10 8 Lecture summary Competition Intraspecific Competition comp between individuals of the same species for the same resource 1 Competition for individual survival food space light water etc 2 Competition for reproductive success sexual selection comp with same sex for mate Male Competition Male fighting Threat displays this leads to sexual dimorphism Sexual Dimorphism Also sperm competition of sperm sperm removal Guarding females When male look diff than females Female Choice Choose for traits with potential for reproductive success health wealth power Males are less discriminating than females males have lower investment in reproduction Notice traits w o apparent survival value peacocks this causes runaway selection Runaway selection Females choose males with fancy tails daughter tends to select mate with fancy tail son gets the fancy tail too repeat How are these preferences developed Some are learned Some genetic seagulls fish with longer tails Intraspecific Cooperation Why Food Avoid preds Build shelter Care giving etc Kin selection nat selection that favors traits that increase survival or reproduction for the individuals in the kin even it comes from self sacrifice Inclusive Fitness sum of the reproductive success of individuals sharing a genotype father mother son Individual Fitness of individuals or offspring
View Full Document
Unlocking...