...but it's a busy time right now. Some news items tonight, and tomorrow some contributions from the Fish Brigade.
A new offering from Current Biology examines the stereo component of shark olfaction. It's no secret that sharks can "track" small concentrations of substances (like blood) in the water. The new research led by Jayne Gardiner at the University of South Florida determines that the fish can sense small delays in the time required to reach one nostril compared to the other. When they do so, they turn in the direction from which the odor is coming. This contradicts the long-held notion that directionality was determined by concentration differences - and makes more sense. The work is summarized here at Science Daily.
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