Table 2.

Summary of significant response metrics from paired PCA-GAMM models. Results of paired PCA-GAMM models examining the effects of sound playback on multiple behavioural metrics. (All statistical results shown in the table are from analysis of the first eigenvector within each response metric grouping (‘n’ corresponds to the number of dives analysed across all individuals). Each row represents a tested hypothesis rather than a unique model.)

hypothesis	response metric	PCA-GAMM	PCA variance	n	p-value	r2
behaviour changes during sound exposure	dive	before/during/after	0.76	430	0.038	0.14
behaviour changes during sound exposure	orientation	before/during/after	0.39	430	0.019	0.04
behaviour changes during sound exposure	horizontal displacement	before/during/after	0.43	418	<0.005	0.07
effect of sound type (MFA versus PRN)	dive	during	0.76	88	0.033	0.38
effect of behavioural state	dive	before/during/after	0.76	430	0.0374	0.14
effect of behavioural state	dive	during	0.76	88	0.0454	0.38
effect of maximum dive received level	dive	during	0.76	88	<0.005	0.38
effect of minimum dive received level	dive	during	0.76	88	0.0369	0.38