. 2019 May 16;7(1):coz020. doi: 10.1093/conphys/coz020

Table 4.

Linear mixed effect model results for temperature detrended cod (n = 8) and saithe (n = 2) heart rate, swimming depth, body acceleration and distance from the centre of the sea cage (origo). Correlations are given between sound measurements and the measured covariates for cod only due to sample size limitations. Separate models were tested for each sound measurement

Response variable (residuals)	Model type	Delta AICc_null	Covariate name	Coefficient	SE	P
COD
1) Heart rate	All covariates	2408	Swimming depth	0.230	0.100	0.022
			Distance to origo	−0.008	0.042	0.85
			Day	−1.600	0.920	0.094
			Swimming depth:day	−0.031	0.074	0.67
			Distance to origo:day	0.070	0.033	0.035
	Behavioural factors excluded	1926	AEL_sp	−0.034	0.034	0.32
			AEL_cum	0.043	0.028	0.13
			Day	1.900	0.570	0.001
			AEL_sp:day	0.005	0.015	0.76
			AEL_cum:day	−0.034	0.013	<0.01
2) Swimming depth	All covariates	1710	Distance to origo	−0.270	0.014	<0.001
			Heart rate	0.065	0.020	<0.01
			Day	−0.099	0.260	0.70
			Distance to origo:day	0.013	0.016	0.43
			Heart rate:day	−0.014	0.016	0.38
	Behavioural factors excluded	1725	SEL_cum	0.000	0.044	0.99
			SEL_sp	0.013	0.032	0.69
			Day	−0.180	0.730	0.80
			SEL_cum:day	0.015	0.210	0.50
			SEL_sp:day	−0.014	0.015	0.36
3) Body acceleration	All covariates		No good models and all covariates were P > 0.05
	Behavioural factors excluded		No good models and all covariates were P > 0.05
4) Distance from origo	All covariates	1273	Swimming depth	−2.200	0.300	<0.001
			SEL_cum	0.130	0.020	<0.001
			Heart rate	−0.270	0.120	0.020
			Day	4.900	1.800	<0.01
			Swimming depth:day	0.420	0.140	<0.01
			SEL_cum:day	−0.059	0.013	<0.001
			Heart rate:day	0.069	0.061	0.26
	Behavioural factors excluded	1819	Zero to peak sound pressure level (P_0-pk)	−0.610	0.110	<0.001
			SEL_cum	0.590	0.110	<0.001
			Day	−0.490	−2.000	0.80
			Zero to peak sound pressure level (P_0-pk):day	0.270	0.060	<0.001
			SEL_cum:day	−0.260	0.060	<0.001
SAITHE
1) Heart rate	Behavioural factors excluded	1209	Zero to peak acceleration level (A_0-pk)	−0.056	0.130	0.68
			AEL_sp	0.065	0.170	0.70
			Day	0.470	1.700	0.79
			Zero to peak acceleration level (A_0-pk):day	−0.003	0.066	0.97
			AEL_sp:day	0.002	0.077	0.98