EEB322H1 Lecture Notes - Lecture 8: Lek Mating, Directional Selection, Nuptial Gift
5 Feb 2017
School
Department
Course
Professor
Document Summary
Role reversal: the (behavioural) ecology and evolution of female specific. C. elegans have 2 sexes one is male and the other is a hermaphrodite. Males show up when the environment is good. Sequential hermaphrodite once they produce sperm they switch to producing eggs. Hermaphrodites can"t mate which each other, only the male can transfer sperm to the hermaphrodite. Male invests more into offspring than females. Females display secondary sexual traits to attract mates ** Worth it if the females gets a good nuptial gift. Males wouldn"t want to mate with the most attractive female because it will be harder to insure that they inseminated the female. 1/3 of species have female specific ornaments. Large females = fecund females (more likely to have more offspring) Females have a large amount of variation in size of ornaments. Leg size is only important when abdomen size is small. If they have a large abdomen it doesn"t matter how big their legs are.
