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In the aquaculture procedures, the fishes are easily stressed in differetn rearing phases. So, is important the use of anesthetics for to prevent physical injuries and promote metabolism decrease, resulting in improved welfare for fish. The aim of this study was analyze the anesthetical induction of Hungarian carp fingerlings (Cyprinus Carpio) displayed of the different dosages of eugenol (20, 30, 40 and 50mg/L), ketamine (300, 600, 900 and 1200mg/L), xylazine (800, 1100, 2000mg/L) and the ketamine/xylazine association (300/300, 600/600, 900/900 and 1200/1200mg/L). Each dosage was tested for ten fish, individually subjected to the anesthetic bath with container containing 1 liter of water. All experimental procedures were the same as in the tests. After, it was analyzed the anesthetic time (TA) and the recovery time (TR). The anesthetics eugenol, ketamine and the ketamine/xylazine association allowed the deep anesthesia, but xilazine didn’t allow it. Among the anesthetics tested, eugenol at 50mg/L demonstrated better anesthetic induction and recovery time for carp juveniles.

Produtos anestésicos para juvenis de carpa húngara ("Cyprinus carpio")