The biology of ostracod crustaceans suggests that this group could be a useful model for sediment toxicity testing. We examined life history characteristics of the freshwater ostracod Cyprinotus incongruens in the laboratory (25°C), then used length after 10 days as a response variable in a sediment toxicity test. Life history results indicated that both fecundity (0–64 total eggs per female), and egg development time (1->157 days), were highly variable. In contrast, juvenile development time showed less variation (7–16 days), and thus body length after 10 days was chosen as a sublethal bioassay character. A bioassay experiment using sediments isolated from mine-impacted cobble streams indicated that C. incongruens had a higher sensitivity to variation in sediment quality than the cladoceran Ceriodaphnia dubia. Surprisingly, the results indicated no correspondence between concentration of metals and toxicity in either C. incongruens or C. dubia. Overall our results indicate that ostracods are a good candidate taxon for sublethal toxicity tests of contaminated sediments.
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Havel, J.E., Talbott, B.L. Life history characteristics of the freshwater ostracod Cyprinotus incongruens and their application to toxicity testing. Ecotoxicology 4, 206–218 (1995). https://doi.org/10.1007/BF00116482
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DOI: https://doi.org/10.1007/BF00116482