2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 3:15 PM - 3:30 PM | COMPARISON OF ENZYMATIC THERMAL TOLERANCE AMONG RARE AND COMMON MUSSEL SPECIES OF CENTRAL TEXAS | 410 A
COMPARISON OF ENZYMATIC THERMAL TOLERANCE AMONG RARE AND COMMON MUSSEL SPECIES OF CENTRAL TEXAS
Climate change is expected to drive warming temperatures in many southern states. We hypothesized that ESA candidate mussel species in Texas may be more susceptible to thermal stress, due to reduced intraspecific diversity and range, than common species. We used the electron transport system (ETS) assay to examine intra and interspecific patterns in thermal performance of respiratory enzymes of four rare species (Cyclonaias petrina, C. houstonensis, Lampsilis bracteata, and Fusconaia mitchelli) and two widespread species (Amblema plicata and Lampsilis teres). Preliminary analysis revealed significant differences in enzymatic thermal tolerance and intraspecific variation among the six species tested. Optimal temperatures and hypothesized temperature-of-chaperone-activation were highest for two of the rare species (C. petrina and C. houstonensis), intermediate for A. plicata, and lowest for L. teres. Similar results were found for intraspecific variation in enzymatic thermal tolerance. Regulatory and management strategies to reduce thermal stress should be tailored to individual species of interest, due to significant variation in thermal tolerance among species. However, it does not appear to be the case that rare species are necessarily more susceptible to thermal stress than common species.
- Conservation
- Climate Change
- Metabolism
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Presenters/Authors
Jim Stoeckel
(), Auburn University, jas0018@auburn.edu;
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Austin Haney
(), Auburn University, arh0093@auburn.edu;
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Hisham Abdelrahman
(), School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, hisham@auburn.edu;
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Brian Helms
(), Troy University, helmsb@troy.edu;
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