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Fig. 7. Thermal preference in N2 (grey bars) and CB4856 (black bars) is not
influenced by food quality. Control (C): thermal gels seeded with E.
coli strain OP50 were incubated at room temperature overnight.
Ultra-violet (UV): prepared as for control then subjected to UV radiation to
kill the bacteria. Heat (H): bacteria grown in liquid culture overnight,
killed via exposure to high temperature, concentrated, and applied to
thermal gels to approximate a live lawn. Mean thermal preferences are based on
3–8 replicates with an average of 144 individuals per replicate for a
total of 3446 observations. Values are least square means ± 2 s.e.m.
Treatments not sharing the same letter are significantly different
(P<0.05; Tukey HSD).
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