Fig. 4From: Honey bee (Apis mellifera ligustica) acetylcholinesterase enzyme activity and aversive conditioning following aluminum trichloride exposureResults of the learner trial bees for the two colors offered. The dotted line for each figure is the 0-baseline values as determined in Eq. 1. The trend change that appears at 300 s was not the result of any experimental modification and time effects were non-significant. a: Mean percent time on the blue half of the shuttlebox when yellow was safe (non-shock). b: Mean percent time on the blue half of the shuttlebox when blue was safe (non-shock)Back to article page