Download or read book Red Abalone Haliotis Rufescens Relative Impacts of Recreational Fisheries and Sea Otter Predation on the Abundance Size Frequency and Microhabitat Distribution of Red Abalone Populations in Central and Northern California written by Samantha Pollard and published by . This book was released on 1992 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Densities and Size Compositions of Red Abalone Haliotis Refuscens at Five Locations on the Mendocino and Sonoma County Coasts September 1986 written by David O. Parker and published by . This book was released on 1988 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Settlement and Postlarval Ecology of the Red Abalone Haliotis Rufescens in Culture Systems written by and published by . This book was released on 1999 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several studies on abiotic and biotic factors that may influence metamorphosis induction and early postlarval survival and growth of the abalone Haliotis rufescens (Mollusca: Gastropoda) in culture systems were conducted. The availability of appropriate cues for metamorphosis induction is crucial. The conventional cue provided in abalone culture (diatom films) is inadequate for this species. This study shows, for the first time, that the gamma-aminobutyric acid (GABA) can be used successfully in massive-scale conditions. Metamorphosis induction by this amino acid was 75-76% (after 24 h) while only 8-12% larvae responded to diatom films. Bacterial interference can be minimized by exposing larvae to GABA in clean tanks and adding diatoms (and associated bacteria), as a postlarval food, after metamorphosis is induced. Alternatively, the conventional GABA concentration (1 micromolar) may be increased within safe limits (up to 2-3 micromolar) to cope with potential degradation of the amino acid by bacteria. Another important factor is the timing of settlement, since a suboptimal induction occurred in precompetent larvae or after a prolonged delayed metamorphosis. However, a maximum response to GABA and increased early postlarval development were observed for larvae settling 1-3 days after the onset of competence. Although GABA is now routinely used to improve settlement in many H. rufescens hatcheries, high mortality or slow postlarval growth are still common. Ecological conditions in the benthic boundary layers above diatom-films of culture systems may play an important role on postlarval fitness. Oxygen microgradients within 1 mm above biofilm surfaces were observed in laboratory studies, with bottom levels higher than 180% or lower than 50% saturation in light and dark conditions, respectively. Reduced postlarval survival and growth can also result from the depletion of biofilms after excessive grazing. Thus, information on grazing rates and the factors controlling them is crucial for the optimal management of culture systems. This contribution provides the first estimates of grazing rates of H. rufescens postlarvae, based on the digital analysis of video-recorded images, ranging from 20 to 724 diatom cells/individual/hour during the first month after settlement.
Download or read book Red Abalone Size Data from Johnsons Lee Santa Rosa Island Collected from 1978 to 1984 written by Peter L. Haaker and published by . This book was released on 1986 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Supersaturation and Its Effect on the Red Abalone Haliotis Rufescens Swainson written by Amy Renee Leitman and published by . This book was released on 1989 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biochemical and Histologic Changes in Red Abalone Haliotis Rufescens Subjected to Eight Different Treatment Combinations of Exposure to the Agent of Withering Syndrome Water Temperature and Food Availability written by Beverly Anne Braid and published by . This book was released on 2004 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prehistoric Marine Resource Use in the Indo Pacific Regions written by David Addison and published by ANU E Press. This book was released on 2013-12-20 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although historic sources provide information on recent centuries, archaeology can contribute longer term understandings of pre-industrial marine exploitation in the Indo-Pacific region, providing valuable baseline data for evaluating contemporary ecological trends. This volume contains eleven papers which constitute a diverse but coherent collection on past and present marine resource use in the Indo-Pacific region, within a human-ecological perspective. The geographical focus extends from Eastern Asia, mainly Japan and Insular Southeast Asia (especially the Philippines) to the tropical Pacific (Micronesia, Melanesia, and Polynesia) and outlying sites in coastal Tanzania (Indian Ocean) and coastal California (North Pacific). The volume is divided thematically and temporally into four parts: Part 1, Prehistoric and historic marine resource use in the Indo-Pacific Region; Part 2, Specific marine resource use in the Pacific and Asia; Part 3, Marine use and material culture in the Western Pacific; and Part 4, Modern marine use and resource management.
Download or read book Aquaculture written by John E. Bardach and published by John Wiley & Sons. This book was released on 1974-10-11 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt: Captive Seawater Fishes: Science and Technology Stephen Spotte "The book is clearly a labor of love, and one must admire the author's boundless enthusiasm and breadth of scholarship." —New Scientist A seamlessly clear treatise on the science and technology of maintaining seawater fishes for purposes of aquaculture and public exhibition. Captive Seawater Fishes is the first book to bring together in one volume the disciplines of seawater chemistry, process engineering, and fish physiology, behavior, nutrition, and health. Richly illustrating the interplay between living fishes and the chemical and sensory stimuli of their environment, the book details: chemical processes controlling carbonate stability in seawater; the effect of captivity on physiological processes; sensory processes of fishes, including vision, hearing, and electroreception; diseases of seawater fishes and treatment methods; and more. 1991 (0-471-54554-6) 976 pp. Surveys of Fisheries Resources Donald R. Gunderson The intensive exploitation of fisheries resources has heightened the reliance in the industry on statistical surveying as a means of monitoring the abundance and age composition of existing fish reserves. Here is the first comprehensive look at the unique challenges and problems of fisheries surveying. Covering everything from survey design, bottom trawl surveys, acoustic surveys, to egg and larval surveys and direct counts, as well as the assumptions and limitations surrounding each method, the book is an exhaustive, yet practical guide to designing accurate, cost-effective fisheries surveys. 1993 (0-471-54735-2) 256 pp. Aquatic Pollution: An Introductory Text, Second Edition Edward A. Laws Regarded as the most complete introduction available on the subject, Aquatic Pollution details the ecological principles and toxicological fundamentals behind the phenomenon as well as the latest information on the factors affecting our polluted aquatic environment. Featuring case studies and specific examples, the book systematically examines such problems as urban runoff, sewage disposal, thermal pollution, nutrient loading, industrial wastewater discharges, and oil pollution. The new Second Edition includes three new chapters on groundwater pollution. acid rain, and plastics in the sea, as well as updated and expanded information on eutrophication, pathogens in water supplies, radioactive waste disposal, toxic metals, and pesticide use. 1993 (0-471-58883-0) 611 pp.
Download or read book Development of Behavior and the Central Nervous System of the Red Abalone Haliotis Rufescens written by Linda April Barlow and published by . This book was released on 1991 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California s Living Marine Resources written by William S. Leet and published by University Of California, Division of Agriculture and Natural Resources; Califorinia Sea Grant. This book was released on 2001 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 592-page spiral-bound reference provides a baseline of information for all those involved with managing living marine resources in California and chronicles changes that have occurred in many of the state’s fisheries. Organized by marine ecosystems: bays and estuaries, nearshore and offshore. Includes illustrated species descriptions with details of biological knowledge, fishery history, landings data, population status and references. Also includes sections on marine birds and mammals and appendices containing management considerations (by species), a glossary of technical terms and acronyms and fishing gear illustrations. Jointly produced by the California Sea Grant Extension Program and the California Department of Fish and Game following the passage of the Marine Life Protection Act in January 1999.
Download or read book A Combined Telephone and Creel Survey of the Red Abalone Haliotis Rufescens Swainson Sport Fishery in California from Monterey to the Oregon Border April Through November 1989 written by Konstantin A. Karpov and published by . This book was released on 1992 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status and Trends of the Nation s Biological Resources written by and published by . This book was released on 1998 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Commercial Fisheries Review written by and published by . This book was released on 1966 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploring Methods of Faunal Analysis written by Michael Glassow and published by Cotsen Institute of Archaeology Press. This book was released on 2012-12-31 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: How does the practice of archaeology benefit from faunal analysis? Michael Glassow and Terry Joslin's Exploring Methods of Faunal Analysis: Insights from California Archaeology addresses this question. Contributors to this volume demonstrate how faunal remains can be used to elucidate subsistence, settlement, technological systems, economic exchange, social organization, adaptation to variability in resource distribution and abundance, and the impacts of historic land use. The sheer prevalence of faunal remains in California archaeological sites means that most archaeologists working in the state inevitably must give these resources their close attention-and yet methodological challenges remain. The chapters in this thoughtfully edited volume tackle these challenges, providing strategies for identifying and mitigating sample bias and recommending quantitative techniques borrowed from a variety of disciplines. The volume also presents examples that illustrate the use of faunal data to test hypotheses derived from microeconomic theory, the applicability of bone and shell chemistry to faunal analysis, and the relevance of faunal data to addressing issues in biology.
Download or read book Understanding Imperiled Earth written by Todd J. Braje and published by Smithsonian Institution. This book was released on 2024-03-05 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique introduction to how understanding archaeology can support modern-day sustainability efforts, from restoring forested land to developing fire management strategies An essential and hopeful book for climate-conscious readers The world faces an uncertain future with the rise of climate change, biodiversity loss, deforestation, overfishing, and other threats. Understanding Imperiled Earth meets this uncertainty head-on, presenting archaeology and history as critical guides to addressing the modern environmental crisis. Anthropologist Todd J. Braje draws connections between deep history and today's hot-button environmental news stories to reveal how the study of the ancient past can help build a more sustainable future. The book covers a diverse array of interconnected issues, including: how modern humans have altered the natural world conservation work of Indigenous communities extinction of megafauna like dire wolves and woolly rhinoceros the risk of deforestation highlighted by Notre Dame's destruction the extinction crisis reflected by endangered bird species in Hawai'i fish scarcity driving demand and price, like the single blue-fin tuna fish that sold for three million dollars importance of "action archaeology" Braje examines how historical roots offer a necessary baseline for a healthier Earth, because understanding how the planet used to be is fundamental to creating effective restoration efforts moving forward through urban forests, sustainable food webs, and more. Understanding Imperiled Earth offers an illuminating, hopeful, and actionable approach to some of the world's most urgent problems.
Download or read book Southern Sea Otters Translocation CA OR written by and published by . This book was released on 1987 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Workshop on Rebuilding Abalone Stocks in British Columbia written by Alan Campbell and published by NRC Research Press. This book was released on 2000 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international Workshop on Rebuilding Abalone Stocks in British Columbia was held during February 23-26 , 1999, in Nanaimo, British Columbia, Canada. The main goal of the workshop was to develop a realistic strategy to rehabilitate depleted northern (pinto) abalone, Haliotis kamtschatkana, stocks in British Columbia. The workshop was also meant to clarify the roles, expectations, and shared interests of many of the interest groups in British Columbia,emphasizing the key role in the rebuilding plan of local communities,including First Nations and non-native communities.
