The influence of swimming activity on water balance in the rainbow trout (Salmo gairdneri)

Chris M. Wood, D. J. Randall

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

1. In the freshwater adapted rainbow trout, urine flow markedly increased during periods of exercise in a swimming respirometer. 2. Over a range of oxygen consumptions from "standard" to nearly "active metabolic rates", oxygen and water fluxes exhibited a highly significant positive correlation in individual fish. The results were indicative of covariation of the oxygen and water permeabilities of the gills. 3. A triphasic fluctuation in body weight, considered a measure of water balance, occurred during the course of exercise. On the basis of weight change and urine flow data, a tentative model of water regulation during swimming is presented. 4. Urinary levels of sodium and potassium tended to fall at high urine flows and rise at lowflows. Calcium and magnesium concentrations underwent simultaneous fluctuations which did not always correspond to alterations in urine volume. 5. The renal excretion rates of all four cations increased significantly during swimming activity.

Original languageEnglish
Pages (from-to)257-276
Number of pages20
JournalJournal of Comparative Physiology
Volume82
Issue number3
DOIs
StatePublished - Sep 1 1973

Fingerprint

Oncorhynchus mykiss
water balance
urine
rainbow
water budget
Urine
Water
exercise
Oxygen
oxygen
water
Fresh Water
oxygen consumption
Oxygen Consumption
excretion
Magnesium
Cations
Permeability
magnesium
cations

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Neuroscience(all)
  • Physiology (medical)
  • Physiology
  • Animal Science and Zoology

Cite this

The influence of swimming activity on water balance in the rainbow trout (Salmo gairdneri). / Wood, Chris M.; Randall, D. J.

In: Journal of Comparative Physiology, Vol. 82, No. 3, 01.09.1973, p. 257-276.

Research output: Contribution to journalArticle

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