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Owing to the risk of inbreeding depression, the evolution of inbreeding avoidance by means of kin recognition is expected for many biological systems. Nevertheless, an ability to distinguish among relatives and non‐relatives has been only rarely demonstrated, especially so in non‐social organisms. We here show that, in the non‐social tropical butterfly Bicyclus anynana, females discriminate against...
The evolution and expression of mate choice behaviour in either sex depends on the sex‐specific combination of mating costs, benefits of choice and constraints on choice. If the benefits of choice are larger for one sex, we would expect that sex to be choosier, assuming that the mating costs and constraints on choice are equal between sexes. Because deliberate inbreeding is a powerful genetic method...
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