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Effects of Selected Water Quality Variables on the Persistence of Tannic Acid and Related Compounds under Simulated Aquaculture Conditions
Author(s) -
Zhao Guojing,
Jaiteh Ahmadu A.,
Wang Wenxian,
Stevens S. Edward
Publication year - 1999
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 - 10.1577/1548-8454(1999)061<0304:eoswqv>2.0.co;2
Subject(s) - tannic acid , tannin , alkalinity , propyl gallate , aquaculture , gallic acid , fish farming , water quality , nutrient , food science , biology , environmental chemistry , chemistry , fish <actinopterygii> , ecology , botany , biochemistry , antioxidant , organic chemistry , fishery
Tannins have potential commercial applications in aquaculture for the prevention of piscine diseases and off‐flavor in fish. Selected water quality variables, such as temperature, pH, dissolved oxygen, light intensity, total hardness and total alkalinity, and available nutrients found in fish ponds were examined for their influence on the fate of gallic acid, methyl gallate, propyl gallate, and tannic acid. It was determined that total hardness and alkalinity were the most effective factors in the dissipation of tannin compounds. High levels of selected water quality variables were significantly different from low levels in their ability to transform tannin compounds. It was also found that natural suspended solids were effective in precipitating 60% of the methyl gallate and 81.3% of the propyl gallate per week from solution. Abiotic processes, such as physical transportation and chemical transformation, affected the fate of tannin compounds in a simulated fish pond. This study may guide the use of tannins as a feed additive or disease treatment in the management of fish‐farming problems.