Varó I, Taylor A C, Ferrando M D, Amat F
Instituto de Acuicultura de Torre de la Sal C.S.I.C, Castellón, Spain.
J Environ Sci Health B. 1997 May;32(3):363-75. doi: 10.1080/03601239709373092.
This study was carried out to investigate the acute toxicity of endosulfan, an organochlorine pesticide, and the effect of a sub-lethal concentration of this compound on the rate of oxygen consumption (MO2) of three different Spanish strains of Artemia neuplii. The 24 h LC50 values showed that the nauplii of the parthenogenetic diploid strain were more resistant, whereas those of the parthenogenetic tetraploid and bisexual strains were more sensitive to endosulfan and did not show differences between them. The results suggest that the use of different Artemia strains, with their differing degree of sensitivity to the same toxicant, may be a valuable tool in aquatic ecotoxicological research. Exposure to sub-lethal concentrations (1/5-24hLC50) of endosulfan had no significant effect on the oxygen consumption rates (MO2) of each strain of the nauplii. Nevertheless, a reduction in the ability of the nauplii to maintain respiratory independence during hypoxia, after 24 h exposure to such dose, was observed.
本研究旨在调查有机氯农药硫丹的急性毒性，以及该化合物的亚致死浓度对三种不同西班牙卤虫无节幼体品系耗氧率（MO2）的影响。24小时半数致死浓度（LC50）值表明，孤雌生殖二倍体品系的无节幼体更具抗性，而孤雌生殖四倍体品系和两性品系的无节幼体对硫丹更敏感，且二者之间无差异。结果表明，使用对同一毒物具有不同敏感程度的不同卤虫品系，可能是水生生态毒理学研究中的一种有价值的工具。暴露于硫丹的亚致死浓度（1/5 - 24小时LC50）对各无节幼体品系的耗氧率（MO2）没有显著影响。然而，在暴露于该剂量24小时后，观察到无节幼体在缺氧期间维持呼吸独立性的能力有所下降。
