Sexual difference in PCB concentrations of walleyes (Sander vitreus) from a pristine lake
| Autor: | Linda J. Begnoche, Patrick A. Hanchin, Sergei M. Chernyak, Charles P. Madenjian |
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| Rok vydání: | 2009 |
| Předmět: |
Male
Environmental Engineering Adult male Bioenergetics Fresh Water Biology chemistry.chemical_compound Animal science Sex Factors Environmental Chemistry Animals Body Size Gonads Waste Management and Disposal reproductive and urinary physiology Sexual difference Persistent organic pollutant Adult female Ecology Temperature food and beverages Polychlorinated biphenyl Aquatic animal Pollution Polychlorinated Biphenyls Perciformes chemistry Fish Female Energy Metabolism |
| Zdroj: | The Science of the total environment. 407(15) |
| ISSN: | 1879-1026 |
| Popis: | We determined polychlorinated biphenyl (PCB) concentrations in 15 adult female walleyes (Sander vitreus) and 15 adult male walleyes from South Manistique Lake (Michigan, United States), a relatively pristine lake with no point source inputs of PCBs. By measuring PCB concentration in gonads and in somatic tissue of the South Manistique Lake fish, we also estimated the expected change in PCB concentration due to spawning for both sexes. To determine whether gross growth efficiency differed between the sexes, we applied bioenergetics modeling. Results showed that, on average, adult males were 34% higher in PCB concentration than adult females in South Manistique Lake. Results from the PCB determinations of the gonads and somatic tissues revealed that shedding of the gametes led to 1% and 5% increases in PCB concentration for males and females, respectively. Therefore, shedding of the gametes could not explain the higher PCB concentration in adult male walleyes. Bioenergetics modeling results indicated that the sexual difference in PCB concentrations of South Manistique Lake walleyes was attributable, at least in part, to a sexual difference in gross growth efficiency (GGE). Adult female GGE was estimated to be up to 17% greater than adult male GGE. |
| Databáze: | OpenAIRE |
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