Author: Lloyd Michael Harding
Publisher:
ISBN:
Category :
Languages : en
Pages : 258

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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: David A. Culver
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages :

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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: Peter C. Jacobson
Publisher:
ISBN:
Category : Fishery management
Languages : en
Pages : 14

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Book Description

Author: Ron Zitzow
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 8

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Book Description

Author: A. A. Arsenault
Publisher: Saskatoon : The Laboratory
ISBN:
Category :
Languages : en
Pages : 58

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Book Description

Author: Christopher Paul Clouse
Publisher:
ISBN:
Category :
Languages : en
Pages : 268

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Book Description

Author: Justin L. Wilkens
Publisher:
ISBN:
Category : Walleye (Fish)
Languages : en
Pages :

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Book Description
Temperature-dependent weight gain of Gulf coast and northern strain walleye Sander vitreus fingerlings was determined by rearing fish in flow-through aquaria at different water temperatures (range 15-32°C). Maximum growth of Gulf coast and northern strain walleye occurred between 20 and 26°C, and weight gain of northern walleye exceeded that of the Gulf coast strain by 1.5 times. An acclimated chronic exposure method to assess upper thermal limits determined that walleye survived 35, 9, and 1 days at 33, 34, and 35°C, respectively. A post pond-rearing feed-training practice (21 d) at a mean density of 6,290 ± 1,247 fish/m3 using formulated feeds was successful (32-85% survival), and walleye continued to consume a formulated diet feed after stocked at densities of 12,250 and 24,700/ha into 0.04 ha earthen ponds. After 125 days, survival in ponds was poor (

Author: Charles C. Mischke
Publisher: John Wiley & Sons
ISBN: 0470959223
Category : Technology & Engineering
Languages : en
Pages : 312

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Book Description
Ponds are a primary production system to a wide variety of freshwater fish species. Each species have specific and unique nutrient needs and successful pond fertilization is critical to a successful aquaculture enterprise. Aquaculture Pond Fertilization: Impacts of Nutrient Input on Production provides state-of-the-art information for successful fertilization strategies for a broad range of pond-raised species. Aquaculture Pond Fertilization attempts to rectify the seemingly contradictory nutrient recommendations by clearly defining the goals of specific types of aquaculture. Chapters are divided into three sections: The first reviews basic concepts in fertilization applicable to all pond-based production. The second looks at specific nutrient management approaches. The third and final section of chapters looks specifically at key freshwater pond species ranging from tilapia to perch and discusses specific fertilization needs for the successful rearing of these in-demand fish. Looking across species with chapters contributed by leaders in the field Aquaculture Pond Fertilization provides succinct single-volume coverage of an oft-neglected, but vitally important topic in aquaculture production.