The anaesthetic potency of benzocaine-hydrochloride in three freshwater fish species |
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| Authors: | J.T. Ferreira H.J. Schoonbee G.L. Smit |
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| Affiliation: | Research Unit for Fish Biology, Rand Afrikaans University, P.O. Box 524, Johannesburg, 2000 Republic of South Africa |
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| Abstract: | Anaesthesia was induced in the common carp, Cyprinus carpio, tiiapia, Oreochromis mossambicus and rainbow trout, Salmo gairdneri, at concentrations of 25; 50; 75 and 100 mg/1 of benzocaine-hydrochloride as well as neutralized benzocaine-hydrochloride at water temperatures of 15; 20 and 25 °C. The results obtained indicated intra-and interspecific differences in the susceptibility of fish to anaesthesia due to metabolic, chemoreceptive and temperature tolerance differences in and amongst the three species. |
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