Short communications: Are wild African lungfish obligate air breathers? Some evidence from radio telemetry

  • C.M. Mlewa
  • J.M. Green
  • R. Dunbrack
Keywords: Protopterus aethiopicus, air-breathing fishes, aquatic respiration, Lake Baringo, radio-tagged lungfish.

Abstract

Laboratory studies have resulted in classification of the marbled African lungfish,  Protopterus aethiopicus, as an obligate air-breather. However, there have been no investigations of the extent of dependence on aerial respiration by this species in the wild. We used radio telemetry to obtain quantitative information on the surfacing frequency of lungfish in Lake Baringo. The results showed radio-tagged lungfish came to the surface during the period immediately following their release but that aerial  respiration later ceased, indicating that the fish were able to meet their metabolic oxygen requirements solely through aquatic respiration. These results suggest that  under certain conditions lungfish in the wild may not be obligate air breathers and that the use of aerial respiration may be a function of ecological as well as physiological factors.


Key words: Protopterus aethiopicus, air-breathing fishes, aquatic respiration, Lake  Baringo, radio-tagged lungfish.

Published
2017-03-22
Section
Articles

Journal Identifiers


eISSN: 2224-073X
print ISSN: 1562-7020