Evaluation of Zooplankton Inoculation and Organic Fertilization for Pond-rearing Walleye Fry to Fingerlings PDF Download
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Author: Christopher Paul Clouse
Publisher:
ISBN:
Category :
Languages : en
Pages : 268
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Book Description
Author: Christopher Paul Clouse
Publisher:
ISBN:
Category :
Languages : en
Pages : 268
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Book Description
Author: Douglas Tave
Publisher: CRC Press
ISBN: 1498710786
Category : Science
Languages : en
Pages : 262
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Book Description
You?ll learn strategies and tactics that can be used to improve production and efficiency in the propagation of fingerlings in fertilized hatchery ponds. This book covers the production of a variety of fish, as well as shrimp, and provides a framework for a systems approach to management decisionmaking. Chapters present information that can be used to improve ecological efficiencies and the economics of production. Strategies and Tactics for Management of Fertilized Hatchery Ponds explains the systems approach to management. In the future, the most effective hatchery managers will base management decisions on information that is site- and pond-specific. This book provides you with needed information on organic and inorganic fertilizer materials; dynamics of water quality; pond filling schedules; biological control of problem organisms; fingerling production of walleye, striped bass, paddlefish, largemouth bass, and others. Readers find solutions to several common problems and learn about the processes needed to solve others. Chapters help answer questions important to the success and effectiveness of management of fertilized hatchery ponds such as: What kinds or sources of nutrients should be purchased? How much time and water are needed before larvae are stocked? What density and age of fish should be stocked? How can a satisfactory quality of larvae and environmental variables be achieved so that fish survive stocking and initiate normal feeding and growth? Has the initial survival and growth been satisfactory, or should the pond be drawn down and restocked? What kind and how much fertilizer should be added to a given pond? This book provides you with information essential for making hatchery ponds as effective and efficient as possible. Whether you?re a fish hatchery manager, student of aquaculture, or agency or academic researcher involved in hatchery management, you will find Strategies and Tactics for Management of Fertilized Hatchery Ponds an indispensable guide for your daily work and studies.
Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 956
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Book Description
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 560
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Book Description
Author: Matthew Lee Rogge
Publisher:
ISBN:
Category :
Languages : en
Pages : 176
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Book Description
In 2000, inorganic and organic fertilization regimens were evaluated for production of fingerling walleye Stizostedion vitreum in plastic-lined ponds. The control treatment was no fertilizer. Inorganic fertilizer was applied to maintain a targeted 7:1 nitrate-nitrogen to total phosphorus ratio. Organic fertilizer was an equal mix of alfalfa and cottonseed pellets applied weekly. Dissolved oxygen readings were significantly lower in organically fertilized ponds, and pH was higher in inorganic ponds, possibly due to less decomposition of organic matter or increased photosynthesis. There were no significant differences in nitrogen or phosphorus concentrations among treatments. Planktonic crustacean population trends were also similar among treatments; however, copepod populations increased late in the season in fertilized ponds. Ponds treated with organics had significantly larger fish compared to fish from control and inorganically treated ponds. No treatment differences were observed in survival, which was low in all treatments. Results from 2000 suggest organic fertilizers facilitate better walleye fingerling production compared to inorganic or no fertilizer in plastic-lined ponds. In 2001, organic fertilizer was compared to a mix of organic and inorganic fertilizers. Organic and inorganic fertilizer applications were similar to 2000. All ponds were treated with organic fertilizer; ponds in the mix treatment received supplemental inorganic fertilization. Organically treated ponds had similar nutrient values when compared to fertilizer mix; however, water used to fill ponds was initially high in both nitrogen and phosphorus, which may have reduced nutrient differences between treatments. There were also no differences in food base densities or fingerling production between treatments. Planktonic crustacean densities sharply declined in both treatments following fish stocking, indicating larval walleye immediately fed on small crustaceans (Daphnia spp. and copepods). Benthic invertebrate densities were high throughout the season in both treatments, with no differences between them. Stomach content analyses revealed walleye fingerlings consumed small crustaceans throughout the season, with dipteran larvae becoming important once walleyes were [Greater than or equal to symbol]20 mm. Both fertilization treatments produced large fish with good survival. Results from this study suggest benthos management is important in plastic-lined ponds, and high nutrient influx from water sources may reduce requirements for inorganic enrichment in fingerling walleye plastic-lined culture ponds.
Author: John Dobie
Publisher:
ISBN:
Category : Fish-culture
Languages : en
Pages : 24
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Book Description
Author: Patrick Lavens
Publisher: Food & Agriculture Organization of the UN (FAO)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 320
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Book Description
The cultivation of fish and shellfish larvae under controlled hatchery conditions requires not only the development of specific culture techniques, but in most cases also the production and use of live food organisms as feed for the developing larvae. The present manual describes the major production techniques currently employed for the cultivation of the major types of live food commonly used in larviculture, as well as their application potential in terms of their nutritional and physical properties and feeding methods. The manual is divided into different sections according to the major groups of live food organisms used in aquaculture, namely micro-algae, rotifers, Artemia, natural zooplankton, and copepods, nematodes and trochophores.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9789251058954
Category : Business & Economics
Languages : en
Pages : 670
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Book Description
This publication is presented in two parts.
Author: James W. Meade
Publisher: Springer Science & Business Media
ISBN: 1461564700
Category : Science
Languages : en
Pages : 184
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Book Description
Although some nations, such as Japan, have invested in aquaculture research and developed major aquaculture industries, the opportunities for similar devel opment in the United States remain largely unnoticed. In a typical recent year the United States, which claims 20% of the world's marine fisheries resources, imported seafood worth $4. 8 billion and exported $l. 3 billion. In addition to the $3. 5 billion deficit in food-fish, was another $2. 7 billion deficit for nonedible fishery products. Next to oil, fishery products constituted the second highest drain on the United States balance of payments and accounts for a significant portion of the foreign trade deficit. Furthermore, fish consumption has been increasing in North America. In response to the demand for fishery products, aquaculture managers not only have the opportunity to realize economic profit, but in doing so can make an important contribution to reducing the national debt, providing employment, and enhancing our diet. This book might be considered a farm management text for those in aquaculture. It is intended to provide an introduction to aquaculture principles and an introduction to management, including business and people management, microeconomics, and the concepts of efficiency and productivity. I hope it will bridge the gap between conservationists, the academic community, and commer cial culturists. Abundant references should enable the reader to quickly access literature on most topics germane to the management of culture systems.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251316082
Category : Technology & Engineering
Languages : en
Pages : 291
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Book Description
The conservation, sustainable use and development of aquatic genetic resources (AqGR) is critical to the future supply of fish. The State of the World’s Aquatic Genetic Resources for Food and Agriculture is the first ever global assessment of these resources, with the scope of this first Report being limited to cultured AqGR and their wild relatives, within national jurisdiction. The Report draws on 92 reports from FAO member countries and five specially commissioned thematic background studies. The reporting countries are responsible for 96 percent of global aquaculture production. The Report sets the context with a review of the state of world’s aquaculture and fisheries and includes overviews of the uses and exchanges of AqGR, the drivers and trends impacting AqGR and the extent of ex situ and in situ conservation efforts. The Report also investigates the roles of stakeholders in AqGR and the levels of activity in research, education, training and extension, and reviews national policies and the levels of regional and international cooperation on AqGR. Finally, needs and challenges are assessed in the context of the findings from the data collected from the countries. The Report represents a snapshot of the present status of AqGR and forms a valuable technical reference document, particularly where it presents standardized key terminology and concepts.
