Tissue contaminants and wild fish health in the St. Clair River Area of Concern - Part 2: Spatial trends and temporal declines in organics
| Autor: | Mark E. McMaster, Derek C. G. Muir, J.P. Sherry, Annette F. Muttray, Gerald R. Tetreault |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Shorthead redhorse 010504 meteorology & atmospheric sciences 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Rivers Environmental Chemistry Animals Notropis Waste Management and Disposal 0105 earth and related environmental sciences Ontario Moxostoma Perch biology Emerald shiner Hexachlorobenzene Pesticide biology.organism_classification Pollution Polychlorinated Biphenyls Hexachlorobutadiene Fishery chemistry Female Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | The Science of the total environment. 746 |
| ISSN: | 1879-1026 |
| Popis: | We explored tissue concentrations of polychlorinated biphenyls (PCBs), chlorinated pesticides, and relevant organochlorines and fish health in the following adult wild fish in the St. Clair River Area of Concern (Ontario, Canada): shorthead redhorse (Moxostoma macrolepidotum), yellow perch (Perca flavescens), and emerald shiner (Notropis atherinoides). We collected adult fish from sites within the river's industrial zone (Stag Island), a downstream site adjacent to Walpole Island (Chenal Ecarte), and an upstream reference site in Lake Huron in 2002/2003 and 2014. We tested for trends in tissue concentrations of organic contaminants across sites and over time; we assessed the potential effects of contaminants on morphological indicators of fish health across sites by year. Over the 12-year period, the tissue concentrations of most PCBs declined at the river sites, except for some non-legacy PCBs (PCB11 and 185), which increased in yellow perch at Stag Island, a new observation for fish in the St. Clair River AOC. There was little difference between the concentrations of calculated toxic equivalents (TEQs) of the Lake Huron and the St. Clair River fish in 2014, except for emerald shiners from Stag Island which had elevated ΣPCB and TEQs. Each fish species at all sites exceeded the Canadian tissue residue guideline for PCBs for the protection of mammalian wildlife consumers of aquatic biota, but fish-derived TEQs indicated little potential health risk to fish. Over time, hexachlorobutadiene and hexachlorobenzene concentrations increased in some fish at Stag Island by about 8- and 4-fold, respectively, whereas they decreased at other sampling locations. Principal Component Analysis followed by Linear Discriminant Analysis of the 2014 SHRH data suggested that although the fish separated by site, tissue concentrations of PCB and organochlorine contaminants did not have consistent relationships to the morphological health indicators, including egg production in females, which implied the absence of causative relationships. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect