RAS Talk Podcast

We started a podcast in 2020 as a new way to engage stakeholders and extend our work on land-based recirculating aquaculture systems. The podcast is produced in partnership with Annex Business Media, the publisher of aquaculture industry publications Hatchery International, Aquaculture North America, and RAStech. Freshwater Institute director Dr. Brian Vinci co-hosts the podcast with the editor of Hatchery International and RASTECH publications. Together they tackle the important issues in land-based recirculating aquaculture systems with prominent industry leaders. Click below to listen the most recent episodes.
February 7, 2022

Aquaponics is often described as the combination of recirculating aquaculture with hydroponics. Many favour it as the ultimate circular food production system, utilizing waste from the production of fish to be used as nutrients for the production of plants like leafy greens and tomatoes. In our world today, the aquaponics model is still appealing and is an example of the circular food systems that we’ll need for a sustainable future.

Currently, there are a few moderate to large aquaponics operations running in the U.S.: Superior Fresh in Wisconsin, Springworks Farm in Maine, and Traders Hill Farm in Florida. In this episode of RAS Talk, co-host Brian Vinci, director of the Conservation Fund’s Freshwater Institute, sat down to talk all things aquaponics with Tracy Nazzaro, principal and president for Traders Hill Farm.

Guest: Tracy Nazzaro

December 23, 2021

Past RAS Talk episodes have had a particular focus on various salmon and trout species because they’re known to be some of the more ‘established’ aquaculture species in Europe and North America. However, globally, barramundi, also known as Asian sea bass, is an aquaculture-established species. Production is especially established in Australia, where MainStream Aquaculture, said to have the largest warm water aquaculture farm of its type and is also the largest Barramundi fingerling supplier in Australia and the world, has its five facilities. In the final RAS Talk episode of 2021, Dr. Paul Harrison, co-founder and chief scientist at MainStream Aquaculture gives listeners a peak into the aquaculture industry in Australia and MainStream Aquaculture’s operations.

Guest: Dr. Paul Harrison

October 25, 2021

Looking to raise awareness and educate Americans on the benefits of regularly eating seafood to achieve a healthier diet, as well as advocate for the recirculating aquaculture systems (RAS) sector and aquaculture industry to achieve an overall more environmentally-friendly and sustainable seafood industry, Linda Cornish, Founder and President of the Seafood Nutrition Partnership (SNP), sat down with hosts Catarina Muia and Brian Vinci for this episode of RAS Talk. Linda discussed the important goals the SNP is looking to achieve, and how the RAS sector and aquaculture industries can help achieve these goals.

Guest: Linda Cornish

October 8, 2021
Public fish hatcheries have a long history in North America, with many culture methods and innovations used in today’s commercial aquaculture industry, first developed at public fish hatcheries. This includes water reuse. While water reuse was initially very basic, as the understanding of fish biology and water quality increased, so did the ways in which water was treated for reuse. Some of the first water reuse systems that included a biofilter and oxygenation, were built at public fish hatcheries. These basic RAS were predecessors to the intensive RAS used in today’s commercial operations.

There are a good number of water reuse systems and intensive RAS at public fish hatcheries today, but few public fish hatchery programs have adopted intensive RAS like the Alaska Department of Fish and Game. During this episode of RAS Talk, Alaska Department of Fish and Game’s Jeff Milton, Sport Fish Hatchery program supervisor, and Travis Hyer, Ruth Burnett Sport Fish Hatchery manager, give us some insight on how their public hatcheries have successfully moved toward RAS.

Guests: Jeff Milton and Travis Hyer

August 30, 2021
The RAS-produced Atlantic salmon sector has come a long way since its inception in the late 1990s, with the industry has continuously striving for success. However, it took time to get the technology there, with RAS technological components evolving greatly in the past 20-23 years. Today, we continue to improve technology and RAS facilities to produce high-quality Atlantic salmon, but must look at the biology of Atlantic salmon as well, focusing on genetic improvements to the eggs to create quality stock, as well as avoid diseases, mass mortalities, and early maturation. In this episode of RAS Talk, co-hosts Catarina Muia and Brian Vinci speak with Dr. Jónas Jónasson, Production Director at BMK Genetics & CEO at Benchmark Genetics Iceland, and Christopher Good, Director of Research at the Conservation Fund Freshwater Institute, to see how the industry is prioritizing and moving forward with the improvements of Atlantic salmon genetics.

July 30, 2021
With much talk, research and new projects circulating the land-based shrimp production sector, RAS Talk was curious to gain perspective from a shrimp recirculating aquaculture system (RAS) professional. Patrick Wood, global consultant and expert on shrimp production technology and innovation, sat down with RAS Talk hosts Catarina Muia and Brian Vinci, to discuss the current technologies being utilized in the land-based shrimp production sector including RAS technologies, the necessary areas of improvement in RAS for shrimp production, where the land-based shrimp production industry is headed, and more.

June 21, 2021
This week, RAS Talk host Brian Vinci had the opportunity to speak with Yonathan Zohar, Professor and Chair of the Department of Marine Biotechnology at the Institute of Marine and Environmental Technology (IMET), University of Maryland, Baltimore County and Director, Aquaculture Research Center at IMET, as well as Program Leader of Recirculating Aquaculture Salmon Network (RAS-N). With more than 40 years in the marine biology industry, Yonathan discusses the use and combination of biotechnology with RAStech, the importance of project RAS-N and its potential outcomes, as well as the projects he and his team have had the opportunity to work on, at IMET.

May 17, 2021

In this episode, hosts Mari-Len De Guzman and Brian Vinci talk with Árni Páll Einarsson, CEO of Matorka, a pioneer in land-based production of arctic char based in Grindavik, Iceland. Einarsson talks about his company’s journey through its RAS production and the opportunities for sustainable seafood production in Iceland.

Guest: Árni Páll Einarsson, CEO, Matorka

April 22, 2021

Bridging the gap between seafood producers and consumers is key to pushing the agenda of sustainability in the aquaculture industry. In this episode, hosts Brian Vinci and Mari-Len De Guzman speak with sustainable seafood advocate Jennifer Bushman about some of the practical and meaningful ways seafood producers can engage their consumers.

Guest: Jennifer Bushman, sustainable seafood advocate and educator

March 18, 2021

Feeds are a critical component of any RAS production environment – it can make or break the health of both fish and systems. This episode provides a variety of perspectives when it comes to fish feeds in closed containment, land-based aquaculture. Co-hosts Mari-Len De Guzman and Brian Vinci hash out the details of diets made for RAS.


John Ng, president, Hudson Valley Fish Farm

Kim Schøn Ekmann, senior product developer, BioMar

George Nardi, VP of aquaculture services, Innovasea