Seasonal and regional variations in metal contamination and condition indicators in yellow perch (Perca flavescens) along two polymetallic gradients. III. Energetic and physiological indicators

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dc.contributor.authorCouture, Patrice
dc.contributor.authorRajotte, James W.
dc.contributor.authorPyle, Gregory
dc.date.accessioned2014-06-06T01:56:00Z
dc.date.available2014-06-06T01:56:00Z
dc.date.issued2008
dc.descriptionSherpa Romeo green journalen_US
dc.description.abstractThe influences of metal contamination, fish size, season, and region on tissue metabolic capacities and protein concentrations were examined in yellow perch from two metal gradients (Sudbury, Ontario, and Rouyn-Noranda, Qu´ebec, Canada) in two seasons (spring and summer). In general, increased tissue Cu and Cd contamination was associated with lower aerobic capacities, suggesting direct metal inhibition of aerobic enzymes. However, our data also revealed that tissue Ni contamination positively affected aerobic capacities, possibly due to oxidative damage to mitochondrial membranes leading to compensatory increases in the activity of mitochondrial enzymes. Tissue aerobic capacities decreased, but anaerobic capacities increased, with size. Tissue protein concentrations and metabolic capacities were also influenced by season. A novel finding of this study is that size-corrected tissue enzyme activities can differ markedly in yellow perch sampled in the same season in similar lakes, but separated by a few hundred kilometers. Overall, the results from this large dataset support that tissue metabolic capacities are under seasonal and regional influences, but are also affected by metal contamination. Our study indicates that tissue metabolic enzyme activities should be considered as a tool for ecological risk assessment studies aiming at detecting metal stress in wild fish. However, fish should be sampled over a short period, and reference sites should be close to contaminated sitesen_US
dc.description.peer-reviewYesen_US
dc.identifier.citationCouture, P., J. Rajotte, and G. Pyle. 2008. Seasonal and regional variations in metal contamination and condition indicators in yellow perch (Perca flavescens) along two polymetallic gradients. III. Physiological indicators. Human and Ecological Risk Assessment, 14: 146-165en_US
dc.identifier.urihttps://hdl.handle.net/10133/3445
dc.language.isoen_CAen_US
dc.publisherTaylor & Francisen_US
dc.publisher.departmentDepartment of Biologyen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionInstitut National de la Recherche Scientifiqueen_US
dc.publisher.institutionLaurentian Universityen_US
dc.publisher.institutionNipissing Universityen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.subjectYellow perchen_US
dc.subjectMetalsen_US
dc.subjectMetabolic capacitiesen_US
dc.subjectMetabolic scalingen_US
dc.subjectSeasonalityen_US
dc.subjectRegional variationsen_US
dc.titleSeasonal and regional variations in metal contamination and condition indicators in yellow perch (Perca flavescens) along two polymetallic gradients. III. Energetic and physiological indicatorsen_US
dc.typeArticleen_US
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