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Similar to The effects of bot fly parasitism on mate choice in white-footed mice (Peromyscus leucopus)
Similar to The effects of bot fly parasitism on mate choice in white-footed mice (Peromyscus leucopus) (20)
The effects of bot fly parasitism on mate choice in white-footed mice (Peromyscus leucopus)
- 1. The Effects of Bot Fly Parasitism on Mate Choice in White-Footed Mice ( Peromyscus leucopus ) Michael J. Cramer and Guy N. Cameron Department of Biological Sciences University of Cincinnati
- 6. Peromyscus Bot Fly Life Cycle Females lay eggs in host habitat. Hosts pick up newly hatched larvae . Larvae migrate to inguinal region and develop warble. After 3 rd instar, larvae exit host and burrow underground to pupate. Flies emerge and mate at aggregation sites. 5 days 21 days P. Meyer C. N. Shiffer M. J. Cramer
- 11. Mate Choice Paired t-test t 15 = 2.355; p = 0.033
- 13. Body Size and Mate Choice Paired t-test t 15 = 2.765; p = 0.014
- 14. Body Size and Mate Choice F 1, 14 = 14.732, p = 0.001
Editor's Notes
- Sexual selection is an important force in evolutionary and behavioral ecology since Darwin proposed it as an alternative hypothesis to explain the existance of traits inconsistent with natural selection SS is similar to NS except individuals are selected to maximize number of mating opportunities through two mechanisms w/in sexes--individuals compete for access to mates b/t sexes--mating is determined by one sex choosing mates based on some characteristic strength of sexual selection based on mating system in which mating opportunities are limited
- Parasites could disrupt sexual selection by affecting competitive ability and/or affecting mate choice
- Infected males may be avoided as mates for the following reasons 1. females may develop infections 2. parasites may be passed to offspring neither of these is probable based on bot fly biology 3. male has low resistance to parasites which could be passed to offspring (low genetic quality)
- grids were .25 ha reproductive condition based on location of testes for males and whether vagina was open or closed for females
- trials videotaped to reduce mouse response to observer chamber divisions: large central section flanked by 2 smaller sections male separated from female: allowed female to smell male but did not allow males to interact
- contrary to expectations females spent significantly more time with infected males
- males gain weight with infection independent of weight of parasite
- Zahavi: males may be better providers for their offspring and/or may confer a genetic advantage (tolerance for common parasite)