Seasonal variations in the condition, biochemical composition, and reproduction of Ruditapes philippinarum were investigated from August 2009 to October 2010, 18 months after the Hebei Spirit oil spill off Malipo Beach on the west coast of Korea. No significant differences in physical and nutritional conditions were found between the oil-damaged and the undamaged control beaches. At the undamaged Mongsanpo Beach, all the biometric components (dry tissue weights and biochemical components) remained at low levels during autumn–winter but increased rapidly through spring, followed by a dramatic drop in August. In contrast, at the oil-damaged beach, no clear seasonal fluctuations were detected in the biometric components during the study period. Absolute values of all the components were much higher at the control than at the damaged site. This lack of energy reserves in the clams in the damaged area likely resulted in a failure of gametogenic development. Gonadal maturity index peaked in summer at both beaches. However, the gross egg weight was much higher at the control than at the damaged site during June–July. In addition, its different peak timing between sites indicated a month’s lag in the major spawning pulse at the oil-damaged beach. The spatial variations in all the biometric components of the clams observed in this study clearly implied that the Hebei Spirit oil spill may interfere with the clam phenology at Malipo Beach within 2 to 3 years after the incident.

中文翻译：

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河北精神溢油对朝鲜西海岸马尼拉蛤仔菲律宾蛤的状况，繁殖和储能循环的影响

菲律宾蛤仔的状况，生化成分和繁殖的季节性变化自2009年8月至2010年10月，即河北精神石油泄漏事件发生在韩国西海岸的马利波海滩（Malipo Beach）泄漏事件发生18个月后，对这些管道进行了调查。在受油污的海滩和未受破坏的对照海滩之间，在物理和营养条件上没有发现显着差异。在完好的蒙山坡海滩，秋冬季所有生物成分（干重和生化成分）均处于较低水平，但直到春季迅速增加，随后在八月份急剧下降。相反，在受油污破坏的海滩上，在研究期间未发现生物特征中明显的季节性波动。对照中所有组分的绝对值均高于受损部位。受损区域的蛤lam缺乏这种能量储备，很可能导致配子发育失败。两海滩的性腺成熟度指数均在夏季达到峰值。但是，在6月至7月期间，对照组的总蛋重比受损部位高得多。此外，站点之间的高峰时间有所不同，这表明受油污的海滩的主要产卵脉动滞后了一个月。这项研究中观察到的蛤的所有生物特征成分的空间变化清楚地表明，河北精神溢油事故可能在事故发生后的2至3年内干扰马利波海滩的蛤物候。