Green and yellow light guide newborn whitefish to safety—but warming waters cause issues

How do minute fish larvae find their way in complex and dangerous environments? And what role do different light colors play in their journey? These questions have hardly been researched. A new study by the Fisheries Research Station (FFS) and the University of Konstanz, which lie on the shores of Lake Constance, has uncovered, for the first time in such detail, how young Lake Constance whitefish (Coregonus wartmanni) use light to find suitable habitats—and how sensitive this system is to environmental changes. The findings are published in the journal Freshwater Biology.