BIO 200LLB Lecture Notes - Lecture 18: Honey Bee, Damselfly, Inclusive Fitness

• School: University at Buffalo
• Department: Biological Sciences
• Course: BIO 200LLB
• Professor: Herreid, C F

Document Summary

Competition between members of the same species for resources. E. g. food, space, sunlight, shelter, oxygen, water. Competition among individuals of the same sex for reproductive success. E. g. insect barbed penises scoop out competitor"s sperm. E. g. female blackbirds choose males with good territory. E. g. female barn swallows choose males with the longest tails. Traits selected with potential for reproductive success: Female chooses males with fancy tails songs get fancy. Males have a low cost of reproduction tails daughters get tendency to select fancy tails starts again. Handicap hypothesis: she is choosing those which have survived even in spite of possible disadvantages. Beauty hypothesis: she is choosing simply because she thinks the male is beautiful. Differences exist between the appearance of the sexes. A form of natural selection that favours traits that increase survival or reproduction of an individual"s skin at the expense of an individual.