In these results we have used two sided control limits: one indicating the level of zero stress for the experimental birds and one indicating high level of stress initiated by natural predator mimicking.
The results of this experiment show that the zero stress level has an average of 9.2 pg/well. The high stress predator sound resulted in an average of 24.9 pg/well. The result for the ASR trial is 9.8 pg/well.