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Mercury Transfer from Bed Sediments to Freshwater Fish (Guppies)¹

ABSTRACT

Mercury transfer from river sediments to freshwater fish (Lebistes reticulata) (wet weight, 29 to 869 mg) was observed for 150 days.

Release rate from the sediment indicates a half-life of 12 to 20 years. The amount taken up by the fish varied widely (up to 600% differences), but half-lives for clearance were all between 38 and 75 days. No correlation was found between mercury uptake rate and either size or sex of fish.

Key Words: water pollution • mercury desorption • mercury uptake

¹ This paper reports research carried out as part of the Ottawa River Project, a joint study by the Nat. Res. Counc. of Can. Lab., Ottawa, Canada K1A 0R6 and the Univ. of Ottawa. Published on NRCC No. 15301.

² Research Officer, Div. of Biol. Sci., Nat. Res. Counc. of Can. Lab. and Visiting Professor, Univ. of Ottawa.

Received for publication January 12, 1976.