Table 1. Stable isotope values (δ¹⁵N, δ³⁴S, δ¹³C) (‰) for grizzly bears sampled in Cooke City Basin, Montana, 2007–2009.

ID	Sex	Year	δ13C	δ15N	δ34S
071	F	2008	-21.5	5.1	2.8
073	F	2007	-21.5	1.5	5.0
073	F	2008	-22.7	1.5	3.8
073	F	2009	-23.6	1.4	2.3
081	F	2009	-23.1	2.3	4.1
086	F	2008	-22.8	3.8	3.3
089	F	2009	-23.1	2.5	3.5
092	F	2008	-22.3	2.8	4.4
106	F	2007	-22.0	2.4	5.4
108	F	2007	-22.3	4.5	5.1
108	F	2009	-22.5	3.9	3.4
09–151	F	2009	-23.0	3.6	3.2
09–290	F	2009	-23.1	3.8	3.4
Mean—Female			-22.6	3.0	3.8
1 SD			0.6	1.2	0.9
09–164	M	2009	-23.3	2.1	3.4
09–228	M	2009	-23.5	3.4	0.0
09–474	M	2009	-22.7	4.3	2.7
116277	M	2009	-22.5	2.3	2.8
Mean—Male			-23.0	3.0	2.2
1 SD			0.5	1.0	1.5
Mean–All			-22.7	3.1	3.5
1 SD			0.6	1.1	1.3
		2007
Mean			-21.9	2.8	5.2
1 SD			0.4	1.5	0.2
		2008
Mean			-22.3	3.3	3.6
1 SD			0.6	1.5	0.7
		2009
Mean			-23.0	3.0	2.9
1 SD			0.4	1.0	1.1
Between male and females:
δ13C: t = 1.424, df = 6.749, P = 0.199
δ15N: t = -0.028, df = 5.815, P = 0.978
δ34S: t = 1.997, df = 3.725, P = 0.122
Among years:
δ13C: F(1,15) = 18.54, df = 1, P<0.005 (ANOVA)
δ15N: F(1,15) = 0.001, df = 11, P = 0.975 (ANOVA)
δ34S: H = 7.82, df = 2, P = 0.02 (Kruskal–Wallis)