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Second prix du concours par affiche pour Pierre-Olivier Fontaine

Pierre-Olivier Fontaine, Maîtrise, University Center of the Westfjords (Islande)

Supervision : Peter Krost (University Center of the Westfjords) et Éric Tamigneaux (Cégep de la Gaspésie et des Iles)

Pierre-Olivier s’est vu remettre le second prix du concours des affiches scientifiques lors de la conférence du World Aquaculture Society (WAS) qui s'est tenue dans la ville du Cap, en Afrique du Sud, en juin dernier. Il recevra une bourse de 400 $ et son affiche sera mise en valeur dans le magazine World Aquaculture ainsi que sur le site web du WAS.

Toutes nos Félicitations!

Voici le résumé de l’affiche présentée lors du congrès :

Co-culture of blue mussel mytilus edulis and sugar kelp saccharina latissima: exploring the potential effect of seaweeds in deterring the effect of duck predation on mussels, Cascapedia bay

Mussel farming is a well-established industry in eastern Canada that has become, over the last 45 years, an economical pillar for coastal communities. However, production is not consistent, and many factors such as duck predation can influence profitability. In order to reduce the predation rate of diving ducks on blue mussel (Mytilis edulis) farms in Cascapedia Bay, a collector of sugar kelp (Saccharina latissima) and an artificial algae line were introduced above the mussel’s fertilized rope, aiming to act as a visual shield. The survival rate, thus indirectly the predation rate, was calculated by comparing both treatments at 2 specific times: before the ducks arrival and following their departure. The seaweed yield harvested in June 2017 was significantly lower than regional yield obtained in the past (more than 100 fold difference), with an average yield of 25,26gr/m. While no difference was observed between treatments preceding the ducks arrival in the amount (p>0,1), the weight of mussels per linear meter (p>0,3) and the length(p>0,2), a significant increase of weight of mussels per linear meter in favor of the artificial algae treatment was found (p= 0,02008) after the ducks departure. Although this experiment is believed to represent a valid starting point to explore the possibility of introducing co-culture as a way to financially protect mussel farmers, it does not represent, as of yet, a profitable solution to protect the lines from predation as the yield was not found to be sufficient to sustain the producers.