Sexual difference in mercury concentrations of lake trout (Salvelinus namaycush) from Lake Ontario

Chemosphere
By: , and 

Links

Abstract

We determined total mercury (Hg) concentrations in 50 female lake trout (Salvelinus namaycush) and 69 male lake trout from Lake Ontario (Ontario, Canada and New York, United States). Results showed that, on average, males were 8% higher in Hg concentration than females in Lake Ontario. We also used bioenergetics modeling to determine whether a sexual difference in gross growth efficiency (GGE) could explain the observed sexual difference in Hg concentrations. According to the bioenergetics modeling results, male GGE was about 3% higher than female GGE, on average. Although the bioenergetics modeling could not explain the higher Hg concentrations exhibited by the males, a sexual difference in GGE remained a plausible explanation for the sexual difference in Hg concentrations of the lake trout. In an earlier study, male lake trout from Lake Ontario were found to be 22% higher in polychlorinated biphenyl (PCB) concentration than females from Lake Ontario. Thus, although males were higher in both Hg and PCB concentrations, the degree of the sexual difference in concentration varied between the two contaminants. Further research on sexual differences in Hg excretion rates and Hg direct uptake rates may be needed to resolve the disparity in results between the two contaminants.

Study Area

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Sexual difference in mercury concentrations of lake trout (Salvelinus namaycush) from Lake Ontario
Series title Chemosphere
DOI 10.1016/j.chemosphere.2011.02.053
Volume 83
Issue 7
Year Published 2011
Language English
Publisher Elsevier
Publisher location Amsterdam, Netherlands
Contributing office(s) Great Lakes Science Center
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Chemosphere
First page 903
Last page 908
Other Geospatial Lake Ontario
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table