dc.contributor.author | Johnston, IA | |
dc.contributor.author | Eddy, FB | |
dc.contributor.author | Maloiy, GMO | |
dc.date.accessioned | 2013-07-22T08:33:30Z | |
dc.date.available | 2013-07-22T08:33:30Z | |
dc.date.issued | 1983 | |
dc.identifier.citation | Journal of Fish Biology Volume 23, Issue 6, pages 717–724, December 1983 | en |
dc.identifier.uri | http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8649.1983.tb02949.x/abstract | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/49553 | |
dc.description.abstract | The concentrations of phosphorylcreatine (PCr), adenosine triphosphate (ATP), adenosine diphosphate (ADP), adenosine monophosphate (AMP), inorganic phosphate (Pi), pyruvate and lactate were determined in freeze-clamped fast muscle samples from Oreochromis alcalicus grahami a fish adapted to extreme alkalinity (∼ pH 10·0) and high temperatures (Lake Magadi, Kenya). Specimens were analysed from both geothermally heated hotsprings (35–37°C) and from isolated cool pools (28°C) and from stocks acclimated to 20°C in the laboratory. The ratios of (ATP)/(ADP) and (ATP)/(ADP) (Pi) decreased with increasing body temperature consistent with an increase in glycolysis and tissue respiration rates, respectively. The apparent equilibrium constant of creatine kinase (KCK), (creatine) (ATP)/(phosphorylcreatine) (ADP) was found to decrease with increasing temperature: 20·2 (20°C), 13·9 (28°C), 8·0 (37°C). A near constant muscle and blood pH (or slight increase in alkalinity with higher temperatures) was found regardless of body temperature (Blood pH 7·64, 7·74, muscle pH 7·27, 7·51 at 20°C and 35°C, respectively). These results are consistent with an unusual pattern of acid-base regulation in this species. | en |
dc.language.iso | en | en |
dc.publisher | Wiley | en |
dc.title | The effects of temperature on muscle pH, adenylate and phosphogen concentrations in Oreochromis alcalicus grahami, a fish adapted to an alkaline hot-spring | en |
dc.type | Article | en |
local.publisher | Department of Animal Physiology, University of Nairobi, | en |