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In: Cat Frederick, Catherine Frederick, Emma Hauser, fish farming, Jesse Trushenski, Lake Talks, RAS, recirculating aquaculture, recirculating aquaculture systems, seafood, sustainable seafood

Many Wisconsinites may be surprised to learn that the state’s agricultural sector includes seafood raised on land, such as Atlantic salmon. Fish farming—also known as aquaculture—here in the U.S. is one way to reduce America’s reliance on imported seafood. Estimates, depending on how they are calculated, indicate that between 65% and 90% of seafood consumed in the U.S. is imported. In addition to this trade deficit, this situation means that seafood often travels great distances to reach your plate.

A free, online panel discussion hosted by Wisconsin Sea Grant will look at one form of sustainable fish farming known as recirculating aquaculture systems. “Fish on land? The growth of land-based fish farming” will take place Thursday, March 17, from 7 to 8 p.m. (central time) as part of Sea Grant’s “Lake Talks” series.

Registration is required and is open now. The hour will include time for audience questions.

Land-based water reuse systems, like the tanks shown here, can provide an optimal, carefully controlled environment for fish to thrive. Pictured here are Atlantic salmon. (Photo: NADF)

Also called RAS, recirculating aquaculture systems use large tanks and efficient reuse of water to raise fish on land. Recently, the U.S. Department of Agriculture has made major investments in furthering RAS research and workforce development, building upon earlier support from the National Sea Grant College Program, part of the National Oceanic and Atmospheric Administration (NOAA).

Attendees of the March 17 panel will learn about cutting-edge aquaculture research and outreach happening in Wisconsin. They will also gain a broader, national view of recirculating aquaculture and how it can help with America’s seafood trade deficit, provide nutritious food and reduce food’s carbon footprint.

Speakers will also address how U.S. fish farming and wild-caught fisheries can go hand in hand to supply sustainable seafood to American consumers. The evening will also touch upon the role that aquaculture plays through fish hatcheries that support recreational and commercial fishing and the recovery of imperiled species.

Panelists are:

  • Emma Hauser, Aquaculture Outreach Specialist/Research Associate, University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility and Wisconsin Sea Grant
  • Dr. Catherine Frederick, Extension Associate for the Recirculating Aquaculture Salmon Network (RAS-N) and Sustainable Aquaculture Systems Supporting Atlantic Salmon (SAS2), University of Maryland Extension and the Institute of Marine and Environmental Technology
  • Dr. Jesse Trushenski, Chief Science Officer and Vice President for Animal Welfare, Riverence; Past President and Fellow, American Fisheries Society

For Lake Talks event and registration information, visit the Sea Grant website, or follow Wisconsin Sea Grant on Facebook or Twitter. You can register for the March 17 presentation now.

For questions about this series, contact Wisconsin Sea Grant science communicator Jennifer Smith.

The post Lake Talks series to explore sustainable, land-based fish farming first appeared on Wisconsin Sea Grant.

Original Article

News Releases | Wisconsin Sea Grant

News Releases | Wisconsin Sea Grant

https://www.seagrant.wisc.edu/news/lake-talks-series-to-explore-sustainable-land-based-fish-farming/?utm_source=rss&utm_medium=rss&utm_campaign=lake-talks-series-to-explore-sustainable-land-based-fish-farming

Jennifer Smith

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In: aquaculture, Chris Hartleb, Emma Wiermaa, fish farming, Greg Fischer, NADF, Northern Aquaculture Demonstration Facility, RAS, saugeye, UW-Stevens Point, UWSP, walleye

Research at UW-Stevens Point Northern Aquaculture Demonstration Facility focuses on out-of-season spawning

Nothing says “Wisconsin” quite like a Friday night fish fry with all the trimmings: rye bread, cole slaw, French fries, and perhaps a cold beer or brandy Old Fashioned. For many people, the star at the center of the plate is crisply battered walleye.

Yet most of the walleye served in restaurants or purchased in grocery stores actually comes from Canada, including a sizable amount from the Canadian waters of Lake Erie, where it is netted by commercial fishermen.

These walleye, raised in a recirculating aquaculture system at the UW-Stevens Point Northern Aquaculture Demonstration Facility, are about a year old. (Photo: UWSP NADF)

One way to increase the availability of this popular fish year-round and have it come from U.S. sources is through aquaculture, or fish farming. Research conducted at the University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility (NADF) and funded by Wisconsin Sea Grant is helping fish farmers get closer to being able to raise walleye year-round in indoor recirculating aquaculture systems.

Said Chris Hartleb, NADF Director and Professor of Fisheries Biology at UW-Stevens Point, “For the past eight years, Wisconsin Sea Grant has provided funding to tackle some of the challenges” related to domesticating walleye (Sander vitreus) and making it suitable for farming. Previous research has examined whether walleye can be raised in tanks and, if so, what the optimal density in the tank is for the fish to thrive, as well as starter feeds for walleye and saugeye, a naturally occurring hybrid of walleye and sauger.  

Hartleb and Greg Fischer, NADF Assistant Director/Research Program Manager, are the lead investigators on a new project funded by Wisconsin Sea Grant in its 2020-22 project cycle.

The project will focus on making walleye eggs, fry and juveniles available year-round through out-of-season spawning triggered by photothermal manipulation. This means carefully controlling the amount of light and the temperature to which the fish are exposed. That way, multiple crops of fish could be produced throughout the year, as opposed to the single time per year that happens in the wild.

Other key players in conducting the research are NADF Foreman Kendall Holmes, an advanced fish technician, and fellow technician Jared Neibauer. Aquaculture Outreach Specialist Emma Wiermaa will communicate research results to the fish farmers who can use them.

For the study, some fish will be exposed to an early “spring” in early February 2021, through warming water and more light. “And then hopefully those fish will be triggered to spawn, and we’ll get eggs by the end of February. And so, if it works, we’ll get juvenile fish probably around April or early May,” said Hartleb.

A control group of fish will spawn on the normal cycle that wild fish would—sometime in April—and a third group of fish will have an extended “winter” (again, due to light and temperature) and spawn late.

While this plan may sound straightforward, it is not guaranteed to work in practice. “It sounds simple enough, since those are the two main triggers for fish to spawn: light and temperature,” said Hartleb. “But some studies have shown”—such as work by Sea Grant’s other aquaculture specialist, Fred Binkowski, involving yellow perch at UW-Milwaukee—“that if you rush them or if you delay them, sometimes the embryos, the offspring, turn out not be viable.”

And not only may embryos die, so may juveniles or early adults, so that’s why it is crucial to grow the fish in the study out to a marketable size of 1 to 1.5 pounds.

Because the NADF team will need to keep producing batches of walleye, they’re working with a range of public and private partners to help them grow the fish out to full size. Those partners include the Max McGraw Wildlife Foundation in northern Illinois and Concordia University Wisconsin in Mequon, which is starting an aquaculture program. Northside Enterprises, a fish farm in Black Creek, Wisconsin, will also participate, and several other farms throughout the state have also expressed interest in raising the young walleye to market size.

Earlier walleye outreach at NADF has addressed topics like showing farmers how to feed-train walleye to consume a commercial diet from hatch. (Photo: UWSP NADF)

Said Fischer, who has worked with walleye in a variety of systems for about three decades, “The capability to spawn walleye out of season in a controlled aquaculture setting is paramount to bringing commercial walleye production to fruition in the U.S. We have got to have eggs year-round for this to be commercially acceptable. This newest project will allow us to move this species into the commercial aquaculture production sector in the Midwest.”

As with other NADF projects, outreach is a key component, with Wiermaa—whose position is jointly supported by Wisconsin Sea Grant—leading efforts to share NADF research with fish farmers throughout the state.

Said Wiermaa, “Making our projects results accessible and presenting them in ways that are useful to farmers is just as important as the research results themselves.”  This can take a number of forms, including fact sheets, manuals and videos.

Aquaculture Outreach Specialist Emma Wiermaa holds a walleye at the facility in Bayfield, Wis. (Photo: UWSP NADF)

Wiermaa has noted high interest among Midwest fish farmers looking to raise walleye commercially as a food fish. “To respond to these requests for assistance, the Northern Aquaculture Demonstration Facility recently completed a technical video series on raising walleye intensively in water reuse systems. The series compiles nearly a decade of research, and it is accessible online. Results from this newest project will be added to this video series and other outreach tools.”

Ultimately, the NADF team hopes that the research will result in more Wisconsin- and U.S.-raised fish on diners’ plates, and help expand Wisconsin’s aquaculture industry, which is currently a $21 million business that represents about 500 jobs.

“Every time we’ve concluded one of our projects, there’s just tremendous interest [from fish farmers] throughout the Upper Midwest. I think people realize that walleye are a great-tasting fish. And it’s a high-value fish, so it gets a good price on the market,” said Hartleb.

Original Article

News Releases – Wisconsin Sea Grant

News Releases – Wisconsin Sea Grant

https://www.seagrant.wisc.edu/news/new-walleye-study-at-uwsp-nadf/

Jennifer Smith

On:
In: aquaculture, aquaponics, Atlantic salmon, Emma Wiermaa, Greg Fischer, RAS, RAS-N, recirculating aquaculture, Salmo salar, workforce development

Sea Grant effort will support growth of land-based salmon industry in U.S.

 

Meeting attendees from across the country got a true taste of a northern Wisconsin winter at the inaugural meeting for a Sea Grant-funded effort to support the sustainable development of the land-based Atlantic salmon industry in the U.S.

As the gathering kicked off in Washburn in December, the mercury read a nippy 6 degrees Fahrenheit, with subzero wind chills. Yet energy levels inside the Harbor View Event Center were high as approximately 50 attendees began laying the groundwork for a robust collaboration that was dubbed RAS-N, for “Recirculating Aquaculture Salmon Network.”

The effort is being funded as part of a larger package of $16 million in federal aquaculture grants announced in September 2019 by the National Sea Grant Office.

Participants at the meeting included Sea Grant staff from Maryland, Maine and Wisconsin, as well as the National Sea Grant Office; National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Agriculture (USDA) and U.S. Fish and Wildlife Service staff; and representatives from private industry, including feed and salmon producers.

Maryland Sea Grant is leading the three-year project to identify and address challenges faced by the land-based Atlantic salmon (Salmo salar) industry. The Wisconsin and Maine Sea Grant programs are partners in the multistate consortium. The project builds upon earlier Sea Grant investment in this area, including research based in Wisconsin.

The December event spanned two full days of presentations and discussion. It also featured a tour of the University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility (NADF) in nearby Bayfield. Attendees observed various NADF research projects with Atlantic salmon and other fish species.

Emma Wiermaa, an aquaculture outreach specialist with Wisconsin Sea Grant and NADF, and Greg Fischer, assistant director and research program manager at NADF, played major roles in organizing this productive event.

Said Fischer, “I was very impressed by the commitment of the group, who showed up in the middle of a good old-fashioned Wisconsin snowstorm. Even with record-setting low temperatures, many expressed how glad they were that they came, some from as far as Europe.”

Growing the economy—and the workforce

As one of the conference speakers noted — Brian Peterson of the USDA’s National Cold Water Marine Aquaculture Center in Maine — seafood represents the United States’ largest trade deficit of any agricultural product. And, as David O’Brien, acting director of the NOAA Fisheries Office of Aquaculture, told the group, “Wild fisheries alone cannot meet the increasing demand for seafood.”

This sets the stage for sustainable U.S. aquaculture to help meet the world’s demand for seafood while growing a sector of the U.S. economy.

Emma Wiermaa, aquaculture outreach specialist with Wisconsin Sea Grant and the University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility. (Photo: Jim Gill)

As Wiermaa observed, “Land-based, water reuse systems for growing Atlantic salmon allow the fish to be raised close to market, with limited impacts on the surrounding environment. The result is fresh, local filets for consumers.”

Wisconsin-based Superior Fresh is already having success in this arena as the country’s first land-based Atlantic salmon producer and world’s largest aquaponic farm. Said Chief Science Officer Steve Summerfelt, 99.9% of the facility’s water flow is recycled, and there is zero discharge to surface water. Superior Fresh currently employs more than 70 staff and is expanding.

Representatives from Riverence, Whole Oceans and American Salmon — other private entities currently in this space or preparing to launch facilities — also presented.

Several speakers addressed the educational and workforce development aspects of the industry.

Scarlett Tudor of the University of Maine’s Aquaculture Research Institute described her campus’ approach to fostering the future aquaculture workforce. By placing paid interns in companies, the university helps students build their resumes while conducting research for industry that may not otherwise be possible. The university is also interested in reaching noncredit students. As Tudor noted, hands-on experience is key in the aquaculture world, and not everyone needs a degree for their particular career path.

Wiermaa noted that NADF hosts one or two student technicians at a time, and more than 90% of those techs find aquaculture positions after their stint in Bayfield is over. UW-Stevens Point is a leader in aquaculture education. It is the first accredited university in Wisconsin to offer an aquaculture minor (which is still uncommon in U.S. colleges) and the first in the country to offer full-semester aquaponics courses, a master class and professional certificate program.

Aquaculture manager Kyle Woolever handles young Atlantic salmon at Wisconsin-based Superior Fresh, an aquaponic farm raising leafy greens along with fish. (Photo: Sara Stathas)

Fish health, biosecurity, consumer perceptions and other topics were also addressed during the wide-ranging meeting. The aim of this gathering was to bring together a small, focused group of stakeholders to get the project off the ground.        

Said Summerfelt, “I’m excited that Sea Grant has supported RAS-N, which has brought together land-based salmon stakeholders–producers, suppliers, trainers of the workforce, and academics—for the first time. With this kickoff meeting in Washburn, we have begun preparing a roadmap to address our needs and gaps in knowledge to reduce risk and increase production efficiencies, as well as consumer awareness. RAS-N is providing a terrific venue for collaboration.”

Future steps in 2020 will be a RAS-N session at the Aquaculture America conference in Honolulu in February, and a fall gathering at the Institute of Marine and Environmental Technology in Baltimore. Organizers expect to invite a larger group of stakeholders to the Maryland meeting as the collaboration continues to take shape.

Original Article

News Releases – Wisconsin Sea Grant

News Releases – Wisconsin Sea Grant

https://www.seagrant.wisc.edu/news/salmon-aquaculture-project-kickoff/

Jennifer Smith