Functional response ratio (FRR) (a/h) of Procambarus clarkii preying on chironomid larvae and Daphnia magna under different substrate treatments; no substrate (green), sand (blue), gravel (brown).

  Part of: South J, McCard M, Khosa D, Mofu L, Madzivanzira TC, Dick JTA, Weyl OLF (2019) The effect of prey identity and substrate type on the functional response of a globally invasive crayfish. NeoBiota 52: 9-24.