Serum stress responses during seawater acclimation in Coho Salmon, Oncorhynchus kisutch
SCOPUS
KCI
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Title
- Serum stress responses during seawater acclimation in Coho Salmon, Oncorhynchus kisutch
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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)
- Park, Yong Joo(박용주)
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Alternative Author(s)
- 홍경표; 박용주; 명정구; 김종만
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Publication Year
- 2004
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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.
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ISSN
- 1598-141X
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/5322
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DOI
- 10.4217/OPR.2004.26.3.433
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Bibliographic Citation
- Ocean and Polar Research, v.26, no.3, pp.433 - 438, 2004
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Publisher
- Korea Ocean Research and Development Institute
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Subject
- acclimation; behavioral response; salmonid; seawater; smolt; Oncorhynchus; Oncorhynchus kisutch; Pisces; Salmonidae
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Keywords
- Coho salmon; Seawater acclimation; Serum concentration; Stress response
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Type
- Article
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Language
- Korean
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Document Type
- Article
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