Table 1.

Key statistical parameters of non-metric multidimensional scaling (nMDS) of arcsine-square-root-transformed PUFA (% of total FAME) of basal resources, benthic invertebrates and (a) salmonids (S. trutta and O. mykiss) and (b) European Bullhead (C. gobio)

	FA	nMDS scores		r	P
		Axis 1	Axis 2
Salmonids	EPA	− 0.05161	0.99867	0.50	< 0.001
	ARA	0.5554	0.83159	0.54	< 0.001
	DHA	0.5837	0.81197	0.85	< 0.001
	LA	− 0.60997	− 0.79243	0.85	< 0.001
	ALA	− 0.55755	− 0.83014	0.89	< 0.001
	SDA	− 0.87338	0.48704	0.95	< 0.001
European bullhead	EPA	0.97165	0.23644	0.66	< 0.001
	ARA	0.5331	0.84605	0.78	< 0.001
	DHA	0.61576	0.78794	0.79	< 0.001
	LA	− 0.66207	− 0.74944	0.83	< 0.001
	ALA	− 0.66585	− 0.74608	0.91	< 0.001
	SDA	0.64262	− 0.76619	0.93	< 0.001

Vectors (fatty acids, FA) are sorted ascending according to its correlation coefficient (r). ALA alpha-linolenic acid, SDA stearidonic acid, EPA eicosapentaenoic acid, DHA docosahexaenoic acid, LA linoleic acid, ARA arachidonic acid