TABLE 1.

Breeding objectives, heritabilities (h2), and genetic gains for the Tasmanian Atlantic salmon breeding program

Trait type	Trait	h2 (se)	Selection pressure	Cumulative gains to 2015 YC	Mean annual gains	Model
Primary	Acquired AGD resistance	0.36 (0.02)	38%	29%	3.7%	AGD
Primary	Harvest weight	0.44 (0.02)	25%	29%	3.6%	Weight
Secondary	Innate AGD resistance	0.16 (0.01)	13%	0%	0%	AGD
Secondary	Marine maturation	0.20 (0.02)	13%	2%	0.2%	Maturation
Secondary	Flesh color	0.65 (0.04)	13%	7%	0.9%	Quality
Monitor	Flesh fat content	0.28 (0.03)	0%	−5%	−0.6%	Quality

Genetic gains are expressed as improvement from founder stocks (Tasmanian landrace) and are calculated routinely via the EBV/GEBV mixed models. Gains are expressed such that a positive value represents a favorable change and a negative value an unfavorable change. Heritabilities (h2) were calculated as part of the routine EBV calculations and used the models described in Section 3.5.