Cetacean Acoustic Ecology and Welfare

Cetacean communication and navigation depend critically on acoustic environments that are increasingly degraded by shipping noise, sonar, and industrial activity.

Key Facts

Sperm whales communicate through complex click patterns (codas) that may encode cultural information
Bottlenose dolphins use unique signature whistles as individual identifiers throughout their lives
Blue whales produce the loudest biological sounds on Earth at up to 188 decibels
Anthropogenic noise causes displacement from critical habitat, communication masking, and stress in cetaceans
Military sonar has been linked to mass strandings of beaked whales through acoustic trauma
Shipping traffic doubles every decade, continuously increasing background ocean noise levels
Vessel speed reductions of 10 knots in critical areas can reduce cetacean noise exposure by 60%

Welfare Considerations

The acoustic ecology of cetaceans is inseparable from their welfare. Communication, navigation, foraging, and social bonding all depend on acoustic information processing that is increasingly compromised by human noise. Every additional ship, every sonar exercise, and every pile-driving operation degrades the sensory environment that cetaceans depend on. Quieter oceans are essential for cetacean welfare.

What You Can Do

Support campaigns for mandatory vessel speed reductions in cetacean habitat areas
Advocate for noise impact assessments to be required for all offshore industrial activities
Choose seafood from fisheries that use low-noise fishing methods
Support organisations monitoring cetacean acoustic ecology and noise pollution impacts
Engage with international shipping regulations that address ocean noise as a wildlife welfare issue