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Figure 1 | Frontiers in Zoology

Figure 1

From: Self-sacrifice in 'desperado' contests between relatives

Figure 1

Conditions favouring not fighting by Q2 for contestants of equal fighting ability. Critical values of d for which not fighting (above the line) or fighting (below the line) is favoured, for all values of r, from equation {4}. When fighting abilities are equal (a = ½), the decision whether to fight or not is a function of d and r. This figure indicates that Q2 increasingly favours not fighting for increasing values of r and d. When contestants are full sisters (r = 0.75), Q2 will not fight unless the risk of both queens dying is very low (d < 0.143).

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