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

Science of the Total Environment

By:
, , , and
DOI: 10.1016/j.scitotenv.2009.12.024

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Abstract

We determined polychlorinated biphenyl (PCB) concentrations in 61 female lake trout (Salvelinus namaycush) and 71 male lake trout from Lake Ontario (Ontario, Canada and New York, United States). To estimate the expected change in PCB concentration due to spawning, PCB concentrations in gonads and in somatic tissue of lake trout were also determined. In addition, bioenergetics modeling was applied to investigate whether gross growth efficiency (GGE) differed between the sexes. Results showed that, on average, males were 22% higher in PCB concentration than females in Lake Ontario. Results from the PCB determinations of the gonads and somatic tissues revealed that shedding of the gametes led to 3% and 14% increases in PCB concentration for males and females, respectively. Therefore, shedding of the gametes could not explain the higher PCB concentration in male lake trout. According to the bioenergetics modeling results, GGE of males was about 2% higher than adult female GGE, on average. Thus, bioenergetics modeling could not explain the higher PCB concentrations exhibited by the males. Nevertheless, a sexual difference in GGE remained a plausible explanation for the sexual difference in PCB concentrations of the lake trout.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Sexual difference in PCB concentrations of lake trout (Salvelinus namaycush) from Lake Ontario
Series title:
Science of the Total Environment
DOI:
10.1016/j.scitotenv.2009.12.024
Volume
408
Issue:
7
Year Published:
2010
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:
Science of the Total Environment
First page:
1725
Last page:
1730
Other Geospatial:
Lake Ontario