Sexual difference in PCB concentrations of lake trout (Salvelinus namaycush) from Lake Ontario
| Autor: | Michael J. Keir, D. Michael Whittle, Charles P. Madenjian, George E. Noguchi |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Male
endocrine system Environmental Engineering Bioenergetics Trout Aquatic organisms chemistry.chemical_compound Animal science Sex Factors Environmental Chemistry Animals Waste Management and Disposal reproductive and urinary physiology Sexual difference Salvelinus Ontario biology Adult female urogenital system Ecology organic chemicals food and beverages Polychlorinated biphenyl Aquatic animal biology.organism_classification Pollution Polychlorinated Biphenyls chemistry Female Water Pollutants Chemical |
| Zdroj: | The Science of the total environment. 408(7) |
| ISSN: | 1879-1026 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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