Sarabia Raquel, Del Ramo Jose, Díaz-Mayans Javier, Torreblanca Amparo
Department of Functional Biology and Physical Anthropology, Faculty of Biological Sciences, University of Valencia, Valencia, Spain.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2003 Jun;38(6):1065-71. doi: 10.1081/ese-120019864.
Hatching, reproductive, and lifespan characteristics of an Artemia parthenogenetica population from La Mata (Alicante, Spain) exposed to cadmium were studied. No effects on percentage of cyst hatched nor time of hatching were observed on cysts exposed from 0.01 to 5 mg Cd/L. Cohorts of Artemia were chronically exposed to cadmium in life-table experiments to test whether ecologically relevant impacts may occur after several generations of exposure to a very low concentration of cadmium. Chronic toxicity tests were performed using neonates of a third generation of shrimps exposed to 0.08 mg Cd/L (1/1000 of the LOEC for 24 h acute toxicity test). No significant reduction in the intrinsic rate of natural increase (rm) was found as a result of cadmium exposure, although the age-specific fecundities of the cadmium exposed shrimps were lower than those of the controls. A significant decrease in the prereproductive period and a reduction in the percentage of fertile females was also found as a consequence of the metal exposure.
研究了来自西班牙阿利坎特市拉马塔的孤雌生殖卤虫种群在镉暴露情况下的孵化、繁殖及寿命特征。对于暴露于0.01至5毫克镉/升的卤虫卵，未观察到对孵化率和孵化时间百分比的影响。在生命表实验中，卤虫群体被长期暴露于镉中，以测试在几代暴露于极低浓度镉之后是否会出现生态相关影响。使用第三代虾的幼体进行慢性毒性试验，使其暴露于0.08毫克镉/升（24小时急性毒性试验的最低观察效应浓度的千分之一）。尽管暴露于镉的虾的特定年龄繁殖力低于对照组，但未发现镉暴露导致自然增长率（rm）显著降低。金属暴露还导致生殖前期显著缩短以及可育雌虾百分比降低。
