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Effects of Gradual Change of Salinity on Physiological Response in Hybrid Striped Bass (Morone chrysops × M. saxatilis)  

Lim, Han Kyu (Aquaculture Management Team, National Fisheries Research and Development Institute)
Han, Hyoung-Kyun (AquacultFinfish Research Center, National Fisheries Research and Development Institute)
Lee, Jong Ha (AquacultFinfish Research Center, National Fisheries Research and Development Institute)
Jeong, Min Hwan (Department of Aquaculture, Pukyong National University)
Hur, Jun Wook (Research institute of Marine Science and Technology, Korea Maritime University)
Publication Information
Korean Journal of Ichthyology / v.17, no.1, 2005 , pp. 43-48 More about this Journal
Abstract
We investigated physiological responses of hybrid striped bass (Morone chrysops ${\times}$ M. saxatilis) to gradual changes of salinity from 33 psu to 0 psu and from 0 psu to 33 psu in two separate trials. Gradual salinity change was not accompanied by an increase in cortisol level in the plasma however, the glucose level in the plasma increased. $Na^{+}$, $Cl^{-}$ and osmolality significantly increased with rising salinity, but they did not change with dropping salinity. The hybrid striped bass adjusted effectively without stress to the gentle change of salinity.
Keywords
Hybrid striped bass; salinity; stress response; surivaI; cortisol; glucose;
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