Evaluation of pH Shock on Hatchery-reared Rainbow Trout
- 1 January 1979
- journal article
- research article
- Published by Oxford University Press (OUP) in The Progressive Fish-Culturist
- Vol. 41 (1) , 3-5
- https://doi.org/10.1577/1548-8659(1979)41[3:eopsoh]2.0.co;2
Abstract
The effect of transferring hatchery-reared rainbow trout (Salmo gairdneri)from water with a pH of 7.2 to water with pH's ranging from 8.5 to 10.0 was evaluated in 48-h tests. All fish survived in the control (pH 7.2) and at pH 8.5. Survival was 88% at pH 9.0, 68% at pH 9.5, and O at pH 10.0. After the 48-h exposure, the remaining test fish were fed their usual pelleted food. Trout in the control and those held at pH 8.5 fed well. Only a few of the fish held at pH 9.0, and none of those held at pH 9.5, fed. These data indicate that it is not advisable to stock rainbow trout reared in nearly neutral hatchery water into lakes with a pH of 9.0 or higher.This publication has 1 reference indexed in Scilit:
- Lethal Alkalinity for Trout in Waters of Low Salt ContentThe Journal of Wildlife Management, 1946