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Thesis
THERMAL ACCLIMATION DYNAMICS OF THE ATLANTIC STINGRAY, DASYATIS SABINA
University of West Florida
Master of Science (MS), University of West Florida
2016
Abstract
Thermal acclimation responses of Atlantic stingrays, Dasyatis sabina, were determined by reciprocal transfer of fish between 18 and 24°C or 24 and 30°C. The acclimation response ratio of fully acclimated fish showed that Atlantic stingrays gain or lose approximately 0.5°C of their thermal tolerance for every degree increase or decrease in acclimation temperature, respectively. Predictive models of thermal tolerance change over time (measured as Critical Thermal Maxima) suggest that stingrays are 75% acclimated by 9.5 days regardless of temperature transfer or direction of temperature change. The largest acclimation changes were seen during initial transfers indicating an asymmetrical tolerance pattern, whereby stingrays gained or lost approximately twice the heat tolerance at lower transfer temperatures (18.24°C) compared to the higher transfer treatments (24-30°C). This novel pattern of asymmetric heat tolerance acquisition may be a key adaptation necessary for surviving rapid and extreme water temperature changes Atlantic stingrays commonly experience in their natural environment.
Details
- Title
- THERMAL ACCLIMATION DYNAMICS OF THE ATLANTIC STINGRAY, DASYATIS SABINA
- Resource Type
- Thesis
- Publisher
- University of West Florida
- Format
- text
- Identifiers
- 99380090847906600
- Academic Unit
- Biology
- Language
- English
- Awarding Institution
- University of West Florida; Master of Science (MS)
- Theses and Dissertations
- Master of Science (MS), University of West Florida