Diel changes in plasma arginine vasotocin, isotocin, and melatonin in rainbow trout (Oncorhynchus mykiss)
作者： E. Kulczykowska
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摘要: The diel changes in plasma AVT, IT and Mel rainbow trout (Oncorhynchus mykiss) were studied to assess potential relationships. Blood was sampled at 05:00, 11:00, 16:00, 22:30 05:00 freshwater-adapted fish brackish water-adapted maintained under natural photoperiod. A few of the FW-acclimated assigned one two experimental groups adapted DD or LL lighting regimes. samples taken 11:00 22:30. Hormones extracted from by solid phase extraction determined high-performance liquid chromatography. Marked variations AVT detected Plasma (fmol ml−1) increased during light reach maximal level end that (261.7±23.1). Thereafter, concentration decreased became minimal (68.9±11.5) 3 h before sunrise. (pmol between 16:00 when a peak value reached (1204.0±55.5). levels after onset (242.8±37.0). displayed no significant changes. Linear regression analysis indicated negative correlation for five collecting times daily 24 cycle freshwater water fish. similar occurred group group. To elucidate character Mel-AVT relationships further studies are required.
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