2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2018 | 3:00 PM - 3:15 PM | EFFECTS OF SUSPENDED SOLIDS AND SALINITY ON VALVE CLOSURE OF TWO RARE MUSSEL SPECIES FROM CENTRAL TEXAS. | 410 A
EFFECTS OF SUSPENDED SOLIDS AND SALINITY ON VALVE CLOSURE OF TWO RARE MUSSEL SPECIES FROM CENTRAL TEXAS.
Valve closure by mussels in response to stressors has the potential to affect feeding and respiration. We used valvometry to determine whether valve closure was induced by increases in suspended solids or salinity for two candidate mussel species– Cyclonaias petrina and C. houstonensis– endemic to Texas. Mussels were placed in a MosselMonitor and valve movements recorded every 10 seconds for five days. Days 1-3 served as an acclimation period, day 4 served as a control (no sediment or salt added) and day 5 served as the experimental period. During the experimental period, either sediment or salt was added at a constant rate to generate a 6 - 11 hour ramping period during which suspended solids reached a maximum concentration of ~250 mg/L (~70 NTU), or salinity reached a maximum of 4 ppt. We observed markedly different effects between stressors. Mean valve opening decreased only slightly even at excessively high concentrations of suspended solids, but valves closed almost completely in response to increasing salinity. In natural populations, increasing salinity is more likely to negatively affect feeding and respiration via valve-closure than rapid increases in turbidity.
- Salinity
- Sediment
- Conservation
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Presenters/Authors
Ryan Fluharty
(), Auburn University, rsf0015@auburn.edu;
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James Stoeckel
(), Auburn University, jimstoeckel@auburn.edu;
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