How the midshipman fish sustains its hour-long mating call

http://ift.tt/eA8V8J Researchers have discovered how the Pacific midshipman fish can hum continuously for up to an hour in order to attract potential mates. The study explains how the muscle fibers surrounding the fish's swimbladder can sustain the high rates of contraction -- up to 100 times per second -- that are needed to produce the animal's distinctive call.

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