Pre trial of growth performance and nutrient uptake of dulse (Palmaria palmata) cultivated in commercial Atlantic salmon Recirculating Aquaculture System (RAS)

Summary

The study investigates the potential of using dulse (Palmaria palmata), a red macroalgae, to reuse nutrient-rich
discharge water from salmon recirculating aquaculture systems (RAS). Dulse growth was measured in three
treatments: 100% seawater (control), 25% RAS discharge water + 75% seawater, and 100% seawater with
Guiliard’s F2 nutrient solution added over a 64-day period. Dulse grew significantly better in 25% RAS discharge
water, increasing in biomass from 2.08g to 5.06g. The study demonstrates that dulse can successfully grow in
RAS discharge water and contribute to bioremediation, reducing environmental risks like eutrophication. This
highlights the potential of integrating macroalgae into RAS systems for sustainable nutrient recycling and highvalue biomass production.

Read publication here:

NVA : hdl.handle.net/11250/5326767