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NSERC Canadian Integrated Multi-Trophic Aquaculture Network

Research Projects

Project Title:
Presence, effect of and bioaccumulation of therapeutants in polychaetes (D1P7)


Project Description:
Integrated Multi-Trophic Aquaculture (IMTA) aims to recycle and reuse excess nutrients from salmon aquaculture farms by culturing other commercially valuable species, thereby limiting environmental impacts. Co-culture of the clam worm,  Nereis virens  -  a sediment dweller commonly found in the Bay of Fundy - is being considered as a means to ‘process’ the organic solids that settle out from fish farms. This worm is often sold as bait. Our goal is to determine the effects of the anti-sea lice therapeutant Slice® (active ingredient emamectin benzoate (EB)) to these worms at fish farms where this chemical is used. Ongoing toxicity studies are assessing acute and chronic effects of this therapeutant on the worms. An acute study exposed worms (EB concentrations of 20, 200 and 2000μg/Kg sediment) for 10 days and resulted in no mortality, although some behavioural changes were observed. A chronic study will be conducted in which worm will be exposed to the same concentrations for 60 days. Survival, uptake of EB, and growth will be monitored. This work provides data that will be used to assess the feasibility of culturing worms under salmon farms.
 
(Experimental exposure setup for the calm worm, Nereis virens, a candidate for the organic deposit extractive component of IMTA. - Credits: Geoffrey McBriarty)

Project Leader Name:
Les Burridge, Fisheries and Oceans Canada, St. Andrews Biological Station (SABS), Aquaculture and Biological Interactions Section

Project Leader e-mail Contact:

Team Members’ Names and Affiliations (researchers and students):
Karen Kidd (UNBSJ)
Gregor Reid (UNBSJ/DFO-SABS)
Shawn Robinson (DFO-SABS)
Thierry Chopin (UNBSJ)
Geoff McBriarty (UNBSJ graduate student)

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