Agnes M. Vanderpool  , Richard J. Strange  , Amanda E. Smith  , Henry G. Kattesh  , 
    Using Salt-Enriched Diets to Reduce Stress in Trout,
    Journal of Animal and Veterinary Advances,
    Volume 4,Issue 1,
    2005,
    Pages 22-27,
    ISSN 1680-5593,
    javaa.2005.22.27,
    (https://makhillpublications.co/view-article.php?doi=javaa.2005.22.27)
    Abstract: Chronically stressful conditions in fish culture facilities can lead to outbreaks of disease and reductions in growth and performance. A secondary response to stress in fish is the sudden and significant loss of plasma chloride ions, a condition known as hypochloremia. This loss of plasma chloride has been implicated as a cause of mortality in severely stressed fish. The effect of increased dietary salt on reducing hypochloremia in rainbow trout (Onchorynchus mykiss) subjected to a confinement challenge was investigated. Experimental diets included added NaCl or CaCl2. Trout fed salt-enriched diets suffered less hypochloremia in the early hours or confinement. Trout fed a higher level of NaCl had significantly higher recovery plasma chloride levels post-stress. Salt-enriched diets containing moderate levels of NaCl may offer some benefit in recovering trout that have been exposed to stress.
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