title: [Acute toxicity effects of three red tide algae on Brachionus plicatilis].
abstract: Acute toxicity testing method was used to study effects of different density of Prorocentrum donghaiense, Heterosigma akashiwo and Alexandrium tamarense on mortality rates and population growth parameter of Brachionus plicatilis under controlled experimental conditions. Results showed that 24 h LC50 values of Prorocentrum donghaiense, Heterosigma akashiwo and Alexandrium tamarense treatment to mortality rate of Brachionus plicatilis were 3.56, 1.21 and 0.49 (x 10(4) cells/mL) respectively. Marked density effects were presented when three species of red tide microalga showed their toxicity to Brachionus plicatilis. There were significant inhibitory effects on Brachionus plicatilis when it was exposed to cells of Prorocentrum donghaiense at the concentration of 10(4) cells/mL, filtrate and cell contents of Heterosigma akashiwo at the concentration of 10(5) cells/mL, and cells, filtrate and cell contents of Alexandrium tamarense at the concentration of 10(3) cells/mL respectively. Inhibitory effects of three species of microalga on Brachionus plicatilis were enhanced with increasing of microalgal density.
authors.affiliation: College of Marine Life Science, Ocean University of China, Qingdao 266003, China. saz0908@126.com
authors.forename: Wen-Li
authors.initials: WL
authors.lastname: Zhou
authors.forename: Hui
authors.initials: H
authors.lastname: Xiao
authors.forename: You
authors.initials: Y
authors.lastname: Wang
authors.forename: Hong-Chang
authors.initials: HC
authors.lastname: Zhai
authors.forename: Xue-Xi
authors.initials: XX
authors.lastname: Tang
mesh_terms: D000818:Animals; D004141:Dinoflagellida / Q000145:classification* / Q000502:physiology*; D012403:Rotifera / Q000254:growth & development*; D023382:Toxicity Tests, Acute