Intestinal water transport in juvenile Atlantic salmon (Salmo salar L.) during smolting and following transfer to seawater

Comp Biochem Physiol A Comp Physiol. 1991;100(4):813-8. doi: 10.1016/0300-9629(91)90297-p.


1. The rate of mucosal to serosal water movement was measured in vitro in non-everted midgut segments in Atlantic salmon (Salmo salar L.) during parr-smolt transformation (February-July) and following transfer of smolts to seawater in May. 2. The rate increased significantly during smolting from 5.61 microliters/cm2/hr in the parr (February) to 11.03 microliters/cm2/hr in smolts in May. 3. Measured at intervals over a period of 20 days in seawater, the rate of water transport was not significantly different from that found in the freshwater-adapted smolts (11.20 microliters/cm2/hr). 4. Intestinal water transport is sodium-linked and inhibited by ouabain but is not stimulated by cortisol.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptation, Physiological*
  • Analysis of Variance
  • Animals
  • Biological Transport / drug effects
  • Choline / pharmacology
  • Fresh Water
  • Intestinal Mucosa / metabolism*
  • Ouabain / pharmacology
  • Salmon / growth & development
  • Salmon / metabolism*
  • Seasons
  • Seawater*
  • Water / metabolism*


  • Water
  • Ouabain
  • Choline