Data from: Genetic and environmental effects on the morphological asymmetry in the scale-eating cichlid fish, Perissodus microlepis

Hyuk Je Lee, Valentin Heim & Axel Meyer
The scale-eating cichlid fish, Perissodus microlepis, from Lake Tanganyika are a well-known example of an asymmetry dimorphism because the mouth/head is either left-bending or right-bending. However, how strongly its pronounced morphological laterality is affected by genetic and environmental factors remains unclear. Using quantitative assessments of mouth asymmetry, we investigated its origin by estimating narrow-sense heritability (h2) using midparent–offspring regression. The heritability estimates [field estimate: h2 = 0.22 ± 0.06, P = 0.013; laboratory estimate: h2...
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