Integrated Multi-Trophic Aquaculture

I came across this interesting article on the Globe and Mail website which is based upon the integrated ecosystem approach that was featured on this site previously (“Integrated ecosystem approach to aquaculture”, 12 Sep 2008). 

 Please refer to the following link for further information. 

http://www.theglobeandmail.com/servlet/story/LAC.20080924.LFISHFARM24/TPStory/Environment

In it, the Canadian concept of “Integrated Multi-Trophic Aquaculture” was discussed in which the research is conducted using a salmon farm.  The approach entails growing a number of species within a multi-level system that functions to balance and optimise bio-chemical processes. 

This process is based on recycling, using excreted by-product wastes as inputs for another.  In this case, one fed species being salmon are fed pellets (composed of marine-material).  Following this, the fish waste solids are filtered prior for usage as fertiliser for field crops whilst the waste water is used for wasabi, watercress and algae.  To complete the cycle, the algae are converted into feed supplement for alternate species grown in Swift’s aquaculture farm. 

This approach has been proven in terms of being biologically feasible however further investigation into the economic, such as profitability, and social facets, such as consumer attitudes, must be conducted.  All in all, the preliminary results look promising for sustainable future aquaculture efforts.

For further information please refer to the following:  

http://www.euraquaculture.info/files/ridler_et_al_2007_gaa.pdf

Tags: canada, multi-trophic
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