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There were some contradiction between the results from the PCL data and the behavioural observation, probably due to the location of the PCL hydrophone. However when comparing the behvavioural data, in which it was clear that the dolphins investigated the fish setup significantly more than the float and the control setup, with the PCL data it could be concluded that the dolphins preferred the fish setup as an echolocation enrichment and spent more time investigating it. 

Due to the results from the present study it would be recommended to have live fish as an echolocation enrichment for dolphins in captivity. 

Further studies

Even though there seem to be only benefits of using live fish as an echolocation enrichment, the possible stress inflicted on the dolphins and fish would have to be evaluated further before installing a permanent enrichment in the dolphin enclosure. 

Responsible for this page: Agneta Johansson
Last updated: 05/24/16