Table 2.

Models used in analyses to test for behavioural effects of underwater electric and petrol engine vessel noise on pilot whales. Models used were linear models (LM) and generalised liner models (GLM). ^aFitted for both mother and calf. The scenario was control, electric engine, and petrol engine vessel passes. Presence and absence (pres/abs) of behavioural events outlined in Table 1.

Response variable	Explanatory variables explored	Type	Error distribution	Link function
Proportion of time restinga	Scenario, group size	GLM	Quasibinomial	Logit
Proportion of time nursing for calf	Scenario, group size	GLM	Quasibinomial	Logit
Proportion of time diving for mother	Scenario, group size	GLM	Quasibinomial	Logit
Pres/abs behavioural events	Scenario, group size	GLM	Binomial	Logit
Respiration ratea	Scenario, group size, pres/abs behavioural events	LM	Gaussian	Identity