Open AccessAcute toxicity of 4 algal toxins on 5 common fishes of the pearl river estuary
Author(s) -
Wei Guo,
Ruming Jiang,
Jie Li,
Zhipeng Ma,
Xinfeng Zhang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/467/1/012131
Subject(s) - estuary , toxicity , acute toxicity , biology , toxin , fish kill , anabaena , pearl , marine toxin , cyanobacteria , toxicology , algal bloom , fishery , ecology , chemistry , microbiology and biotechnology , phytoplankton , bacteria , philosophy , genetics , theology , organic chemistry , nutrient
This study studied the common economic fish in the Pearl River Estuary, including Konosirus punctatus, Hypophthalmichthys nobilis, Oreochromis spp, dace and Carassius auratus. We evaluated the toxic effects using hydrostatic toxicity. The method is to expose the test organism to different concentrations of algal toxin, and obtain the LC50 by using the probability unit method. The results showed that the same algal toxin had significant differences in toxicity to five species of fish. 96h-LC50 of Anabaena-a toxins on 5 common fishes. is 38.1μg/L, 45.6μg/L, 68.2μg/L, 78.2 μg/L, 64.5 μg/L; MC-LR is 66.9μg/L, 226.8μg/L, 255.4μg/L, 317.5 μg/L, 184.3 μg/L; MC-RR is 91.2μg/L, 266μg/L, 285μg/L, 337.6 μg/L, 214.8 μg/L; MC-YR is 95μg/L, 299μg/L, 505μg/L, 709μg/L, 439 μg/L. Anabaena-a toxins is the most toxic to the test organism, while MC-YR is the weakest. The toxicity of different algal toxins is different for the tested organisms. In this study, we found that the toxicity of the four algal toxins was from strong to weak: Anabaena-a toxins>MC-LR>MC-RR>MC-YR, this research results can provide reference and basic data support for the water environment quality and water supply safety in Dawan District and Pearl River Estuary.