BIO318Y5 Lecture : 2nd half Lecture 2
Document Summary
Adaptation: a trait that increases the fitness of it"s bearer and that evolved for that specific role. Parasites manipulating hosts hypothesis testing & the culture of science. Parasite wasp larvae live inside caterpillar which then acts maternally! Flukes make ants go to top of vegetation where the ant gets eaten by a cow! Malaria: mosquito -> human (some parasites go through different hosts) Horsehair worm infects aquatic insect which then dies and gets eaten by another insect which then gets infected the return to the water to die. Worm comes out of the dying cricket then mates in the water. Hypo 1: worm makes cricket jump into water. The prevalence of infection (by worms) was very different between (crickets) collected in the forest (15%) and those collected around the swimming pool (95%). Cricket manipulation theory is true for the cricket because worm releases chemicals to control cricket brain! Thorny-headed worm (acanthocephala: lives in guts of (intermediate host) sowbugs armadillium.
