Kleinkauf Anne, Scott Alexander P, Stewart Christie, Simpson Michael G, Leah Richard T
School of Biological Sciences, University of Liverpool, Jones Building, Liverpool L69 3GS, UK.
Ecotoxicol Environ Saf. 2004 Jul;58(3):356-64. doi: 10.1016/j.ecoenv.2004.03.009.
Vitellogenin (VTG) plasma concentrations were measured in flounder (Platicthys flesus L.) caught in two neighbouring UK estuaries between autumn 1997 and summer 2000. As found in previous studies, male and immature female flounder that were caught in the Mersey, but not in the Dee, had abnormally elevated concentrations of VTG in their plasma-evidence of the presence of natural and synthetic estrogens and/or xenoestrogens in the Mersey. The present study reveals a marked seasonal cycle in VTG concentrations in males. In late spring and summer, male flounder in the Mersey have relatively low concentrations of VTG (microg mL(-1) range). However, in mid-winter, mean concentrations were as high as 5 mg mL(-1). There is also evidence that there was a lessening in the degree of estrogenic endocrine disruption between 1996-1997 (the period of the initial studies on the Mersey) and 1998-2000 (the period covered by the present study). Only 0.5% of the fish contained ovotestes (intersex condition).
1997年秋季至2000年夏季期间，对在英国两个相邻河口捕获的比目鱼（欧洲黄盖鲽）的血浆卵黄蛋白原（VTG）浓度进行了测定。正如之前的研究所发现的那样，在默西河捕获的雄性和未成熟雌性比目鱼血浆中的VTG浓度异常升高，而在迪河中捕获的则没有，这证明默西河中存在天然和合成雌激素及/或外源性雌激素。本研究揭示了雄性比目鱼VTG浓度存在明显的季节性周期。在晚春和夏季，默西河中的雄性比目鱼VTG浓度相对较低（微克/毫升范围）。然而，在冬季中期，平均浓度高达5毫克/毫升。还有证据表明，在1996 - 1997年（对默西河进行初步研究的时期）和1998 - 2000年（本研究涵盖的时期）之间，雌激素内分泌干扰程度有所减轻。只有0.5%的鱼含有卵睾（雌雄同体状态）。
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