Sharks Navigate by Nose

Discovery News, January 6, 2016
……We are hypothesizing that these sharks are following chemical gradients,” Nosal said. “These gradients are correlated with coastal productivity, we have upwellings that fuel a lot of growth and that sustains a lot of organisms. There could be chemicals associated with increased productivity.”
Researchers in Florida’s Tampa Bay found similar results in tracking young blacktip sharks.
Jayne M. Gardiner, assistant biology professor at the New College of Florida, published a paper in 2015 in Integrative and Comparative Biology that found sharks with blocked noses also had trouble finding their way back to their home territory…..