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Assessment of the freshwater annual fish Cynopoecilus melanotaenia as a toxicity test organism using three reference substances
Author(s) -
Arenzon Alexandre,
Pinto Régis Fontana,
Colombo Patrick,
RayaRodriguez Maria Teresa
Publication year - 2003
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1897/02-292
Subject(s) - toxicity , organism , acute toxicity , fish <actinopterygii> , sodium , toxicology , bioassay , sulfate , biology , copper sulfate , chemistry , environmental chemistry , copper , ecology , fishery , paleontology , organic chemistry
This study presents a preliminary evaluation of the use of the Brazilian fish Cynopoecilus melanotaenia as a test organism in toxicity tests. The cryptobiotic stage presented by the eggs of fish C. melanotaenia can overcome the difficulty of continuously keeping cultures and recruiting healthy animals in sufficient numbers to be used in toxicity tests. In order to determine the applicability of this species as a test organism, three different reference substances were evaluated in 96‐h acute toxicity tests: Copper sulfate (CuSO 4 ·5H 2 O), sodium dodecil sulfate (C 12 H 25 NaO 4 S), and sodium chloride (NaCl). Sensitivity ranged as follows: copper sulfate (0.05‐0.13 mg/L), sodium dodecil sulfate (10.7‐19.0 mg/L), and sodium chloride (1.44‐1.96 g/L). We conclude that C. melanotaenia shows potential as a test organism in toxicity tests; however, further research should be conducted with other substances and should be compared with the research on other species before we can reach more conclusive results.