BIO220H1 Lecture Notes - Lecture 17: Kentish Plover, Stitchbird, Evolutionary Arms Race
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Parents provisioning resources at some rate: p. Increasing p = improving current offspring fitness but also less number of future offspring (less resources available for future offspring) C(p) = number of future offspring given up . Costs: c(p) = number of future siblings given up . Siblings are genetically related: r = : a gene that causes an offspring to take more resources now will reduce its own replication through future siblings. Offspring should maximize b(p) c(p) Benefits: b(p) = fitness of current offspring. Costs: c(p) = number of future offspring given up . All offspring are genetically related to the parent by r = . Parents should maximize b(p) c(p) optimal provisioning rate of parents and offspring is in conflict. In general, we expect an evolutionary conflict between parents and offspring over the level of care. This conflict can be resolved in many ways: parent wins, offspring wins, a compromise e. g. , optimal provisioning in stitchbirds.
