Acoustic Characterization of the Ca�o Island Biological Reserve: Assessing Biological and Anthropogenic Drivers
Legg, Fiona
Legg, Fiona
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Abstract
The study of soundscapes is crucial to monitoring the relationship between organisms and their environment. In this study, we characterize the marine soundscape of Ca�o Island Biological Reserve, Costa Rica, a popular diving destination and key breeding area for two humpback whale populations. A single autonomous recorder was deployed during wet (July-November) and dry (January-April) seasons from 2023-2025. Presence-absence of dolphins, humpback whales, fish, and boats was scored. General Linear and Additive Models were used to compare seasonal soundscape composition. Results show significant seasonal differences in soundscape (p<0.0001). Wet seasons were dominated by humpback whales from the BSG population, while dry seasons were dominated by fish and boats. Overall, boat presence peaked between 9a.m.- 3 p.m., which coincides with tour-boat activity. The findings underscore the value of long-term passive acoustic monitoring and highlight the need for improved management of boat noise within this marine protected area.
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Date
1/1/2026
Student Status
Senior (Graduating in 2026)
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Poster
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Environmental Science
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Rubenstein School of Environment and Natural Resources
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Life Science