Sharks Can Hear Sounds from Over 250 Feet Away

Topic: Biology

Scientists studied blacktip sharks and found they can detect sounds from far away. They used an underwater speaker and a drone to test how far sharks could hear. The study shows that sharks can not only hear sounds but also determine where they are coming from.

The ocean is full of sound, and for sharks, these sounds can be very important. They can tell what's happening around them even if it's far away. But scientists didn't know how far a shark swimming freely in the ocean could hear or whether it could tell where a distant sound was coming from.

A team of researchers from Florida Atlantic University wanted to find out. They chose blacktip sharks because they are common in Southeast Florida and can be easily studied. The researchers used an underwater speaker, a drone, and wild sharks swimming naturally in coastal waters. They found that the sharks could detect sounds from far away and even turn away from the source.

The study shows that sharks can hear low-frequency sounds from up to 74 meters (243 feet) away. This is much farther than previously thought. The researchers also found that the sharks were most sensitive to lower frequency sounds, which they detected from greater distances and at lower sound levels.

Why It Matters

This study helps us understand how sharks communicate and navigate their environment. It's also important for conservation efforts because it shows that sharks are capable of detecting and responding to sounds in their surroundings.

Key Facts

• Scientists studied blacktip sharks in Southeast Florida to see how far they could hear.
• The researchers used an underwater speaker, a drone, and wild sharks swimming naturally in coastal waters.
• Sharks can detect low-frequency sounds from up to 74 meters (243 feet) away.
• The study shows that sharks are most sensitive to lower frequency sounds.
• The findings were published in the journal Integrative Organismal Biology.

Key Terms

Acoustic far field

The area where sound behaves differently than close to the source.

Particle motion

The movement of particles in a medium, such as water or air, that carries sound waves.

Implications

This study helps us understand how sharks communicate and navigate their environment. It's also important for conservation efforts because it shows that sharks are capable of detecting and responding to sounds in their surroundings.