Fig. 3
From: Sickle haemoglobin, haemoglobin C and malaria mortality feedbacks
The combined effect of βC and βS frequencies on overall population fitness. The colours in each panel indicate the mean fitness of a population with a specific combination of βC frequency (x-axis) and βS frequency (y-axis), relative to the fitness of an AA individual in a population of only AA individuals. The malaria mortality function applied in a is f 1 , where x = 0.01, z = 0.015 and γ = 0; the malaria mortality function applied in b is f 1 , where x = 0.01, z = 0.015 and γ = 10, and the malaria mortality function applied in c is f 2 , where x = 0.01, z = 0.015 and γ = 10. In all three panels, u = p