I would like to thank my Supervisor Professor Matthias Laska for his help and patience during this study. I would especially like to thank Sunna Edberg and Therése Höglin for teaching me how to do the data collection. Without the trainees from Himmelstalunds agricultural high-school and all the caretakers at the dolphinarium at Kolmården Wild Animal Park, this study would have been impossible to perform. Finally, I would like to thank Mats Amundin for the help during my time in Kolmården.