BIO SCI 94 Lecture Notes - Lecture 16: Limiting Factor, Life Table, Balancing Selection

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Nancy Burley

Document Summary

Intrasexual competition (within the same sex; males) : advertisements of fighting ability. The above are types of behavior of frequency - dependent success rate. There are different types of signals (messages used to communicate to the opposite sex) used to court the opposing sex mate together. 1) advertisements of resources -- may increase # of offspring female produces. Females will rely on males catching insects for them the female eats the insect that means the female will mate with the male. If you have good resources, the female will want to mate with you. 2) advertisements of genetic quality: bright colors, long plumes, etc (in males) May increase quality of offspring female produces. In the whydah, males fight for territories. Signals - traits that have evolved to inform (true or false info) For a trait to evolve, must benefit sender. Benefits of deceit are frequency-dependent (balancing selection) Intersexual -- female choosing which male she should mate with.