Fig. 3From: Nile tilapia (Oreochromis niloticus) invasion impacts trophic position and resource use of commercially harvested piscivorous fishes in a large subtropical riverPrey fish data of the three piscivorous fishes from the invaded and reference rivers (mean ± SD). a Comparison the number of prey fish species, b comparison of the relative densities (i.e., CPUE, g) of prey fishes caught in each net each dayBack to article page