Table 1

Descriptive statistics of the food webs (total number) and the δ13C and δ15N values (mean, standard deviation, minimum and maximum) of freshwater fish contained in IsoFresh database for each geographical region.

Region Food webs δ13C (‰) δ15N (‰)


n Mean SD Min Max Mean SD Min Max
Africa 74 ‒21.7 1.8 ‒24.7 ‒18.5 10.1 1.3 8.1 12.0
Asia 108 ‒25.3 1.8 ‒27.8 ‒22.9 11.2 1.4 9.3 13.1
Europe 219 ‒26.5 1.6 ‒28.5 ‒24.6 11.0 1.2 9.5 12.4
North America 291 ‒25.1 1.5 ‒27.2 ‒23.1 10.4 1.3 8.7 12.1
Oceania 178 ‒25.6 1.8 ‒28.0 ‒23.3 9.4 1.0 8.1 10.7
South America 131 ‒26.6 2.1 ‒30.1 ‒23.4 9.9 1.4 7.7 12.1

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