BIOL 1004 Lecture Notes - Lecture 9: House Finch, Sexual Selection

• School: Carleton University
• Department: Biology
• Course: BIOL 1004
• Professor: Gregory Bulte

Document Summary

Sexual selection: form of natural selection in which individuals with certain inherited traits are more likely than other individuals to obtain mates. Different from natural selection because traits associated with mating success may be otherwise detrimental to survival. Most sexually dimorphic traits are the results of sexual selection. Display traits; like the peacock spiders, males has colourful trait that they dance with to communicate with female. Male displays something to the female and the female choices. O(cid:374)ly few (cid:373)ales (cid:272)a(cid:374) (cid:373)ate; o(cid:374)ly those stro(cid:374)g (cid:373)ales (cid:272)a(cid:374) (cid:373)ate so there"s a huge natural selection with the strong trait. Male weapons that they use to fight with other males. Males and females both have to produce gamates. Females produces few eggs, which cost a lot of energy. There"s a (cid:272)ost i(cid:374) produ(cid:272)i(cid:374)g offsprings are a huge investment. Male: more mates they can get, the more fitness. Females: fitness plateau; it does(cid:374)"t (cid:271)e(cid:374)efit the(cid:373) if they (cid:373)ate with a lot of (cid:373)ales.