2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2018 | 2:30 PM - 2:45 PM | NON-LETHAL TECHNIQUES TO EVALUATE UNIONID HEALTH WITH APPLICATION FOR ASSESSING THE IMPACT OF CONTAMINANTS: MAUMEE RIVER BASIN, OHIO, USA | 410 A
NON-LETHAL TECHNIQUES TO EVALUATE UNIONID HEALTH WITH APPLICATION FOR ASSESSING THE IMPACT OF CONTAMINANTS: MAUMEE RIVER BASIN, OHIO, USA
Unionids are imperiled freshwater taxa that provide ecosystem services associated with water quality. We calculated the condition index (CI) and estimated age via external annuli of Lampsilis siliquoidea and Elliptio dilatata, residing in three tributaries (Blanchard River (BL), Beaver Creek (BE), and Swan Creek (SC)) of the Maumee River, OH. Our results established a positive correlation between non-lethal estimates and lethal sampling with regards to CI and age. We found unionids had greater CIs and were generally older in BL dominated by agriculture, than in SC with suburban influence. Female and male unionid age was similar, however, females were older than average in BL and males were younger than average in SC. Our preliminary data suggests unionid health may be impacted differently by exposure to chemical groups associated with either agricultural or urban use, warranting further research. This research shows the utility of using CI and enumeration of external annuli, as non-lethal methods to calculate relative health and estimate the age of unionid populations. Further, we demonstrate that these tools can be used to help assess if contaminants are impacting the health of unionids in this and other watersheds.
- Invertebrate
- Impairment
- Water Quality
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Presenters/Authors
Nicole Dennis
(), Central Michigan University, denni3n@cmich.edu;
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Mandy Annis
(), US Fish & Wildlife Service, Michigan Ecological Services Field Office, mandy_annis@fws.gov;
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Daelyn A. Woolnough
(), Central Michigan University, wooln1d@cmich.edu;
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