Fin whale singing decreases with increased swimming speed

Area of Science:

• Marine Biology
• Bioacoustics
• Animal Behavior

Background:

• Male acoustic displays often signal fitness, but studying this in marine mammals is challenging.
• Fin whale songs are complex acoustic signals potentially linked to male reproductive status.

Purpose of the Study:

• To investigate the relationship between fin whale singing behavior and swimming speed.
• To understand how swimming speed might indicate a singer's physical condition and reproductive quality.

Main Methods:

• Utilized unique fin whale singing and swimming data from a US Navy marine mammal monitoring program.
• Analyzed correlations between swimming speed, song duration, and singing frequency in free-ranging fin whales.

Main Results:

• Some fin whales continued singing while increasing swimming speed; others ceased singing.
• Faster swimming while singing may serve as a display of male stamina and fitness.

Conclusions:

• Singing while swimming faster could be a signal of male reproductive quality to females and rivals.
• Findings have implications for understanding fin whale communication and the impact of anthropogenic noise on their mating strategies.