Hawaiian Spinner Dolphins: Vulnerability to Climate Change and Exposure to Anthropogenic Sound
- Panday, Frances Marie
DOIAbstract
Cetaceans such as the Hawaiian spinner dolphin (Stenella longirostris) use the high-frequency (kHz) channel to communicate, find prey, and avoid predators. Anthropogenic activities, such as navigational sonar and vessel noise may result in acoustic disturbance or injury and impede dolphin behavior or have population-level impacts. Despite vessels producing lower frequency sounds (<400 Hz) that are detected at longer distances, it is still an effective proxy for sound propagation because higher frequency sounds are detected at shorter distances. This could mean overlap between vessel noise and dolphin hearing sensitivity, suggesting interference with their acoustic habitat. Climate change may also present additional threats to the distribut...
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