Direct male-male competition can facilitate invasion of new colour types in Lake Victoria cichlids

By P. Dijkstra, Ole Seehausen, Ton G. G. Groothuis. Behavioral Ecology and Sociobiology, 2005

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Is red an innate or learned signal of aggression and intimidation (2009, background): “Similar to recent findings for colour-polymorphic fish (Dijkstra et al. 2005), social experience with aggressive red and nonaggressive black males did not affect the winning success of either genetic red or black juveniles.”
Behavioral dominance between female color morphs of a Lake Victoria cichlid fish (2009, unknown): “…male color and dominance are correlated traits, with 1 color morph being behaviorally dominant over the other (e.g., fish: Barlow 1983; Kingston et al. 2003; Dijkstra et al. 2005, 2006; birds: Owen-Ashley and Butler 2004; Pryke and Griffith 2006; and lizards: Calsbeek and Sinervo 2002).”