Download or read book Bottom Soils Sediment and Pond Aquaculture written by Claude E. Boyd and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquaculture pond managers measure water-quality variables and attempt to maintain them within optimal ranges for shrimp and fish, but surprisingly little attention is paid to pond soil condition. Soil-water interactions can strongly impact water quality, and soil factors should be considered in aquaculture pond management. The importance of soils in pond management will be illustrated with an example from pond fertilization and another from aeration. Pond fertilization may not produce phytoplankton blooms in acidic ponds. Total alkalinity is too low to provide adequate carbon dioxide for photosynthesis, and acidic soils adsorb phosphate added in fertilizer before phytoplankton can use it. Agricultural lime stone application can raise total alkalinity and neutralize soil acidity. The amount of limestone necessary to cause these changes in a pond depends on the base unsaturation and exchange acidity of the bottom soil. Two ponds with the same total alkalinity and soil pH may require vastly different quantities of limestone because they differ in exchange acidity. Aeration enhances dissolved oxygen concentrations in pond water and permits greater feed inputs to enhance fish or shrimp production. As feeding rates are raised, organic matter accumulates in pond soils. In ponds with very high feeding rates, aeration may supply enough dissolved oxygen in the water column for fish or shrimp, but it may be impossible to maintain aerobic conditions in the surface layers of pond soil. Toxic metabolites produced by microorganisms in anaerobic soils may enter the pond water and harm fish or shrimp.
Download or read book Fish production and sediment written by and published by . This book was released on 1988 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method for Predicting Fish Response to Sediment Yields written by and published by . This book was released on 1980 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Aquaculture and Environment written by Stig-Håkan Henriksson and published by Nordic Council of Ministers. This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment in Streams written by Thomas F. Waters and published by . This book was released on 1995 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Effects of Marine Finfish Aquaculture written by Barry Hargrave and published by Springer Science & Business Media. This book was released on 2005-08-24 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental risks associated with large-scale marine finfish cage aquaculture cast doubt on the sustainability of the industry. This book divides the topic into its broad parts: Eutrophication; Sedimentation and Benthic Impacts; Changes in Trophic Structure and Function; and Managing Environmental Risks, and goes further to analyze methods and models currently used to measure near and far-field environmental effects of finfish mariculture and and their implications for management.
Download or read book Macrobenthic Succession and Changes in Sediment Biogeochemistry Following Marine Fish Farming written by Paula Maria Ferreira Pereira and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Trawling and Dredging on Seafloor Habitat written by National Research Council and published by National Academies Press. This book was released on 2002-08-09 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Download or read book Modern Foraminifera written by Barun K. Sen Gupta and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the reviews: "This is now the definitive, authoritative text on applied foraminiferal micropaleontology and should be in the library of all practicing micropaleontologists." (William A. Berggren, Woods Hole Oceanographic Institution in Micropaleontology, 47:1 (2001)"During the last 20 years there has been an explosion of publications about foraminifera from an amazing variety of disciplines: basic cell biology, algal symbiosis, biomineralization, biogeography, ecology, pollution, chemical oceanography, geochemistry, paleoceanography, and geology. This book summarizes contributions by leading researchers in these diverse fields. It is not just another text on the biology of foraminifera. Rather, Barun Sen Gupta has accomplished his objective to "write an advanced text for university students that would also serve as a reference book for professionals"." (Howard J. Spero, University of California at Davis in Limnology and Oceanography, 45:8 (2000).
Download or read book Cage and Pen Fish Farming written by Malcolm C. M. Beveridge and published by Food & Agriculture Org.. This book was released on 1984 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spine title: Environmental impact of freshwater cage and pen fish farming.
Download or read book Geochemistry of Sedimentary Carbonates written by J.W. Morse and published by Elsevier. This book was released on 1990-08-27 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the more basic aspects of carbonate minerals and their interaction with aqueous solutions; modern marine carbonate formation and sediments; carbonate diagenesis (early marine, meteoric and burial); the global cycle of carbon and human intervention; and the role of sedimentary carbonates as indicators of stability and changes in the Earth's surface environment. The selected subjects are presented with sufficient background information to enable the non-specialist to understand the basic chemistry involved. Tested on classes taught by the authors, and approved by the students, this comprehensive volume will prove itself to be a valuable reference source to students, researchers and professionals in the fields of oceanography, geochemistry, petrology, environmental science and petroleum geology.
Download or read book Aquaculture in the Ecosystem written by Marianne Holmer and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a scientific forecast of development in aquaculture with a focus on the environmental, technological, social and economic constraints that need to be resolved to ensure sustainable development of the industry and allow the industry to be able to feed healthy seafood products to future generations. The chapters discuss the most critical bottlenecks of the development. They encompass subjects of understanding the environmental impacts, the current state-of-the-art in monitoring programs and in coastal zone management, the important interactions between wild and cultured organisms including release of non-native species into the wild.
Download or read book Shellfish Aquaculture and the Environment written by Sandra E. Shumway and published by John Wiley & Sons. This book was released on 2011-11-15 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shellfish Aquaculture and the Environment focuses primarily on the issues surrounding environmental sustainability of shellfish aquaculture. The chapters in this book provide readers with the most current data available on topics such as resource enhancement and habitat restoration. Shellfish Aquaculture and the Environment is also an invaluable resource for those looking to develop and implement environmental best management practices. Edited one of the world's leading shellfish researchers and with contributions from around the world, Shellfish Aquaculture and the Environment is the definitive source of information for this increasingly important topic. View the Executive Summary here: http://seagrant.uconn.edu/publications/aquaculture/execsumm.pdf
Download or read book The Role of Fish Ponds in the Nutrient Dynamics of Mixed Farming Systems written by Patricia Nduku Muendo and published by . This book was released on 2006* with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology of Seagrasses written by A. W. D. Larkum and published by Elsevier Publishing Company. This book was released on 1989 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. Seagrasses are a common feature of inshore coastal waters of all continents except Antarctica. This book, the first to attempt a comprehensive coverage of seagrasses, will attract a wide audience including botanists, zoologists, geologists, and experts in fisheries and coastal management. There are individual chapters on all aspects of the plants themselves, from questions of taxonomy, reproduction and evolution, through ecology and biogeography, to the physiological aspects of photosynthesis, nutrition and salt balance.The fauna associated with seagrass beds are also dealt with extensively, including meiofauna, large grazers (including dugongs and turtles), and fish. The book examines the role of seagrass beds as nursery grounds for commercially important fish, and addresses the problems of human impact on seagrass communities, the conservation of seagrass beds, and their restoration.The book is written for an international audience lar
Download or read book Effects of Suspended Solids and Sediment of Reproduction and Early Life of Warmwater Fishes written by Corvallis Environmental Research Laboratory and published by . This book was released on 1979 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrient Dynamics in Freshwater Fish Culture System written by C.B.T. Rajagopalsmy and published by Daya Books. This book was released on 2002-04 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quality seed, feed and fertilizer are known to decree target fish yield in any type of aquaculture system. Among these vital factors, the right type and input schedule of fertilizers have gathered much scientific concern. Obviously, phosphorus the major limiting nutrient of freshwater culture system has been studied in detail by various workers. However, there is brevity of information on the colossal loss of money encountered by the fisheries sector engrossed in freshwater culture due to the transformation of phosphatic fertilizers into non-recyclable apatite phosphorus. This book provides the first hand information on the utilization of sodium tripolyphosphate in hard water fish culture system for relegating the formation of apatite. The merit of such investigations lie in the fact that the development of a proper phosphatic fertilization schedule for hard water will hold good for brackishwater fish pond also. The results of the present investigation affirm the fact that apatite occurs as the second major constituent of total sedimentary phosphorus. Though the chemical reactions leading to the formation of apatite in aquatic ecosystems remain as a riddle, many of the field trials fortify the operation of the phenomenon of apatite formation in aquaculture system. The present study focuses its prime attention over this crucial reality and advocates the benefits of utilizing sodium tripolyphosphate as a phosphatic fertilizer in aquaculture system. The authors are convinced that intensive field trails in this regard would pave way for the most aspired blue revolution. Contents: Chapter 1: Introduction, Chapter 2: Sample Collection and Methods; Field Experiments on the Dynamics of N and P, Experiment on Regeneration of Sedimentary Nutrients, Experiment on the Hydrolysis of Polyphosphate, Chapter 3: Salient Physico-Chemical Characteristics of the Experimental Ponds; Results, Water Temperature, Secchi Disc Regarding, pH, Dissolved Oxygen, Water Hardness, Carbonate Alkalinity, Bicarbonate Alkalinity, Chlorphyll a , Net Productivity, Assimilation Number, Discussion, Chapter 4: Nitrogen Cycle, Chapter 5: Chemical Species of Nitrogen in Water and Sediment; Results, Ammonia-N, Nitrite-N, Nitrate-N, Exchangeable Ammonia-N (E-NH3-N), Exchangeable Nitrite-N (E-NO2-N), Exchangeable Nitrite-N (E-NO3-N), Sedimentary Organic Nitrogen (SON), Discussion, Chapter 6: Phosphorus Cycle, Chapter 7: Chemical Species of Phosphorus in Water and Sediment; Results, Soluble Inorganic Phosphorus (SIP), Soluble Organic Phosphorus (SOP), Particulate Phosphorus (PP), Polyphosphate-P (PyP), Neutral Hydrolysable Phosphorus (NH-P), Phosphorus Bound to Carbonate (CO3-P), Phosphorus Bound to Oxides of Iron and Manganese (O-Fe and Mn-P), Phosphorus Bound to Iron and Aluminium (Fe and Al-P), Apatite Phosphorus (A-P), Phosphorus Bound to Organic Matter (Po), Residual Phosphorus (R-P), Regeneration of Nitrogen and Phosphorus from Sediment, Hydrolysis of Polyphosphate, Nitrogen: Phosphorus Ration, Fish Production, Discussion, Chapter 8: Conclusion.
