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Evaluation of Tannic Acid for Disinfection of Rainbow Trout Eggs
Author(s) -
Wagner Eric J.,
Oplinger Randall W.,
Bartley Matthew
Publication year - 2012
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1080/15222055.2011.649393
Subject(s) - tannic acid , rainbow trout , biology , disinfectant , iodine , zoology , food science , chemistry , botany , fish <actinopterygii> , fishery , organic chemistry
Because of its bactericidal properties, tannic acid was evaluated as a potential egg disinfectant for rainbow trout Oncorhynchus mykiss . After water hardening, eggs were disinfected with tannic acid (2, 20, or 200 mg/L for 5 or 15 min) or with iodine (100 mg/L for 10 min; control). Hatch (83.7–93.4%) and deformity percentages (<0.8%) did not significantly differ among treatments. Bacteriological data indicated that the percentage of eggs with no bacteria was significantly higher from the iodine treatment (87%) than from the tannic acid treatments (29.2–50.0%). Therefore, we found that tannic acid was safe to use on rainbow trout eggs at concentrations of up to 200 mg/L for 15 min, but the control of bacteria was inferior to that provided by the standard iodine treatment.