BIO 1130 Lecture Notes - Lecture 8: Sperm Competition, Ptiloris, Genetic Drift

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Females choose males based on dimorphic characteristics (fitness) Females want best sperm possible (males have unlimited sperm so essentially they could mate endlessly. But, females must be picky because they have limited eggs) males much demonstrate females that they are fit enough to mate. (riflebird) females pick the males with long tails. Males battle each other out and maintain dominance over females. A whole bunch of females belong to one male. Males try to mate with the females on the periphery where the master cannot fight them. Males give the female bug a package of sperm. Male mated with female and is guarding the female. Scrapes other males sperm out of her. Puts his sperm in her then guards her. Females may eject the sperm if she doesn"t like it. Dominant male kills every lion cub in pac that belongs to previous male that he had defeated. Dominant male mates with females now to produce new cubs.