Technical Workshop - Recirculating Aquaculture Systems (RAS) for fish production

23 May 2019 - 9:00am to 25 May 2019 - 5:00pm

As New Zealand’s leading provider of finfish aquaculture science and technology, NIWA is hosting a two day workshop and one day field trip on Recirculating Aquaculture Systems.

Bream Bay recirculating aquaculture system
Bream Bay [Photo: Crispin Middleton]


The use of Recirculating Aquaculture Systems (RAS) is the latest aquaculture development to attract worldwide attention and increasing venture capital investment. With its internationally experienced aquaculture team and kingfish production about to go commercial, NIWA is well placed to offer this exciting learning opportunity.


Presentation sessions - Thursday 23 and Friday 24 May 2019


Main presentation session - NIWA Auckland Head Office - 41 Market Place, Viaduct Harbour, Auckland

Remote Nelson site for Skype presentation – NIWA Nelson Office - 217 Akersten Street, Port Nelson


  • Introduction to recirculating systems
  • Critical considerations to make before deploying these systems
  • Management of recirculating systems
  • Waste management issues
  • Recirculating system component options
  • Economic factors

Keynote presenters:

Dr Tom Losordo – Managing Partner of Losordo & Associates and recent Principal Scientist for Pentair Aquatic Eco-Systems. Dr Losardo has been involved in aquaculture for more than 40 years and has extensive experience in the research, development, design and installation of recirculating systems worldwide. He is a Past President of the World Aquaculture Society and the Aquacultural Engineering Society.


Dennis DeLong – Principal Consultant for Aquatic Technologies International. Mr DeLong has also been involved the industry for some 40 years. He managed aquaculture and aquaponics workshops and training for Pentair Aquatic Eco-Systems from 2011 to 2017 and has 20 years experience in North Carolina designing, building and operating RAS facilities.


Dr Andrew Forsythe – NIWA Chief Scientist for Aquaculture and Biotechnology. Dr Forsythe has a long association with RAS technology including work in Germany and Canada in both marine and freshwater environments. After completing a Doctor of Veterinary Medicine, he provided veterinary services to Canada’s west coast salmon farming industry, then led the adoption of RAS throughout Marine Harvest Canada’s freshwater operations. He has been with NIWA since 2005.


Dr Javed Khan – RAS scientist with NIWA. Dr Khan has a Ph.D in fish physiology and bioenergetics, focusing on the effects of a fish’s environment on physiological performance. He has also completed two post-doctoral studies in Denmark looking at the effects of RAS conditions on salmonid welfare and performance.


Register now View workshop details

NIWA Auckland Head Office
41 Market Place Viaduct Harbour
1010 Auckland