Table 1.

Results of model selection analyses for the mesocosm experiments. Italic indicates best model; parentheses denote random effects and solid denotes nested effects. ΔAICc is the difference between the AICc of a particular model compared with the lowest AICc observed. Models with ΔAICc scores of less than 2.0 have significant explanatory power. The Akaike weight is calculated as the model likelihood normalized by the sum of all model likelihoods; values close to 1.0 indicate greater confidence in the selection of a model.

model	df	ΔAICc	weight
predator acoustic cue experiment
all data
proportion clams consumed ∼ 1 + (trial) + (tank/exposure day)	4	62.8	<0.001
proportion clams consumed ∼ acoustic treatment + (trial) + (tank/exposure day)	8	0	1.0
first exposure day per trial only
proportion clams consumed ∼ 1 + (trial) + (tank)	3	46.7	<0.001
proportion clams consumed ∼ acoustic treatment + (trial) + (tank)	7	0	1.0
predator acoustic cue versus chemical cue experiment
proportion clams consumed ∼ 1 + (trial) + (tank)	3	1.9	0.153
proportion clams consumed ∼ acoustic cue + (trial) + (tank)	4	0	0.403
proportion clams consumed ∼ chemical cue + (trial) + (tank)	4	3.3	0.076
proportion clams consumed ∼ acoustic cue + chemical cue + (trial) + (tank)	5	1.5	0.190
proportion clams consumed ∼ acoustic cue × chemical cue + (trial) + (tank)	6	1.6	0.178