Air breathing in Magadi tilapia Alcolapia grahami, under normoxic and hyperoxic conditions, and the association with sunlight and reactive oxygen species

O. E. Johannsson, H. L. Bergman, C. M. Wood, P. Laurent, D. G. Kavembe, A. Bianchini, J. N. Maina, C. Chevalier, L. F. Bianchini, M. B. Papah, R. O. Ojoo

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Observations of the Magadi tilapia Alcolapia grahami in hot, highly alkaline Lake Magadi revealed that they air breathe not only during hypoxia, as described previously, but also during normoxia and hyperoxia. Air breathing under these latter conditions occurred within distinct groupings of fish (pods) and involved only a small proportion of the population. Air breathing properties (duration and frequency) were quantified from video footage. Air breathing within the population followed a diel pattern with the maximum extent of pod formation occurring in early afternoon. High levels of reactive oxygen species (ROS) in the water may be an irritant that encourages the air-breathing behaviour. The diel pattern of air breathing in the field and in experiments followed the diel pattern of ROS concentrations in the water which are amongst the highest reported in the literature (maximum daytime values of 2·53-8·10 μM H2O2). Interlamellar cell masses (ILCM) occurred between the gill lamellae of fish from the lagoon with highest ROS and highest oxygen levels, while fish from a normoxic lagoon with one third the ROS had little or no ILCM. This is the first record of air breathing in a facultative air-breathing fish in hyperoxic conditions and the first record of an ILCM in a cichlid species.

Original languageEnglish
Pages (from-to)844-863
Number of pages20
JournalJournal of Fish Biology
Volume84
Issue number3
DOIs
StatePublished - Mar 1 2014

Fingerprint

Tilapia (Cichlidae)
breathing
reactive oxygen species
solar radiation
air
fish
pods
lagoon
hyperoxia
normoxia
Alcolapia grahami
cichlid
cells
hypoxia
gills
water
oxygen
lakes
duration
lake

Keywords

  • Diel patterns
  • Gill remodelling
  • Interlamellar cell mass

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics

Cite this

Air breathing in Magadi tilapia Alcolapia grahami, under normoxic and hyperoxic conditions, and the association with sunlight and reactive oxygen species. / Johannsson, O. E.; Bergman, H. L.; Wood, C. M.; Laurent, P.; Kavembe, D. G.; Bianchini, A.; Maina, J. N.; Chevalier, C.; Bianchini, L. F.; Papah, M. B.; Ojoo, R. O.

In: Journal of Fish Biology, Vol. 84, No. 3, 01.03.2014, p. 844-863.

Research output: Contribution to journalArticle

Johannsson, OE, Bergman, HL, Wood, CM, Laurent, P, Kavembe, DG, Bianchini, A, Maina, JN, Chevalier, C, Bianchini, LF, Papah, MB & Ojoo, RO 2014, 'Air breathing in Magadi tilapia Alcolapia grahami, under normoxic and hyperoxic conditions, and the association with sunlight and reactive oxygen species', Journal of Fish Biology, vol. 84, no. 3, pp. 844-863. https://doi.org/10.1111/jfb.12289
Johannsson, O. E. ; Bergman, H. L. ; Wood, C. M. ; Laurent, P. ; Kavembe, D. G. ; Bianchini, A. ; Maina, J. N. ; Chevalier, C. ; Bianchini, L. F. ; Papah, M. B. ; Ojoo, R. O. / Air breathing in Magadi tilapia Alcolapia grahami, under normoxic and hyperoxic conditions, and the association with sunlight and reactive oxygen species. In: Journal of Fish Biology. 2014 ; Vol. 84, No. 3. pp. 844-863.
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