Table 1.

The sire and dam effects contributing to cardiac performance and thermal tolerance in Big Qualicum River chinook salmon (Oncorhynchus tshawytscha). The results of the two-way ANOVA are summarized for resting heart rate (f_H), highest f_H (f_Hpeak), scope for f_H, Arrhenius break temperature (T_AB), arrhythmic temperature (T_arr), thermal window (T_win) and critical thermal maximum (CT_max). Shown are the variance components of each source (σ²), as well as the contributions to phenotypic variance (% phenotypic var) of maternal, additive genetic, and non-additive genetic effects. Significant values (p < 0.05) are italicized.

	d.f.	SS	F	p	σ2	% phenotypic var
resting fH
dam	4	3.2 × 1011	12.9	<0.001	1.8 × 109	maternal	0
sire	4	4.5 × 1011	18.7	<0.001	2.4 × 109	additive	53
sire × dam	16	9.4 × 1010	0.39	0.983	0.0	non-additive	0
residual	170				1.4 × 1010
fHpeak
dam	4	1.2 × 1011	2.17	0.118	4.0 × 108	maternal	10
sire	4	2.2 × 1010	0.39	0.812	0.0	additive	0
sire × dam	16	2.3 × 1011	0.88	0.594	0.0	non-additive	0
residual	169				1.6 × 1010
scope for fH
dam	4	1.5 × 106	3.13	0.044	6.7 × 103	maternal	22
sire	4	4.5 × 105	0.93	0.470	0.0	additive	0
sire × dam	16	2.0 × 106	1.06	0.395	0.0	non-additive	0
residual	169				1.2 × 105
TAB
dam	4	425.2	0.25	0.909	0.0	maternal	0
sire	4	4064.0	2.34	0.099	14.39	additive	18
sire × dam	16	6969.2	1.44	0.129	5.54	non-additive	7
residual	171				304.9
Tarr
dam	4	4.1 × 1010	4.32	0.013	2.2 × 108	maternal	29
sire	4	1.2 × 1010	1.40	0.311	2.1 × 107	additive	3
sire × dam	16	3.7 × 1010	0.93	0.540	0.0	non-additive	0
residual	168				2.5 × 109
Twin
dam	4	468.9	6.28	0.003	2.69	maternal	39
sire	4	132.9	1.79	0.179	0.333	additive	5
sire × dam	16	296.8	0.85	0.625	0.0	non-additive	0
residual	168				21.49
CTmax
dam	4	2.6 × 1077	9.79	<0.001	2.0 × 1075	maternal	77
sire	4	4.4 × 1076	1.65	0.203	0.0	additive	0
sire × dam	16	1.0 × 1077	0.60	0.880	0.0	non-additive	0
residual	148				1.0 × 1076