Figure 2.

Associative Memories Acquired by Solitarious Locusts Are Not Disrupted by Gregarization

(A) Training and testing protocols used to test the persistence of associative memories throughout gregarization. The three groups of locusts were either appetitively or aversively trained.

(B) Appetitive conditioning caused an increase in the preference for the CS in pretrained transiens locusts similar to that made by solitarious and transiens locusts (G₁ = 0 and G₁ = 0.43, respectively; both p > 0.513; α′ = 0.025). Aversively conditioned pretrained transiens locusts avoid the CS, showing a conditioned response similar to that of solitarious locusts (G₁ = 0.05; p = 0.823; α′ = 0.025) but higher than that of transiens locusts (G₁ = 9.07; p = 0.003; α′ = 0.025). Error bars represent ±SE. ^∗∗p < 0.01; n.s., not significant.