Murky Water Keeps Fish on Edge

Typography

A study led by researchers at the ARC Centre of Excellence for Coral Reef Studies at James Cook University found fish become anxious and more cautious when water quality is degraded by sediment, an effect that could stunt their growth and damage their health.

A study led by researchers at the ARC Centre of Excellence for Coral Reef Studies at James Cook University found fish become anxious and more cautious when water quality is degraded by sediment, an effect that could stunt their growth and damage their health.

Senior author, Associate Professor Jodie Rummer says there is more sediment in coastal waters than ever before.

“Suspended sediment concentrations in tropical coastal waters have increased substantially over the past few decades as a result of human activities. We wondered if this reduced visibility affected fish performance, especially their ability to escape predators,” she said.

The scientists, led by PhD student Sybille Hess, examined the response of one-month-old cinnamon anemonefish to a simulated predator attack after they had been living in a sediment-filled tank for seven days.

Read more at ARC Centre of Excellence for Coral Reef Studies

Image: Anenomefish (Credit: ARC CoE for Coral Reef Studies/ Sofia Jain Schlaepfer)