Biology 3593B Study Guide - Quiz Guide: Bird Vocalization, Courtship Display, Great Tit
Document Summary
Themes: how communication systems evolve, use selfish gene approach, survival value of signals and responses, key point: genes producing signals are different from genes in receivers making them respond to signals. Gulls: threat display, grass-pulling, alarm calls,danger calls, mewing calls, long call, choking etc. Roaring and parallel walking of red deer stags. Courtship displays, see film making sex pay, e,g, grebe on whiteknights lake. Male sedge warbers with larger song repertoires get to pair earlier and produce more chicks. But perhaps males with larger repertoires arrive earlier. Females sedge warblers prefer males with larger song repertoires. Catchpole"s study of sedge warblers suggested that genes are selected which make males sing more songs. Great tits with larger song repertoires deter male rivals. Roars of larger red deer stags get females attention small. These examples show there is survival value, i. e. fitness benefits, to: These traits attract females or deter rivals and so increase reproductive success.
