Aguiar [41] found, for Amazon, ash content of 1.0% to Schizodon sp and Prochilodus nigricans, 1.2% for Curimata sp, all within the levels now presented, and from 1.8% to Plagioscion sp, which is consistent with the high ash content found in this study for the species G. surinamensis but much higher than that found for P. squamosissimus and also the Plagioscion genre.