Lung function measurements using spirometry in small cetaceans: Tursiops truncatus and Phocoena phocoena

Abstract

Pulmonary function testing, such as spirometry is a validated method to evaluate lung mechanics and resistance of the conducting airways. Until this moment there is very limited experience in the use of spirometry in small cetaceans. In this study 13 harbour porpoises (Phocoena phocoena) and 7 bottlenose dolphins (Tursiops truncatus) were measured using a pneumotachograph specifically designed for this purpose. They were measured inside as well as outside the water. Three of the animals had confirmed respiratory disorders. The measurements were well tolerated and the results were reproducible and reliable. The results represented a good overview of spirometric data in small cetaceans. Correlations were found in the porpoises between body size and spirometric data. Furthermore, differences were found in bottlenose dolphins while inside or outside the water, and in both species in animals with confirmed lung disorders. Because of the limited number of animals further studies are needed to confirm these findings.