Dedicated To Tribal Aquaculture Programs
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March 2006 ~ Volume 55 | ||
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Topics Of Interest:
* UW- Stevens Point Northern Aquaculture Demonstration Facility
UW- Stevens Point Northern Aquaculture Demonstration Facility
By: Gregory J. Fischer, Facility DirectorThe new UW- Stevens Point Northern Aquaculture Demonstration Facility would like to invite all the area Tribal Fish Hatcheries/Aquaculture programs to explore how the facility may be able to assist their programs.
The facility is able to offer hands on training in old and new hatchery/aquaculture practices and systems. Please review the following summary of the facility and feel free to contact us at
715-779-3461 or email gfischer@uwsp.edu.
UNIVERSITY OF WISCONSIN-STEVENS POINT
NORTHERN AQUACULTURE DEMONSTRATION FACILITY (NADF)
This state-of-the-art aquaculture demonstration and research facility is located near Red Cliff, Wisconsin. The facility boasts an 8,500 sq. ft. aquatic production barn, with wet lab, office, mechanical, storage, and aquatic production areas. The Northern Aquaculture Demenstration Facility (NADF) is capable of raising warm, cool, and coldwater fish species demanding various needs. The rearing facilities include a bell jar incubation system, a heath tray incubation system, several 10,000-12,000 gallon recirculation aquaculture systems (RAS) and a hydroponic plant rearing area. Cold, 46 degree F water is supplied by two high capacity wells capable of up to 1600 gpm if needed. A combination 1,600 sq. ft. tractor shed/well/headtank building provides storage for equipment, one high capacity well, water supply headtank with degassing system, hot water boiler and heat exchanger systems, walk in freezer, rotary air blower, and dry storage area. An additional 200 sq. ft. well building houses the second high capacity well.
Outside, the facility has four one-acre drainable rearing ponds complete with water supply, air line supply, drain funnel, and an external screened, concrete, fish-collecting basin. Additionally, the facility has two 3’x 60’ concrete raceways and two effluent settling basins. The entire system is controlled by a SCADA computerized system which monitors pumps, aquifer levels, water usage, and security issues.
What is the Facilities Mission?
The mission of the NADF is to promote and advance the development of commercial aquaculture in a northern climate by:
- Providing a site where production scale aquaculture can be demonstrated
- Offering hands-on training and workshops in modern aquaculture techniques and strategies
- Conducting applied research projects on promising technologies and techniques in commercial aquaculture
- Providing educational outreach and information on all aspects of the science and business of aquaculture
How Can the NADF Assist Me?
The NADF will help with technical problems, provide training and educational materials, demonstrate aquaculture technologies with a hands-on emphasis, provide additional aquaculture contacts, and conduct applied research based on actual needs. The staff of the facility will work with the aquaculture industry, tribal, state, federal agencies and the general public to identify needs, conduct training/research, and to disseminate pertinent aquaculture information in a suitable fashion.
What is the Facility doing now?
- In 2005, the NADF completed incubation and raising yellow perch in conjunction with the Bad River and Lac Du Flambeau Natural Resources Departments. This project was done to develop and practice perch rearing strategies and to test incubation equipment at the facility.
The NADF is working on several projects that began in 2005. They include:
- Incubating and rearing extended growth (6”) walleye in outdoor rearing ponds for the LCO Tribal Conservation Department. This demonstrates pond rearing practices for coolwater fish species.
- Commercial rearing of yellow perch in an indoor recirculating aquaculture system (RAS). This research is funded by a grant from USDA and in conjunction with the UW-Milwaukee Water Institute.
- Commercial rearing of several strains of brook trout to compare growth and performance between strains and feed types.
- Commercial rearing of baitfish utilizing RAS. This research is in the process of acquiring funding through the North Central Regional Aquaculture Center (NCRAC) and will be started in 2006. This project is in conjunction with UW-Madison and Minnesota Sea Grant.
- Startup of an aquaculture education class at the local Bayfield High School in cooperation with the school district and Department of Public Instruction.
- Participation in UW-Madison study of treatment resistant bacterial populations in aquaculture facilities.
- Internships with local high school students and college students.
- Hiring of full and limited term aquaculture technicians for the facility.
- Conducting tours of facility to interested personnel and groups, with over 200 people through the door this summer!
- Articles and updates in newspapers, magazines, and on webpage.
To schedule a tour, or for more information, contact:
Gregory Fischer, Facility Director
Phone: 715-779-3461
Email: gfischer@uwsp.edu
http://www.uwsp.edu/cls/aquaculture/
Disinfection of Fish Eggs - A Practical Method
By: Kenneth L. Riley, Fish Farming NewsManaging aquatic animal health is key to the success of any aquaculture operation. In a hatchery facility, when a healthy environment is maintained through proper diagnosis and treatment of diseases, a continuous supply of fish eggs and larvae can support year-round production of fish.
While biosecurity plans and best management practices help prevent the spread of disease throughout production facilities, a few simple steps can help prevent the vertical transmission of disease from broodstock to eggs and larvae. Whether the eggs are received from outside the hatchery or produced on-site, they should be disinfected to prevent the spread of disease in the hatchery facilities.
A number of methods have been developed to disinfect fish eggs. These methods include using solutions of formalin, hydrogen peroxide, iodine, methylene blue, ozone, benzalkonium chloride (RoccaP) or sodium hypochlorite (beach). Many of these solutions are highly effective against gram-positive and gram-negative bacteria and fungi.
Iodine and formalin are the most common solutions used. Formalin is effective against grain-negative bacteria and fungi at concentrations to 100 mg/I but becomes toxic to eggs and developing embryos at the higher concentrations required to kill gram-positive bacteria.
To date, the use of iodine or iodophores remains the most effective egg disinfectant for eliminating
the transfer of gram-positive and gram-negative bacteria, fungi and some viruses.The term iodophores refers to commercial forms of iodine. Iodophores are organic compounds that release flee iodine and are generally available in 1% (10,000 mg/I) solutions. It is important to be aware of the concentration of the compound. Commercially available iodophores are Argentyne®. Betadine®. Ovadine® and Wescodyne®. These products are considered highly effective bactericides and virucides.
Caution should be used in disinfecting eggs that are near hatching because the concentrations of iodine will be toxic to the emerging larvae. The research staff at Harbor Branch Oceanographic Institution’s Aquaculture Division disinfect freshwater and marine fish eggs at neurula stage with a 10-minute bath treatment at 100 mg/I of free iodine.
The recommended volume of
eggs to disinfectant solution is 1:10. A 100 mg/L iodine concentration is
equivalent to a 1:100 dilution of solution (use 38 ml, or 1.28 fluidounces or
7.5 teaspoons per gallon of water).
Sodium bicarbonate (baking soda) should be added as a buffer at 3.7 grams per gallon if water is low in alkalinity and hardness (less than 75 mg/ CaCO3). Gently mix eggs and disinfectant to ensure that all egg surfaces are treated. Eggs should be treated for 10 minutes. Thoroughly rinse the eggs with clean water to remove iodine residue before putting them into incubators or hatching jars. Throughout the disinfection process, attention should be given to minimize temperature fluctuations and prevent temperature shock to the eggs. Any dead or unfertilized eggs should be removed to minimize growth of bacteria or fungi during incubation.
A POND MANAGER DIAGNOSTICS TOOL - AquaPlant
By: Texas Cooperative Extension
AquaPlant was designed to help pond owners and their advisors in the identification and management of aquatic vegetation. Aquatic vegetation management can be a perplexing problem. The first part of that problem is proper identification. Management of most aquatic plant species depends on properly identifying the desirable or nuisance plant. If you already know the aquatic plant that needs management, then you want to proceed to Management Options.
Components of this web site include:
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| Alligator Weed Bladderwort Bull Tongue Common Duckweed Curly-Leafed Pondwed Fanwort Giant Salvinia Lizard's Tail Nitella Sago Pondweed Southern Naiads Three-Square Waterleaf Water Pennywort White Water Lily |
American Lotus Blue Flag Common Reed Eelgrass Filamentous Algae Horsetail Maidencane Parrotfeather Sedges Southern Watergrass Torpedograss Watermeal Water Primrose Widgeon Grass |
Arrowhead Brittle Naiads Buttonbush Common Salvinia Egeria Frog's-Bit Hydrilla Mosquito Fern Pickerelweed Smartweed Spatterdock Variable-Leaf Pondweed Water Hyacinth Water Shield Willow |
Banana Lily Bulrush Cattail Coontail Eurasian Watermilfoil Giant Duckweed Illinois Pondweed Muskgrass Planktonic Algae Soft Rush Spike Rush Vairable-Leaf Watermilfoil Water Lettuce Water Stargrass Yellow Water Lily |
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Product and company names mentioned in this publication are for informational purposes only. It does not imply endorsement by the MTAN or the U.S. Government. |
