Male-Male Competition as a Force in Evolutionary Diversification: Evidence in Haplochromine Cichlid Fish
Figure 2
The display and attack ratios of Pundamilia males from five separate locations [4]. The different Pundamilia phenotypes are indicated below with numbers: the single-species population (1) intermediate between blue and red, mostly bluish, Luanso Island, , the hybridising, incipient species populations (2) blue phenotypes, ; (3) red phenotypes, , Kissenda Island Island; (4) blue phenotypes, ; (5) red phenotypes, , Python Island Islands and the two-species populations (reproductively isolated sister species, (6) P. Pundamilia, ; (7) P. nyererei, , Makobe Island, (8) P. βpink analβ, , Makobe Island; (9) P. Pundamilia, ; (10) P. nyererei, , Senga Point. The response ratio is the response to the blue stimulus divided by the sum of the responses to the red and blue stimuli. A response ratio of 0.5 represents identical responses to the two stimuli (-β-β-). Symbols indicate mean Β± SE values. Black symbols denote red males; white symbols denote blue males. Circles denote display behaviour, triangles denote attack behaviour. Data from [46, 51].
