BIOL 3300 Chapter Notes -Bighorn Sheep, Earwax, Deimatic Behaviour
Document Summary
Mutation and migration can introduce new alleles. Adaptation trait (s) that increase individual fitness. Oxpeckers believed to reduce numbers of ticks on cattle. Spend 85% of the time grooming cattle, probing in the ear. Exclusion experiments: control group: birds, experimental group: birds excluded. How are the birds excluded: a man literally chased the birds around to keep them away from the cattle. How many individuals were looked at: 1st month: two groups, 2nd month: switch treatments, 3rd month: randomly reassigned cattle, at the beginning and end of each month measurements were made: The number of ticks: we predict the number of ticks would increase when the birds were excluded. We can see in 2 instances (trials 1&3) that cattle did have a larger number of ticks when the birds were excluded. There was 1 case where less ticks were found with birds excluded. None of the cases are significantly different from one another.
