Sustainable Aquaculture Projects, Research, Education and Technology Advancements
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Summer Newsletter 2021
Highlights of Projects, Staff & Facility News

University of Wisconsin Stevens Point
Northern Aquaculture Demonstration Facility 


Commercial Application of Out-of-Season Spawning of Walleye 
UWSP NADF is currently conducting key commercial production spawning cycles for in-house walleye broodstock using out-of-season spawning practices to control the reproductive cycle, irrespective of the season. This project looks to enable year-round production of walleye eggs and fry, an important next step for commercial walleye aquaculture. The walleye broodstock at UWSP NADF were cued for spawning this spring and their eggs and progeny are currently being compared to wild walleye eggs and fry raised in replicated systems.

The progeny from the broodstock groups were raised indoors on commercial feeds in the facility's intensive production system, and have now been transferred into a recirculating aquaculture system for continued growth. Learn more about this project. 

Comparing Pond Reared to Intensive Reared Fish for Stocking
UWSP NADF is collaborating with Red Cliff Tribal Fish Hatchery, Wisconsin DNR, The Great Lakes Indian Fish and Wildlife Commission and Lake Namakagon Lake Association for the production of walleye for stocking.  Walleye are being cultured at UWSP NADF in four, half acre clay lined ponds as well as indoors on commercial feed in the facility’s intensive larval rearing room. Both extensive and intensively raised fish will reared to extended fingerlings (>6 inches), fin clipped and stocked into Lake Namakagon for future survival comparison between groups.

To track fish growth and fitness, UWSP NADF samples fish for length and weights regularly. Each week young walleye can double their weights, therefore it is crucial to sample young fish often to best manage feed rates and densities. Picture at right compares sizes of intensive walleye (top) and pond raised walleye (bottom) at 30 days post hatch. Smaller sizes of pond cultured walleye may be due to factors such as temperatures and feeding rates, which generally can be better controlled in indoor systems. 


Overcoming Barriers to Land-based  Atlantic Salmon Production
UWSP NADF just released a short film regarding a project funded by the National Sea Grant program,  which looks to overcome two significant barriers to raising Atlantic salmon in indoor, water reuse systems. With the incredible benefits to raising Atlantic salmon in recirculating aquaculture systems, including water re-usage, high control over the fish rearing environment, effective capture of waste, and ability to build systems close to local markets, there still remains several significant barriers that are limiting industry growth in this sector. UWSP NADF and partners have investigated two of these barriers. Learn more in the project film...


UWSP NADF Aquaculture Summer Internship Experience- Cole Weede

"I am incredibly excited for this internship because it feels like an educational catalysis for my career ambitions.  A list of my personal interest could go on forever, but I am an aquatics enthusiast and I have grown to be super passionate about walleye and salmon because I have learned of their significance in the long natural history as part of the diet and lifestyle of a large variety of Northern cultures across the globe.  The cultural significance of these fish has rubbed off on me and has cause me to become very passionate about them even though I know very little about them.  I can't wait to start the internship to be in the loop and to learn from everyone here, like I said I have so much to learn.” -Cole Weede

As a UWSP NADF intern, Cole is assisting with the facility's research and demonstration projects, learning techniques of raising both cool and cold water species at various life stages including walleye, Atlantic salmon, lake trout and Arctic char. This  experience also includes working in various culture systems; ponds, raceways, recirculating, incubation and larval systems.

UWSP NADF also collaborates with partnering facilities to co-host summer interns, such as  UWSP student, Grace Eide (in photo at right). Grace is gaining skills and experience in recirculating aquaculture systems and salmon culture at the nation's largest aquaponics facility, Superior Fresh, in Hixton, Wisconsin.
Learn more about UWSP aquaculture and aquaponics educational opportunities...


Lisa Yolitz has been with the facility since 2006 as the Office Operations Associate. 
With a degree in Computer Science and recognizing the significance of aquaculture advancement, Lisa Yolitz manages the daily operations budget and financial grant details for all NADF projects. While monitoring utilities, professional services, and equipment needs, Lisa plays a significant role in maintaining NADF infrastructure to keep the facility running efficiently. 

Working behind the scenes, Lisa has been highly important to the facility's success and sustainability while continuously providing support, dedication and passion towards UWSP NADF mission, vision and goals.


"Through projects, publications and internships, UWSP NADF is a pioneer in aquaculture with a strong reputation in excellency of obtaining vital information for new ways of doing things in the aquaculture field. The win-win for me is all staff and our NADF Directors are passionate about their work and just as dedicated in a field that is growing offering valuable resources to promote aquaculture worldwide. Now it has been fifteen years and I am proud to say I have served a role in UWSP NADF’s vision to reality.  I look forward to our continued projects in discovery and in the promotion of aquaculture."

UWSP NADF is looking for partners to collect information on survival and growth of arctic char in their systems. UWSP NADF is the only facility in the U.S. that holds this strain, showing to be very fast growing. The fingerlings are 3-4", and $0.50/fish. See flier for more information...

  • Aquaculture America 2021 August 11-14, San Antonio, TX. Aquaculture America returns to one of the favorite tourist spots in the world for the only major national aquaculture conference and exposition held in the U.S. The U.S. Aquaculture Society (formerly U.S. Chapter of WAS) joins with National Aquaculture Association and the Aquaculture Suppliers Association to produce the annual Aquaculture America meetings. This conference will also have the largest aquaculture trade show in the Western Hemisphere and one of the largest anywhere in the world with nearly 200 booths. Learn More/Register

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