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Thesis
Swim Performance Variability of Three Species of Juvenile Elasmobranchs and Its Relationship to Predator Avoidance
University of West Florida Libraries
Master of Science (MS), University of West Florida
2007
Abstract
Maximum swimming velocity, oxygen consumption, and plasma lactate levels are useful indicators for evaluating metabolic performance limits in fish. Metabolic costs of exertion, maximum swim velocities, and ventilation rates in juvenile blue-spotted ribbontail stingrays (Taeniura lymma), Atlantic stingrays (Dasyatis sabina), and white-spotted bamboo sharks (Chiloscyllium plagiosum) were quantified. All species showed a decrease in oxygen consumption postexertion, with Atlantic stingrays being significantly lower (Independent t-test; P=0.0425). Significantly higher values in plasma lactate were evident in bamboo sharks pre and postexertion (0.02 and 0.35 mmol l-1, respectively); however, values for Atlantic stingrays remained unchanged (0.91 and 0.64 mmol l-1). Atlantic and ribbontail stingrays obtained greater relative speeds (9.224 and 5.163 BL sec-1, respectively) than bamboo sharks (1.060 BL sec-1). In addition, preexertion ventilation rates in Atlantic and ribbontail stingrays were faster than bamboo sharks (71.18, 70.67, 46.75 breaths min-1, respectively), while only Atlantic stingray ventilation rates postexertion differed from either bamboo sharks or ribbontail stingrays (77.69, 62.69, 49.40 breaths min-1, respectively). These data suggest that all three species utilized aerobic metabolism in conjunction with behavioral adaptations as predator avoidance strategies, making minimal use of anaerobic metabolism for locomotion.
Details
- Title
- Swim Performance Variability of Three Species of Juvenile Elasmobranchs and Its Relationship to Predator Avoidance
- Resource Type
- Thesis
- Contributors
- Wayne A Bennett (Committee Chair) - University of West Florida, BiologyDavid J. Smith (Committee Member)Phillip E Ryals (Committee Member)
- Publisher
- University of West Florida Libraries
- Format
- pdf
- Number of pages
- 31
- Copyright
- Permission granted to the University of West Florida Libraries to digitize and/or display this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires the permission of the copyright holder.
- Identifiers
- 99380090719306600
- 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