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Water and electrolyte content and distribution in tissues of thermally-acclimated rainbow trout, Salmo gairdneri

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dc.contributor.author Mearow, Karen M. en_US
dc.date.accessioned 2009-07-09T18:54:49Z
dc.date.available 2009-07-09T18:54:49Z
dc.date.issued 1978-07-09T18:54:49Z
dc.identifier.uri http://hdl.handle.net/10464/2226
dc.description.abstract The primary objective of this investigation was that of providing a comprehensive tissue-by-tissue assessment of water-electrolyte status in thermally-acclimated rainbow trout, Salmo gairdneri. To this end levels of water and the major ions, sodium, chloride and potassium were evaluated in the plasma, at three skeletal muscle sites, and in cardiac muscle, liver, spleen, gut and brain of animals acclimated to 2°, 10° and 18°C. The occurrence of possible seasonal variations in water-electrolyte balance was evaluated by sampling sununer and late fall-early winter populations of trout. On the basis of values for water and electrolyte content, estimates of extracellular and cellular phase volumes, cellular electrolyte concentrations and Nernst equilibrium potentials were made. Since accurate assessment of the extracellular phase volume is critical in the estimation of cellular electrolyte concentrations and parameters based on assumed cellular ion levels, [14 C]-polyethylene glycol-4000, which is assumed to be confined to the extracellular space, was employed to provide comparisons with various ion-defined spaces (H20~~s, H20~~/K and H20~~s). Subsequently, the ion-defined space yielding the most realistic estimate of extracellular phase volume for each tissue was used in cellular electrolyte calculations. Water and electrolyte content and distribution varied with temperature. Tissues, such as liver, spleen and brain appeared to be the most thermosensitive, whereas skeletal and cardiac muscle and gut tissue were less influenced. 'Summer' series trout appeared to be more capable of maintaining their water- electrolyte balance than the ~fall-winter' series animals. i The data are discussed in terms of their possible effect on maintenance of appropriate cellular metabolic and electrophysiological functions. en_US
dc.language.iso eng en_US
dc.publisher Brock University en_US
dc.subject Rainbow trout. en_US
dc.subject Temperature--Physiological effect. en_US
dc.subject Water--Electrolysis. en_US
dc.subject Tissues. en_US
dc.title Water and electrolyte content and distribution in tissues of thermally-acclimated rainbow trout, Salmo gairdneri en_US
dc.type Electronic Thesis or Dissertation en_US
dc.degree.name M.Sc. Biological Sciences en_US
dc.degree.level Masters en_US
dc.contributor.department Department of Biological Sciences en_US
dc.degree.discipline Faculty of Mathematics and Science en_US


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