Farmed production of Atlantic salmon exceeds that of other farmed salmonids with a total supply of two million tonnes in 2013 (Giskeødegård & Tønnesen, 2014). Atlantic salmon has been subjected to intensive genetic selection for rapid growth since the 1970’s, and it is indisputable that artificial selection has played a major role in the success of the salmon aquaculture industry (Bentsen & Thodesen, 2005). According to Gjedrem (2010), the estimated genetic gain for growth rate has been approximately 14% per generation, with a benefit/cost ratio estimated at 15/1. However, in the poultry industry, rapid muscle growth has been associated with atrophy of fibres and loss of connective integrity and soft texture.