Biology 3436F/G Lecture 24: 3436F - Lecture 24 - Guest Lecture.docx
24 Jan 2015
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Indirect benefits: wide variety of perching birds had lower number of parasites, birds may advertise their immune system by colouration, males that had more red had fewer parasites, bauer birds, builds elaborate bauers of twigs, the more elaborate the bauer, the fewer parasites, the more ultra violet their plumage, the healthier they are. Mate choice hypotheses: males presents themselves to the females, good genes, most valid to explain plumage in birds, certain alleles that advantageous that the female mating with that male, the offspring will inherit these, additive effect, builds on top, genetic compatibility, how the genes interact, the more shared mhc alleles there are, the more immune they are to pathogens, fisherian runaway selection, if female likes a certain trait and this continues to happen, the trait may become disadvantageous to survival, it is not always good to have this, trait selection and preference for the trait start to coevolve.
