Publication: Osmoregulatory adaptations of freshwater air-breathing snakehead fish (Channa striata) after exposure to brackish water
Issued Date
2015-07-17
Resource Type
ISSN
01741578
Other identifier(s)
2-s2.0-84931008726
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology. Vol.185, No.5 (2015), 527-537
Suggested Citation
La iad Nakkrasae, Khanitha Wisetdee, Narattaphol Charoenphandhu Osmoregulatory adaptations of freshwater air-breathing snakehead fish (Channa striata) after exposure to brackish water. Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology. Vol.185, No.5 (2015), 527-537. doi:10.1007/s00360-015-0902-z Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/35131
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Osmoregulatory adaptations of freshwater air-breathing snakehead fish (Channa striata) after exposure to brackish water
Other Contributor(s)
Abstract
© 2015, Springer-Verlag Berlin Heidelberg. NaCl-rich rock salt dissolved in natural water source leads to salinity fluctuation that profoundly affects freshwater ecosystem and aquatic fauna. The snakehead (Channa striata) can live in saline water, but the osmoregulatory mechanisms underlying this ability remain unclear. Herein, we found that exposure to salinities ≥10 ‰ NaCl markedly elevated plasma cortisol and glucose levels, and caused muscle dehydration. In a study of time-dependent response after being transferred from fresh water (0 ‰ NaCl, FW) to salt-dissolved brackish water (10 ‰ NaCl, SW), FW–SW, cortisol increased rapidly along with elevations of plasma glucose and lactate. Interestingly, plasma cortisol returned to baseline after prolonged exposure, followed by a second peak that probably enhanced the branchial Na+/K+-ATPase activity. Under SW–FW condition, Na+/K+-ATPase activity was not altered as compared to SW-adapted fish. In conclusion, salinity change, especially FW–SW, induced a stress response and hence cortisol release in C. striata, which might increase plasma glucose and lactate to energize the branchial Na+/K+-ATPase.