Méndez Nuria, Barata Carlos
Laboratorio de Invertebrados Bentónicos. Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apdo. Postal 811, 82000, Mazatlán, Sinaloa, Mexico,
Ecotoxicology. 2015 Jan;24(1):106-18. doi: 10.1007/s10646-014-1362-z. Epub 2014 Oct 31.
The cosmopolitan species-complex Capitella, a deposit-feeding polychaete, is widely used as an indicator of organic pollution and plays an important role in sewage waste cycling in marine and estuarine ecosystems. The antidepressant fluoxetine can be accumulated in sewage effluents and it could pose a hazard to infauna inhabiting surrounding areas. The study aimed to assess effects of fluoxetine on juveniles and adults of Capitella teleta and Capitella sp A. Sediments were spiked with four fluoxetine concentrations (0.001, 0.03, 0.3 and 3.3 µg/g dry wt. sediment). Chronically exposed worms of C. teleta showed delay of maturity, delay or inhibition of copulation and morphological abnormalities (genital spines in males and juveniles) with adverse physiological consequences. Alternatively, in C. teleta fluoxetine enhanced proteroginous individuals that may be beneficial for the population. Worms of Capitella sp A only showed delay or inhibition of copulation. Observed fluoxetine adverse effects could have important ecological implications in natural populations of aquatic invertebrates due to the possible alteration or even inhibition of reproductive processes.
世界性物种复合体小头虫属（Capitella）是一种沉积食性多毛纲动物，被广泛用作有机污染的指示生物，在海洋和河口生态系统的污水废物循环中发挥着重要作用。抗抑郁药氟西汀会在污水中积累，可能对栖息在周边地区的底栖动物构成危害。本研究旨在评估氟西汀对小头虫（Capitella teleta）和小头虫A种（Capitella sp A）幼体及成体的影响。在沉积物中添加了四种氟西汀浓度（0.001、0.03、0.3和3.3微克/克干重沉积物）。长期暴露于氟西汀的小头虫表现出成熟延迟、交配延迟或抑制以及形态异常（雄性和幼体出现生殖刺），并产生了不良生理后果。另外，在小头虫中，氟西汀增加了早熟个体，这可能对种群有益。小头虫A种的蠕虫仅表现出交配延迟或抑制。观察到的氟西汀的不良影响可能会对水生无脊椎动物的自然种群产生重要的生态影响，因为生殖过程可能会改变甚至受到抑制。
