Carballo Matilde, Aguayo Sonia, de la Torre Ana, Muñoz M Jesús
Animal Health Research Center, CISA-INIA, Valdeolmos, 28130 Madrid, Spain.
Sci Total Environ. 2005 Apr 1;341(1-3):71-9. doi: 10.1016/j.scitotenv.2004.08.021. Epub 2004 Nov 18.
A field study was carried out in order to assess, in a wild cyprinid fish, the biological effects related to the exposure to estrogenic compounds. The gonadosomic index (GSI), plasma vitellogenin (VTG) level and histological observations of gonads were performed to evaluate the reproductive health in common carp (Cyprinus carpio) from three rivers receiving sewage treatment plant (STP) effluents (Guadarrama, Henares and Jarama rivers, Spain) and from a reference site (Lozoya river). No significative differences in male GSI between sites were described. Only in the 18% of fish from Guadarrama river were elevated plasma VTG levels detected. The presence of oocytes in the testis was not found in any of males examined. The results suggest that the released estrogenic compounds by STPs effluents are not enough capable to adversely affect the gonadal development of the fish studied. Additional studies will be required to assess the risk of estrogenic compounds on fish from other sites of this area.
为了评估野生鲤科鱼类接触雌激素化合物的生物效应，开展了一项野外研究。对性腺指数（GSI）、血浆卵黄蛋白原（VTG）水平以及性腺进行组织学观察，以评估来自三条接纳污水处理厂（STP）废水的河流（西班牙的瓜达拉马河、埃纳雷斯河和哈拉马河）以及一个对照点（洛索亚河）的鲤鱼（Cyprinus carpio）的生殖健康状况。各地点之间雄性GSI未发现显著差异。仅在瓜达拉马河18%的鱼类中检测到血浆VTG水平升高。在所检查的任何雄性中均未发现睾丸中有卵母细胞。结果表明，污水处理厂排放的雌激素化合物不足以对所研究鱼类的性腺发育产生不利影响。需要进一步研究以评估该地区其他地点雌激素化合物对鱼类的风险。
