Understanding Fish Sound Localization

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The chapter delves into how fish determine the direction of sound sources underwater, highlighting differences in mechanisms compared to humans. Researchers study fish communication using specialized setups and techniques like sound playback in tanks filled with water. The findings shed light on fish sound localization through a combination of particle motion and pressure sensitivity, raising questions about the role of the fish's brain in the process.

00:46 How light touches are sensed during sex

150 years after they were discovered, researchers have identified how specific nerve-cell structures on the penis and clitoris are activated. While these structures, called Krause corpuscles, are similar to touch-activated corpuscles found on people’s fingers and hands, there was little known about how they work, or their role in sex. Working in mice, a team found that Krause corpuscles in both male and females were activated when exposed to low-frequency vibrations and caused sexual behaviours like erections. The researchers hope that this work could help uncover the neurological basis underlying certain sexual dysfunctions.

News: Sensory secrets of penis and clitoris unlocked after more than 150 years

Research article: Qi et al.

News and Views: Sex organs sense vibrations through specialized touch neurons

07:03 Research Highlights

Astronomers struggle to figure out the identity of a mysterious object called a MUBLO, and how CRISPR gene editing could make rice plants more water-efficient.

Research Highlight: An object in space is emitting microwaves — and baffling scientists

Research Highlight: CRISPR improves a crop that feeds billions

09:21 How fish detect the source of sound

It’s long been understood that fish can identify the direction a sound came from, but working out how they do it is a question that’s had scientists stumped for years. Now using a specialist setup, a team of researchers have demonstrated that some fish can independently detect two components of a soundwave — pressure and particle motion — and combine this information to identify where a sound comes from.

Research article: Veith et al.

News and Views: Pressure and particle motion enable fish to sense the direction of sound

D. cerebrum sounds: Schulze et al.