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An acute increase in water temperature can increase free amino acid concentrations in the blood, brain, liver, and muscle in goldfish (Carassius auratus).

Authors
  • Wang, Yunhao1, 2
  • Han, Guofeng1, 2
  • Pham, Cuong V1, 2
  • Koyanagi, Kiyohiko3
  • Song, Yandejia4
  • Sudo, Ryunosuke4
  • Lauwereyns, Johan4
  • Cockrem, John F5
  • Furuse, Mitsuhiro1
  • Chowdhury, Vishwajit S6
  • 1 Laboratory of Regulation in Metabolism and Behavior, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan. , (Japan)
  • 2 Laboratory of Stress Physiology and Metabolism, Faculty of Arts and Science, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, 819-0395, Japan. , (Japan)
  • 3 Fishery Research Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, Fukuoka, 819-0395, Japan. , (Japan)
  • 4 Laboratory of Cognative Neuroscience, Graduate School of System Life Sciences, Kyushu University, Fukuoka, 819-0395, Japan. , (Japan)
  • 5 School of Veterinary Science, Massey University, Palmerston North, 4442, New Zealand. , (New Zealand)
  • 6 Laboratory of Stress Physiology and Metabolism, Faculty of Arts and Science, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, 819-0395, Japan. [email protected] , (Japan)
Type
Published Article
Journal
Fish Physiology and Biochemistry
Publisher
Springer-Verlag
Publication Date
Aug 01, 2019
Volume
45
Issue
4
Pages
1343–1354
Identifiers
DOI: 10.1007/s10695-019-00642-5
PMID: 31001753
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Water temperature directly affects the body temperature in fish, so increasing water temperatures in oceans and rivers will lead to increases in fish body temperatures. Whilst a range of responses of fish to increases in water temperature have been measured, amino acid metabolism in a fish under high water temperature (HT) conditions has not been investigated. The aim of this study was to determine the effects of an acute increase in water temperature on oxygen consumption, plasma cortisol concentrations, and free amino acid concentrations in plasma and several tissues in goldfish (Carassius auratus). Oxygen consumption and plasma cortisol concentrations were increased in goldfish exposed to HT (30 ± 1 °C) for 200 min compared with goldfish at a control water temperature (CT 17 ± 1 °C). Oxygen consumption and plasma cortisol concentrations in both groups of fish combined were positively correlated. When goldfish were exposed to HT for 300 min oxygen consumption and plasma concentrations of 15 free amino acids were increased compared with goldish at CT. Concentrations of several free amino acids were increased to varying extents in the brain, liver, and muscle tissues. In conclusion, an acute increase in water temperature affected amino acid metabolism differently in the brain, liver, and muscle tissues. Goldfish will be a useful species for further studies of the possible roles of various amino acids in the brain, muscle, and liver during acute increases in water temperature in fish.

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