Bottlenose Dolphins and Algal Toxins in Sarasota Bay
Author Information
Author(s): Michael J. Twiner, Spencer Fire, Lori Schwacke, Leigh Davidson, Zhihong Wang, Steve Morton, Stephen Roth, Brian Balmer, Teresa K. Rowles, Randall S. Wells
Primary Institution: Marine Biotoxins Program, National Oceanic and Atmospheric Administration/National Ocean Service, Charleston, South Carolina, United States of America
Hypothesis
What is the extent of exposure of bottlenose dolphins to multiple algal toxins in Sarasota Bay?
Conclusion
Bottlenose dolphins in Sarasota Bay are frequently exposed to both brevetoxin and domoic acid, which may have long-term health impacts.
Supporting Evidence
- 36% of dolphins tested positive for brevetoxin.
- 53% of dolphins tested positive for domoic acid.
- DA concentrations in feces correlated with increased white blood cell counts.
- First report of domoic acid in southwestern Florida marine mammals.
- Concurrent exposure to both toxins was observed in 14% of dolphins.
Takeaway
Bottlenose dolphins in Sarasota Bay often get sick from eating fish that have toxins from harmful algae.
Methodology
Dolphin tissue and environmental samples were collected over a ten-year period, and toxin concentrations were analyzed using various biochemical methods.
Potential Biases
Potential biases in sampling methods and environmental conditions during assessments.
Limitations
The study may not account for all environmental factors influencing toxin exposure and health effects.
Participant Demographics
Bottlenose dolphins (Tursiops truncatus) from Sarasota Bay, Florida.
Statistical Information
P-Value
p=0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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