Seasonal and Regional Variations of Metal Contamination and Condition Indicators in Yellow Perch (Perca flavescens) along Two Polymetallic Gradients. I. Factors Influencing Tissue Metal Concentrations

Autor:	Patrice Couture, Patrick Busby, James W. Rajotte, Charles Gauthier, Gregory Pyle
Rok vydání:	2008
Předmět:	Chronic exposure Perch Metal contamination biology Health Toxicology and Mutagenesis Ecological Modeling Sediment Seasonality biology.organism_classification medicine.disease Pollution Acclimatization Metal visual_art Environmental chemistry medicine visual_art.visual_art_medium Fish
Zdroj:	Human and Ecological Risk Assessment: An International Journal. 14:97-125
ISSN:	1549-7860 1080-7039
DOI:	10.1080/10807030701790330
Popis:	This study examined relationships among water, sediment, diet, and fish tissue metal (Cd, Cu, Ni, Se, and Zn) concentrations in yellow perch from metal gradients in two regions (Sudbury (S), Ontario, and Rouyn-Noranda (RN), Quebec, Canada) intwoseasons(springandsummer).Theobjectivesofthisstudywere(1)toexamine theinfluencesofaqueousanddietarymetalcontaminationonyellowperchliverand kidney metal accumulation; (2) to compare the seasonal and regional variations in gut content and tissue metal concentrations along the two gradients studied; and (3) to investigate the potential of metals for tissue accumulation under conditions of life-long chronic exposure. Our results suggest a greater aqueous than dietary influence on tissue metal concentrations for all metals examined except Cd, where the opposite was observed. Metals did not accumulate in older fish, except for Cd that accumulated with age in RN, but not S, fish. Regional, but also metal-specific differences in metal handling capacities are proposed. Fish from neither region appeared capable of regulating tissue Cd concentrations, but fish from both regions regulated Zn tightly. Sudbury fish appeared better at regulating tissue Cu, Ni, and perhaps also Se concentrations than RN fish, suggesting acclimation or selection for metal tolerance. There were several significant seasonal effects on tissue metal concentrations. However, close examination of the dataset does not allow proposing the presence of a season-linked mechanism explaining these variations, precluding
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ef786ed29f5b699b41bff5c7864e3e0 https://doi.org/10.1080/10807030701790330 Zobrazit plný text záznamu