The comparison of anesthetic potency and toxicity of 2-phenoxyethanol and 1-phenoxy-2-propanol for juvenile common carp
The aim of this study was to investigate anesthetic potency and acute toxicity of 2-phenoxyethanol (2PE) and 1-phenoxy-2-
propanol (PP) for common carp. During efficacy tests, individual phases of anesthesia and recovery, as well as behavior and survival
rates, were determined. As effective time for anesthesia and recovery, 3 and 10 min respectively were chosen. Determined efficient
concentrations were 600 mg L?1 for 2PE and 415 and 460 mg L
?1
for PP. Acute toxicity tests were performed according to OECD Norm
Acute Toxicity Tests for Fish No. 203. To establish the 96-h LC50
of PP and 2PE, juvenile carps were exposed to six different concentrations in three replicates. Control fish were exposed to substance-free water. Mortality of fish and water characteristics were measured every 8
h. Determined 96-h LC
50
values of 2PE and PP were 327.9 mg L?1
and 304.2 mg L?1
, respectively. Results obtained during experiments
proved that both 2PE and PP have good efficacy and can be classified as relatively harmless for fish. This suggests that both 2PE and PP
can be used as safe anesthetics for common carp. However, similar anesthesia time together with extended recovery time suggest PP as
a potentially better anesthetic for aquatic organisms.
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