Louis Anthony Helfrich and published by . This book was released on 1976 with total page 150 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 1977 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by International Association of Theoretical and Applied Limnology and published by . This book was released on 1984 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predator prey Interactions Among Crustacean Plankton Young Bluegill Lepomis Macrochirus and Walleye Stizostedion Vitreum in Experimental Ecosystems written by Thomas David Forsythe and published by . This book was released on 1977 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sport Fishery Abstracts written by and published by . This book was released on 1976 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin of the Ecological Society of America written by and published by . This book was released on 1977 with total page 184 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 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feeding Filtering Fecundity and Growth Kinetics as Limits to Population Dynamics of Daphnia Pulex written by Mike Allan Wessels and published by . This book was released on 1986 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Predation Risk on Phenotypic and Hatching Time Variation in Fathead Minnow i pimephales Promelas i Embryos written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Predation has long been recognized as a strong selective force influencing the behaviour, morphology and life history traits of prey species. Some prey species have the ability to alter their phenotypes in response to predation threat, to decrease their chances of being detected, caught and/or consumed by predators. It has also been demonstrated that some species have control over the timing of transition between one specific life stage and the next. This ability gives the prey control over how much time it spends in a risky stage. A particularly vulnerable stage for many prey fishes is that of the embryo, as they are a major prey item for many invertebrate and vertebrate predators. As such, strong selection pressure should exist for the development of anti-predator defenses specific for this time period. In a series of four experiments I assessed the ability of fathead minnow embryos to alter their hatching time and/or phenotype in response to various predation threats. In the first three experiments injured embryo cue was used to simulate a predation threat, as it has been shown to represent a general predation risk for many aquatic animals. In the fourth experiment predator odour was used in conjunction with injured embryo cues. Results of a power analysis conducted on the first three experiments determined with 95% confidence that fathead minnow embryos do not alter their hatch time in response to injured embryo cues. However, the embryos in the predation treatment did hatch with an altered phenotype; fry were significantly smaller (total body length) when exposed to predation cues. In the fourth experiment the embryos hatched with the same altered morphology in response to injured embryo cues combined with predator cues. Moreover, in this experiment the embryos hatched faster in the predation treatment than the control treatment. This is the first empirical evidence that fish can alter their hatching time in response to predation.
Download or read book General Program Annual AIBS Meeting of Biological Societies written by American Institute of Biological Sciences and published by . This book was released on 1975 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Ecology written by Bill Freedman and published by Elsevier. This book was released on 2013-09-25 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Ecology: The Impacts of Pollution and Other Stresses on Ecosystem Structure and Function deals with environmental studies on the ecological impacts of anthropogenic stresses. The book discusses more particularly the ways that anthropogenic or natural influences affect the quality of the inorganic and biotic components of the biosphere, as well as the human environment. The text discusses the sources of air pollution, the different toxic elements (naturally occurring contamination or anthropogenic sources), and acidifying substances or "acid rain." The author also cites several studies that deal with the reclamation of acidified bodies of water. Another topic the author addresses is declining forest areas; he then cites several case studies of this occurrence, such as those by Fowells, 1965; Hepting, 1971; and Auclair, 1987. The text also investigates the ecological effects of oil pollution caused during the refining process and transportation. The author then examines the general response patterns to ecological stress. The text is intended for advanced students of environmental ecology and environmental science, as well as for ecologists, environmentalists, and urban planners and officials.
Download or read book Role of Light Carbon Dioxide and Nitrogen in Regulation of Buoyancy and Growth of Blue green Algae written by Craig Nelson Spencer and published by . This book was released on 1984 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Largemouth Bass Micropterus Salmoides Predation on the Growth Rate of Fathead Minnows Pimephales Promelas written by Michael Lauer and published by . This book was released on 1988 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proximate effects predators can have on prey behavior are well known. Few studies, though, have quantified the effects that a prolonged exposure to a predator could have on prey growth. In the laboratory, young-of-year fathead minnows (Pimephales promelas) were protected from largemouth bass (Micropterus salmoides) predation by a perforated plexiglass partition. Minnows within the enclosure were allowed to witness bass predation of conspecifics outside the enclosure.
Download or read book Lake and Reservoir Restoration written by G. Dennis Cooke and published by Elsevier. This book was released on 2013-10-22 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake and Reservoir Restoration deals with the eutrophication process and the methods to protect, restore, and manage lakes and reservoirs. The most common in-lake techniques or procedures, plus nutrient diversion, are reviewed with regard to their scientific basis, methods of application, known effectiveness, feasibility, drawbacks, and costs. Areas for further research and development are also highlighted. This book is comprised of 16 chapters organized into four sections. After an introduction to the theory of the problem and the restoration technique, the discussion turns to the various restoration methods such as those used for physical and chemical control of nutrients. Diversion and advanced waste treatment, hypolimnetic withdrawal, and dilution and flushing are considered along with phosphorus precipitation and inactivation, sediment oxidation, sediment removal, and hypolimnetic aeration. Case studies and success stories are presented and the costs and potential negative impacts of the methods are examined. The following chapters focus on methods to control plant biomass, including artificial circulation, water-level drawdown, harvesting, biological control, and surface and sediment covers. A chapter on liming acidified lakes concludes this text. This monograph will be useful to professional limnologists and engineers, on-site lake or reservoir managers, and those who are interested in learning about the problems and management of lakes and reservoirs.
Download or read book The Structuring Role of Submerged Macrophytes in Lakes written by Erik Jeppesen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid growth of the discipline of aquatic ecology has been driven both by scientific interest in the complexities of aquatic ecosystems and by their enormous environmental importance and sensitivity. This book focuses on the remarkably diverse roles played by underwater plants, and is divided into three parts: 10 thematic chapters, followed by 18 case studies, and rounded off by three integrative chapters. The topics range from macrophytes as fish food to macrophytes as mollusc and microbe habitat, making this of interest to aquatic ecologists as well as limnologists, ecosystem ecologists, microbial ecologists, fish biologists, and environmental managers.
Download or read book Ecology Abstracts written by and published by . This book was released on 1997 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
