Abstract：We performed waterborne exposures of several chemicals on adult and embryo-larvae stage rare minnow and compared the sensitivity between the wild group (WG) and closed colony (IHB). Adult rare minnows were acutely exposed to lethal concentrations of the chemical agents (K2Cr2O4, pentachlorophenol, HgCl2, p-Chloroaniline and CdCl2) in order to determine the 96 h LC50 (96 h lethal median concentration). For the closed colony, the 96h LC50was 69.0mg/L, 111.4, 56.9 μg/L, 35.5and12.2mg/L for Cr6+, pentachlorophenol, Hg2+, p-Chloroaniline and Cd2+, respectively. For the wild colony, the 96h LC50was 99.8mg/L, 105.6and 65.8 μg/L for Cr6+, pentachlorophenol, Hg2+, respectively. A significant difference was observed in the exposure to K2Cr2O4between the two colonies (P<0.05). Then the embryos (8hours post-fertilization) and larvae (1day post-hatching) from closed colony were exposed to p-Chloroaniline and CdCl2for 7days and the exposure caused toxic effects on hatching, malformation, survival and growth, and among these, growth was the most sensitive parameter to the toxicants stress. For p-Chloroaniline, the obtained none-observable effect concentration (NOEC) for growth were 2and 4mg/L in the embryos and larvae, respectively; while for CdCl2, the NOEC was 0.1mg/L in both the embryos and larvae. Our results suggested that the closed colony rare minnow is sensitive to chemical exposure and can serve as a reliable model organism for testing chemical toxicity.
吴本丽, 曹岩, 罗思, 王剑伟. 封闭群稀有鮈鲫对几种常见化学品的敏感性[J]. 中国环境科学, 2014, 34(4): 1059-1066.
WU Ben-Li, CAO Yan, LUO Si, WANG Jian-Wei. Sensitivity of rare minnow (Gobiocypris rarus, IHB) to several common chemicals. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(4): 1059-1066.
