Long-term feeding ecology and habitat use in harbour porpoises Phocoena phocoena from Scandinavian waters inferred from trace elements and stable isotopes

Table 2 Trace element concentrations (μg·g^-1 dw) assayed in liver (for Zn, Cu, Fe, Se, Hg) and kidney (for Cd) of harbour porpoises from Scandinavian waters.

	Region	n	Mean ± SD	Range	ANOVA/ANCOVA(*)
Zn	southern	13	118 ± 48	75 – 261	F_{3, 28}: 2.6	p = 0.071	a
	southwest	9	103 ± 22	69 – 140			a
	Nordland	7	94 ± 8	86 – 109			a
	Finnmark	3	74 ± 2	74 – 76			a
Cu	southern	13	23.8 ± 4.7	15.4 – 33.2	F_{3, 28}: 2.4	p = 0.089	a
	southwest	9	26.3 ± 7.1	17.2 – 39.1			a
	Nordland	7	25.5 ± 4.6	19.7 – 34.1			a
	Finnmark	3	17.7 ± 5.4	12.1 – 22.9			a
Fe	southern	13	1330 ± 480	860 – 2590	F_{3, 28}: 0.5	p = 0.665	a
	southwest	9	1230 ± 310	810 – 1770			a
	Nordland	7	1100 ± 240	790 – 1440			a
	Finnmark	3	1220 ± 260	980–1500			a
Se*	southern	12	9.8 ± 7.3	4.3 – 31.6	F_{3, 27}: 4.6	p = 0.010	a
	southwest	9	17.7 ± 8.0	6.1 – 33.5			b
	Nordland	7	14.8 ± 5.7	5.9 – 24.9			b
	Finnmark	3	6.7 ± 0.9	5.8 – 7.5			a
Hg*	southern	11	10.3 ± 10.9	4.1 – 42.8	F_{3, 26}: 20.1	p < 0.001	a
	southwest	9	19.7 ± 9.8	6.1 – 31.6			a
	Nordland	7	15.5 ± 8.3	3.8 – 26.5			a
	Finnmark	3	0.8 ± 0.1	0.6 – 0.9			b
Cd*	southern	12	1.0 ± 0.8	0.1 – 2.3	F_{3, 26}: 19.6	p < 0.001	a
	southwest	8	5.6 ± 2.5	2.7 – 10.4			b
	Nordland	7	9.2 ± 5.2	3.6 – 15.9			c
	Finnmark	3	5.7 ± 2.2	3.4 – 7.6			bc

Geographic differences among groups are indicated: areas followed by the same letter are not significantly different. n = number of samples.

ISSN: 1472-6785