BIO 111 lab 2 writeup

BIO 111 lab 2 writeup - David Shin Bio 111 Lab Wednsday...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
David Shin Bio 111 Lab Wednsday 4:50-7:50 TA: Jeffrey Vedanayagam . Lab 2: Sexual Selection and Mating Behavior Abstract The purpose of this experiment was to gain insight on sexual selection through the mating behavior of Nasonia vitripennis , a species of parasitic wasps. We therefore hypothesize that males will randomly mate with any female, non-virgin or virgin, as male fitness increases with number of mating times. First, the mating ritual between male and virgin female was observed four times. Next, males were introduced to random non-virgin and virgin females in a confined space; the subsequent choice of virgin/non-virgin female was recorded and repeated 8 times with random individuals each time. 63.75% of the time, virgin females were chosen for mating. Our hypothesis may indeed be correct; however, these results may be inconclusive due to certain biases. Intersexual selection may indeed be at work rather than an indication of male fitness. These results exhibit a bigger picture of pre-copulation behavior, leading to mate choice. Introduction Sexual selection, as proposed by Charles Darwin, is a concept necessary to portray evolutionary traits concerning mate choice and mate competition. Sexual selection is then organized into two categories: intrasexual(male to male) and intersexual(female choice) competition. Males usually only contribute sperm during the mating process and therefore invest little to offspring. In essence, males will compete with other males for as many females as possible in order to increase their fitness. Females then invest much more in offspring with pregnancy, rearing, etc. Thus, females do not compete with other females, but rather have the option of choosing males with the best qualities. The Good Genes Model states that differences in the male sexual traits are equivalent to some form of male fitness and thus, females will choose the best quality male because this male will have the best genes to pass onto offspring. This experiment will focus on the mating behavior of parasitic wasps,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

BIO 111 lab 2 writeup - David Shin Bio 111 Lab Wednsday...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online