Serum stress responses during seawater acclimation in Coho Salmon, Oncorhynchus kisutch SCOPUS KCI

Title
Serum stress responses during seawater acclimation in Coho Salmon, Oncorhynchus kisutch
Author(s)
Hong, K.-P.; Kim, P.-K.; Jeon, J.-K.; Kim, Y.; Park, Y.-J.; Myoung, J.-G.; Kim, J.M.
KIOST Author(s)
Myoung, Jung Goo(명정구)
Publication Year
2004
Abstract
Stress response to the seawater acclimation in coho salmon (Oncorhynchus kisutch) smolt was investigated. Salt concentration of rearing water was gradually increased for 3 days from freshwater to seawater (30 ppt salt level). The changes of serum concentrations of cortisol as a primary stress indicator, and as secondary indicators, glucose (GLC), lactate (LAC), triglyceride (TG), cholesterol (CHOL), sodium ion (Na+ , chloride ion (Cl-) and enzyme activities (alanine aminotransferase, ALT; aspartate aminotransferase, AST; lactate dehydrogenase, LDH) were quantified during the acclimation experiment. Among them, cortisol, LAC, TG, CHOL, ALT, AST concentrations showed rapid increase at the first exposure to the 10 ppt salt level (day 1), and began to decrease to the constant values after day 2 of adaptation at 20 ppt salt level. However, LDH concentration tended to decrease during the whole experimental period. Na+ and Cl- showed slight decrease at day 1, and increased to a little bit higher values after day 2 rather than those in freshwater. All the fishes started on taking a food after day 4 of seawater adaptation. From these results, to reduce osmotic shock inducible stress to fish in seawater acclimation, gradual increase of salt levels is recommended.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5322
DOI
10.4217/OPR.2004.26.3.433
Bibliographic Citation
Ocean and Polar Research, v.26, no.3, pp.433 - 438, 2004
Publisher
Korea Ocean Research and Development Institute
Subject
acclimation; behavioral response; salmonid; seawater; smolt; Oncorhynchus; Oncorhynchus kisutch; Pisces; Salmonidae
Keywords
Coho salmon; Seawater acclimation; Serum concentration; Stress response
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Fish ecology,Fish taxonomy,Fish stock enhancement,어류생태,어류분류,어류자원증식

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