The fractionation factors (Δδ15N) estimated using stomach contents analysis of predatory freshwater fish species from the Upper Zambezi, Kavango and Kwando rivers.

Nstomachs are the number of stomachs which contained identified prey items used for this analysis, and δ15N the isotopic values used for the analyses. The average and standard deviation of Δδ15N has been calculated from the Δδ15N per species by river as detailed in the table.