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Toxicity of a soluble peptide from Microcystis sp. to zooplankton and fish
Author(s) -
PEÑALOZA R.,
ROJAS M.,
VILA I.,
ZAMBRANO F.
Publication year - 1990
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1990.tb00705.x
Subject(s) - microcystis , zooplankton , biology , gambusia , copepod , phytoplankton , daphnia , microcystis aeruginosa , microcystin , daphnia magna , toxicity , cyanobacteria , cladocera , branchiopoda , fish kill , eutrophication , ecology , zoology , algal bloom , fish <actinopterygii> , crustacean , chemistry , fishery , nutrient , bacteria , genetics , organic chemistry
SUMMARY.1 A soluble cell fraction lethal to Daphnia magna was isolated by the disruption of net phytoplankton from eutrophic Aculeo Lake. The phytoplankton of this lake is dominated by Microcystis sp. 2 The soluble fraction was also lethal to common native zooplankton, including the rotifers Keratella sp., Trichocerca similis , the copepod Boeckella sp., and the cladoceran Chydorus sphaericus . In addition, a partially purified soluble component of the lethal fraction caused the death of the fish Gambusia affinis . 3 The specific toxicity of the soluble fraction from phytoptankton varied four‐ to six‐fold seasonally with peaks during periods of warm temperature. 4 Our results suggest that releases of a toxic peptide from Microcystis sp. may be the cause of massive fish kills at the study site, Aculeo Lake.