dc.contributor.author | Johannsson, O. E | |
dc.contributor.author | Bergman, L. | |
dc.contributor.author | Wood, CM | |
dc.contributor.author | Kavembe,D.G | |
dc.contributor.author | Bianchini ,A | |
dc.contributor.author | Maina, J N | |
dc.contributor.author | Chevalier ,C | |
dc.contributor.author | Bianchini ,LF | |
dc.contributor.author | Papah ,MB | |
dc.contributor.author | Ojoo, RO | |
dc.date.accessioned | 2014-03-11T11:37:19Z | |
dc.date.available | 2014-03-11T11:37:19Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Feb 4, 2014 - 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 (et.el) | |
dc.identifier.uri | http://onlinelibrary.wiley.com/doi/10.1111/jfb.12289/pdf | |
dc.identifier.uri | http://hdl.handle.net/11295/65277 | |
dc.description.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. | en_US |
dc.language.iso | en | en_US |
dc.publisher | University of Nairobi, | en_US |
dc.subject | Diel patterns | en_US |
dc.subject | Gill remodelling | en_US |
dc.subject | Interlamellar cell mass. | en_US |
dc.title | Air Breathing In Magadi Tilapia Alcolapia Grahami, Under Normoxic And Hyperoxic Conditions, And The Association With Sunlight And Reactive Oxygen Species | en_US |
dc.type | Article | en_US |