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Comparison of short‐and long‐term sexual reproduction tests with the marine red alga champia parvula
Author(s) -
Thursby Glen B.,
Steele Richard L.
Publication year - 1986
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 - 10.1002/etc.5620051109
Subject(s) - reproduction , sexual reproduction , biology , toxicology , cadmium , ecology , chemistry , organic chemistry
A 2‐d exposure test using the marine red alga Champia parvula was developed to assess the toxic effects of pollutants entering the marine and estuarine environments. The initial exposure was followed by a 5‐ to 7‐d recovery period to allow the development of any cystocarps (evidence of sexual reproduction, the endpoint measured). The 2‐d exposure test was validated by comparison with a previously developed 2‐weed tests in which “no sexual reproduction” was used as the reproductive endpoint. The 2‐d procedure is intended for use in testing both single compounds and complex effluents. Complex effluents, however, cannot be accurately tested with the 2‐week test; therefore, only single compounds were used to compare the two procedures. Nine single compounds were tested. Concentrations that resulted in a 95% or greater decrease from the control response with the 2‐d exposure were considered the best estimate of the no sexual reproduction response from the 2‐week test. All of the single compounds tested, except cadmium, yielded essentially the same results with both tests.