Environmental impacts of aquaculture vary depending on the type of organisms grown and the technologies used to grow them. In the 2007 paper Indicators of Resource Use Efficiency and Environmental Performance in Fish and Crustacean Aquaculture, Boyd et al. propose a set of indicators to compare different production techniques.
One important and widely used measure of efficiency is the feed conversion ratio (FCR). The feed conversion ratio describes the efficiency with which an aquaculture production system converts feed into fish biomass. While FCR is informative, it is a relatively crude measure of efficiency which does not take into account factors such as the amount of protein needed to grow different organisms or the source of the protein.
In their paper, Boyd et al. present a more nuanced view by calculating a suite of related metrics that elucidate how water content, waste production and protein sources influence feed use efficiency metrics. The chart below is drawn using the data from table 5 in Boyd et al 2007.
Click on the colored boxes below the chart to view each metrics.
Boyd, Tucker, Mcnevin, Bostick and Clay 2007. Indicators of Resource Use Efficiency and Environmental Performance in Fish and Crustacean Aquaculture. Reviews in Fisheries Science 15:327-360
Use the following code snippet to add this chart to your site:
<iframe padding="10px" height="370px" scrolling="no" src="http://www.andrewstaroscik.com/embed/feedEffmin.html" width="520px"></iframe>