Without discussing possible mechanisms it is evident that HM accumulates from the water into the tissues of ecologically different fish species (roach and Gibel carp refer to freshwater
limnophilous benthophagous species, stone loach--freshwater rheophylous benthophagous, perch--freshwater
limnophilous euryphagous and rainbow trout--anadromous rheophylous-limnophilous euryphagous) quantitatively diversely and specifically.