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OJVRTM
Online Journal of
Veterinary Research©
Volume 10
(1):31-41, 2006. Redacted 2018.
Toxicity and efficacy of
lidocaine as an anesthetic for Nile tilapia; Oreochromis
niloticus.
Abbas HHH, Abdel-Gawad AS, Akkr,
AA.
Hydrobiology
Department, Veterinary Research Division, National Research Center, El-Bohooth St. Dokki, Giza, Cairo,
Egypt.
ABSTRACT
Abbas
HHH, Abdel-Gawad, AS, Akkr,
AA Toxicity and efficacy of lidocaine as an
anesthetic for Nile tilapia; Oreochromis niloticus Onl J Vet Res., 10 (1) : 31 -41,
2006. The
anesthetic lidocaine was tested for toxicity, efficacy and safety on Nile
tilapia (Oreochromis niloticus).
Toxicity values were variable and depended mainly on concentration and time of
exposure. Concentrations of 60, 80 and 100 mg/l lidocaine were all effective
for rapid anesthesia with 100% survival. In moderately rapid anesthesia, 40
mg/l lidocaine induced loss of equilibrium in Nile tilapia within 20 min
exposure and 100% survival. Safety index (SI) values for lidocaine on Nile
tilapia indicated that the shorter the exposure time, the higher SI values.
Repeated anesthesia in freshly prepared solution of lidocaine did not appear to
affect on Nile tilapia sensitivity in terms of
anesthetization, recovery and survival. However, results were in contrast and
variable when previously prepared (old) solutions of lidocaine were used.
Key words: Nile tilapia,
anesthesia, toxicity, efficacy.
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