Avoidance, confusion or solitude? Modelling how noise pollution affects whale migration.

Area of Science:

• Marine Biology
• Acoustics
• Computational Modeling

Background:

• Baleen whales rely on acoustic communication for navigation.
• Ocean noise levels have increased due to human activities.
• Dispersed whale groups may use collective communication for navigation.

Purpose of the Study:

• To investigate how rising ambient noise levels inhibit whale migration.
• To model the impact of noise on whale navigation mechanisms.

Main Methods:

• Developed a data-driven mathematical model.
• Simulated collective whale migration, auditory cue detection, and noise propagation.
• Compared navigation in pristine versus current soundscapes.

Main Results:

• Noise impairs whale navigation through diminished communication space, reduced auditory cue detection, and noise avoidance.
• Navigation impairment ranges from increased journey time to complete failure.
• Different noise mechanisms have distinct impacts on migration behavior.

Conclusions:

• Ambient noise poses a significant threat to whale migration.
• The model predicts varying degrees of migration alteration under future noise scenarios.
• Understanding noise impacts is crucial for marine conservation.