Figure 2 in Standard weight equations of two sub-/tropic nonnative freshwater fish, Clarias gariepinus and Oreochromis niloticus, in the Sakarya River Basin (NW Turkey)

Figure 2. Distribution of the residuals used to investigate potential length-bias in the standard weight (W ) equation for C. gariepinus (a) and O. niloticus (b) from the s Sakarya River Basin (residuals = standardized residuals of the regression; fitted values = values obtained by the model fit).