Death risk drives shocking love songs.(electric fish)(Brief Article)

Science News | July 17, 1999| | Copyright

The risk of getting killed often has a dampening effect on the silly excesses of courtship, but the opposite may have been true in electric fish.

The need to evade predators could have driven the electric serenades of knife fish to evolve from a simple zap ... zap ... zap to a variety of zippity doo-dahs, according to an analysis by Philip K. Stoddard of Florida International University in Miami. In the July 15 NATURE, he reports that a predator can't detect the complex signals as easily as the simple ones.

"Predators really have been a creative force," he ...

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