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Spatial trends and temporal declines in tissue metals/metalloids in the context of wild fish health at the St. Clair River Area of Concern
- Source :
- Journal of Great Lakes Research. 47:900-915
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The St. Clair River, which flows from Lake Huron to Lake St Clair, receives discharges and emissions from numerous petroleum refineries, petrochemical facilities, and other sources. We used a multi-factor ANOVA to test for spatial and temporal changes in concentrations of trace metals/metalloids in homogenates of fish from Lake Huron (reference site) and two river sites - an industrialized region (Stag Island) and downstream Walpole Island/Chenal Ecarte. In 2002/2003 and in 2014, we sampled 20 adult fish of each sex of the following species: shorthead redhorse (Moxostoma macrolepidotum), yellow perch (Perca flavescens); we added emerald shiner (Notropis atherinoides; unsexed) in 2014. There was a temporal decline of most metals/metalloids in shorthead redhorse at the river sites. Linear Discriminant Analysis separated the 2014 shorthead redhorse by site. Emerald shiners had higher concentrations of metals/metalloids, apart from mercury, than the other species; those concentrations were highest at Chenal Ecarte, which warrants further research. Tissue concentrations of mercury, which declined temporally at Stag Island and Walpole Island, were above the protective guidance for wildlife consumers at all sites, but were lower than predicted to affect fish health. Apart from increased liver size (ANCOVA) in shorthead redhorse at Walpole Island (2014), the health variables in the riverine fish were stable or differed slightly from reference, which indicated good health and reproductive potential. In shorthead redhorse, tissue metals correlated inconsistently with health indices. Further research could ascertain if temporal declines in metals/metalloids in riverine SHRH are benefits of remediation actions or fluctuations with other causes.
- Subjects :
- 0106 biological sciences
Perch
Moxostoma
Shorthead redhorse
Ecology
biology
Emerald shiner
010604 marine biology & hydrobiology
Wildlife
chemistry.chemical_element
Context (language use)
010501 environmental sciences
Aquatic Science
biology.organism_classification
01 natural sciences
Mercury (element)
Fishery
chemistry
Environmental science
Notropis
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 03801330
- Volume :
- 47
- Database :
- OpenAIRE
- Journal :
- Journal of Great Lakes Research
- Accession number :
- edsair.doi...........63078a177de2f912e676b123e5317fe4