Data from: Mouth dimorphism in scale-eating cichlid fish from Lake Tanganyika advances individual fitness

Adrian Indermaur, Anya Theis, Bernd Egger & Walter Salzburger
Random asymmetry, that is the co-existence of left- and right-sided (or -handed) individuals within a population, is a particular case of natural variation; what triggers and maintains such dimorphisms remains unknown in most cases. Here, we report a field-based cage experiment in the scale-eating Tanganyikan cichlid Perissodus microlepis (Boulenger, 1898), which occurs in two morphs in nature: left-skewed and right-skewed individuals with respect to mouth orientation. Using underwater cages stocked with scale-eaters and natural prey...
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