In total, the northern hemisphere’s roughly 230,000 northern elephant seals could be redistributing 10–12 kg of mercury from the open ocean to water near their 21 coastal rookeries in the US and Mexico, the researchers calculated.
The methylmercury could re-enter the food chain when the moulted hair decomposes or is ingested by filter-feeding and particulate-feeding invertebrates and planktivorous fish.
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