Methylmercury in liver generally predominates when total Hg concentrations are less than ;10 mg kg1 wet weight; however, with greater Hg accumulation, an increasingly high proportion of the total liver Hg is often present as an inorganic species.
Frequently, animals with the highest liver-Hg accumulation have the lowest MeHg fraction, despite being exposed to Hg primarily as MeHg in fish (35, 36).