Courtship and spawning behaviour during No Competition experiments over 5 min, average every 2 h over 48 h or until one fish died.

NT = wild-type coho salmon, T = growth hormone transgenic coho salmon, Mesocosm = fish were raised from smolt in a mesocosm, Nature = fish were raised from smolt in natural conditions.
a,bindicates significant differences between pairs when fish are paired with a member of their same group, p<0.05.