Table 1. Details of feeding period and tank replicates for the feeding trials.

The base diet was manufactured by Biomar and described in three terms: the product range name (CPK), the pellet diameter and the oil to protein ratio. The control and experimental diets were designed to be iso-nitrogenous and iso-lipidic. YCW = yeast cell wall extracts. FOS = fructooligosaccharides.

	Trial#1	Trial#2
Dates	September 2010	September 2011
Base diet	CPK 3mm 24/46	CPK 3mm 24/46
Experimental diet	0.4% YCW + 0.1% FOS	0.4% YCW + 0.1% FOS
Feeding period	7 weeks	4.5 weeks
Tank replicates	6	4
Average fish weight, initial / g	230	316
Average fish weight, final / g	350	350