Transactions of the Wisconsin Academy of Sciences, Arts, and Letters
In comparison to "pre-stress" levels, goldfish anesthetized with methylpentynol and "handled" showed a significant increase in serum glucose level one day after handling, and apparent continued effects for the next three days. Fish handled but not anesthetized, and control fish which were neither anesthetized nor handled did not exhibit similar changes.
Richard E. Spieler and Max Allen Nickerson. 1976. Effect of Handling and Methylpentynol Anaesthesia on Serum Glucose Levels in Goldfish, Carassius auratus Linnaeus .Transactions of the Wisconsin Academy of Sciences, Arts, and Letters : 234 -239. https://nsuworks.nova.edu/occ_facarticles/208.