Walleye Bones Can ‘Hear’ the Sound of Overfishing

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Otoliths, also called “ear stones,” are used by fish to sense their balance and movement in the water.

A university study on Lake Erie walleye may help scientists spot rivers that are at risk of overfishing. Researchers at Ohio State analyzed chemicals found in walleye ear bones, and were able to figure out which fish returned to their hatching site to spawn, and which ones went elsewhere, creating some rivers that are vulnerable to overfishing. The fish seem to be saying, “Can you hear me now?”

Ecologists have long thought that most fish spawn in the same river where they hatched. But that’s not always the case, with Lake Erie walleye at least….

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Successful Common Sense Conservation on the Great Reef Flummoxes Commercial Fishing

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stop overfishing and the fish increase – no kidding?

A controversial decision to halt commercial and recreational fishing across vast areas of the Great Barrier Reef has proven remarkably effective for reviving coral trout numbers.

“Everyone is a little surprised,” admits Garry Russ, a marine biologist at James Cook University in Townsville.

Continue reading… “Successful Common Sense Conservation on the Great Reef Flummoxes Commercial Fishing”

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