Inhibition of salt water survival and Na-K-ATPase elevation in steelhead trout (Salmo gairdneri) by moderate water temperatures
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Abstract
The steelhead trout metamorphosis from a freshwater parr to a sea water-tolerant smolt possessing the migration tendency was evaluated at six different growth temperatures ranging from 6 to 15 C during January through July. The highest temperature where a transformation was indicated was 11.3 C. By April fish reared at 6 C had elevated ATPase levels typical of smolts or migratory animals and showed 92% survival in sea water. Ten and 11.3 C-reared fish showed a short-lived elevation in ATPase in mid-April alone concurrently with 100% sea water survival at that time. Only in 6 C-reared animals did the salt water survival ability continue into May. High ATPase levels likewise were prolonged into May and June only in the 6 C-reared group. The data indicate that metamorphosis (and therefore successful migration) of juvenile steelhead trout is directly controlled by water temperature.
Suggested Citation
Adams, B., Zaugg, W., McLain, L.R., 1975, Inhibition of salt water survival and Na-K-ATPase elevation in steelhead trout (Salmo gairdneri) by moderate water temperatures: Transactions of the American Fisheries Society, v. 104, no. 4, p. 766-769, https://doi.org/10.1577/1548-8659(1975)104<766:IOSWSA>2.0.CO;2.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Inhibition of salt water survival and Na-K-ATPase elevation in steelhead trout (Salmo gairdneri) by moderate water temperatures |
| Series title | Transactions of the American Fisheries Society |
| DOI | 10.1577/1548-8659(1975)104<766:IOSWSA>2.0.CO;2 |
| Volume | 104 |
| Issue | 4 |
| Year Published | 1975 |
| Language | English |
| Publisher | Taylor & Francis |
| Contributing office(s) | Western Fisheries Research Center |
| Description | 4 p. |
| First page | 766 |
| Last page | 769 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |