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Species Sensitivity Distributions - Aquatic

Single Surrogate SSD

Pick your Surrogate Enter Toxicity (μg/L)
Fathead minnow (Pimephales promelas)
Sheepshead minnow (Cyprinodon variegatus)
Bluegill (Lepomis macrochirus)
Channel catfish (Ictalurus punctatus)
Rainbow trout (Oncorhynchus mykiss)


If toxicity data for a chemical is available for both a vertebrate and an invertebrate species, SSDs can be improved by using two surrogates. The two surrogate SSD uses the vertebrate surrogate to estimate toxicity to all vertebrate species and the invertebrate surrogate to estimate toxicity to all invertebrate species. Data generated from both surrogates are combined to create one SSD. See the user manual for more on this method.

Two Surrogate SSD

Pick your vertebrate Surrogate Enter Toxicity (μg/L)
Fathead minnow (Pimephales promelas)
Sheepshead minnow (Cyprinodon variegatus)
Bluegill (Lepomis macrochirus)
Channel catfish (Ictalurus punctatus)
Rainbow trout (Oncorhynchus mykiss)
Pick your invertebrate Surrogate Enter Toxicity (μg/L)
Daphnid (Daphnia magna)
Mysid (Americamysis bahia)


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Office of Research and Development | National Health and Environmental Effects Research Laboratory | Gulf Ecology Division


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