PCB 4674 Lecture Notes - Lecture 26: Hermaphrodite, Parental Investment
21 Dec 2016
School
Department
Course
Professor
Document Summary
Number of mates had a larger impact on the reproductive success of males than on the reproductive success of females. Not a super clean experiment, can definitely be criticized on methodological grounds: mating success and reproductive success in a hermaphrodite. 24 mating groups of 5 virgins each (total 120 snails) May (cid:271)e a differen(cid:272)e (cid:271)et(cid:449)een an indi(cid:448)idual"s copulatory mating success versus its genetic mating success. Copulatory mating success: number of times a snail copulated. Genetic mating success: number of copulations that yielded at least one surviving biological offspring: total: 100 snails made at least one offspring as the father, and 103 made at least one offspring as the mother. ~2/3 of the snails played both roles. Take into account- stronger sexual selection on males and females cannot lead to the evolution of sexual dimorphisms- by definition, hermaphrodites cannot be dimorphic: mating success and reproductive success in a newt. Males gather in ponds in the early winter to wait for females.
