Coevolution Flashcards
Sexual conflict arises when:
The different optima cannot simultaneously be realised
Convolution arises when …
Sexes maximise their reproductive success in mutually incompatible ways
Conflict occurs over traits that are encoded by the same loci in sexes eg body size
Intralocus
Traits encoded by different loci so genes are sex limited in expression
Interlocus
Inter and intra locus can be intensified by:
Low relatedness between partners
Current v future reproductive investment
Sexual conflict leads to …
Sexually antagonistic convolution .. Like red queen hypothesis but between the sexes
Coevolution not automatic outcome, other alternatives are:
Sexually antagonistic coevolution
Phenotypic convergence via homologous genes
Occurs in part to simple underlying genetics
Change in 1 species has indirect effect on another species =
Interacting genomes
Response is
Inherited
Inter specific interactions:
Predator prey +/- Competition -/- Mutualism +/+ Neutralism 0/0 Commensalism +/0 Amensalism -/0
Character traits differ more in
Sympatric regions
Niche overlap results in character displacement
Natural selection drives to extreme to eliminate overlap of niches
Species can coexist if
Adaptations reduce competition
Coevolution ends if
1 species outcompetes and drives the other to extinction
Parallel evolution between taxa =
Adaptations and counter adaptations