Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 8205
Title: Influence of water temperature on gill sodium, potassium-stimulated ATPase activity in juvenile coho salmon (Oncorhynchus kisutch)
Author: Waldo S. Zaugg, Lynn R. McLain
Publication Year: 1976
Journal: Comparative Biochemistry and Physiology Part A: Physiology
Volume: 54
Issue: 4
Pages: 419-421
  1. Gill sodium, potassium-stimulated ATPase activity was determined from December to July in gills of yearling coho salmon (Oncorhynchus kisutch) maintained at four temperatures:  6, 10, 15 and 20°C.
  2. Compared to fish held at 6°C, elevation in ATPase activity and the associated parr-smolt transformation were accelerated in fish at 10 and 15°C, whereas animals at 20°C experienced at best only a transitory elevation in activity.
  3. Fish transferred from one temperature to another developed ATPase activities characteristic of fish residing at temperatures to which they were transferred.
  4. Cold water (6°C) tended to preserve the elevated ATPase activity while higher temperatures (10 and 15°C) caused decreases after an initial accelerated increase.
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