Organochlorine concentrations in bonnethead sharks (Sphyrna tiburo) from four Florida estuaries
Organochlorine concentrations in bonnethead sharks (Sphyrna tiburo) from four Florida estuaries
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DOI：
10.1007/s00244-003-0275-2
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发表时间：
2005-05-01
影响因子：
4
通讯作者：
Lombardi-Carlson, L
中科院分区：
文献类型：
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作者：
Gelsleichter, J;Manire, CA;Lombardi-Carlson, L
由于有机氯污染物在水生环境中具有持久性，并能够损害生殖和其他重要的生理过程，因此对海洋生物构成重大的健康风险。尽管存在这些担忧，但很少有研究调查鲨鱼体内的OC暴露水平，鲨鱼是特别受海洋污染威胁的鱼类，因为它们倾向于生物积累和生物放大环境污染物。本研究探讨了29 OC农药和总多氯联苯（PCBs）的浓度在圆头鲨（Sphyrna tiburo），一个丰富的物种，已观察到的证据，在某些佛罗里达人口的生殖障碍。采用气相色谱-质谱联用技术检测了95只猪肝脏中PCBs和22种OC农药的含量。在佛罗里达的墨西哥湾沿岸的四个河口：阿巴拉契科拉湾，坦帕湾，佛罗里达湾和夏洛特港。总的来说，阿巴拉契科拉湾、坦帕湾和夏洛特港S的OC浓度显著较高。与佛罗里达湾人口有关的tiburo。因为坦帕湾的不孕率明显高于佛罗里达湾。然而，目前的研究结果暗示OC暴露与生殖健康之间可能存在关系，需要进一步调查。农药和多氯联苯浓度似乎没有显着增加与增长或年龄在S。tiburo。这表明，与有污染物数据的其他鲨鱼相比，该物种的有机碳生物累积潜力有限。血清和肌肉中的OC浓度与肝脏中的浓度不相关，表明这些组织是通过非致死性采样程序测量该物种内部OC负荷的不良替代品。
Because of their persistence in aquatic environments and ability to impair reproduction and other critical physiological processes, organochlorine (OC) contaminants pose significant health risks to marine organisms. Despite such concerns, few studies have investigated levels of OC exposure in sharks, which are fish particularly threatened by anthropoacnic pollution because of their tendency to bioaccumulate and biomagnify environmental contaminants. The present study examined concentrations of 29 OC pesticides and total polychlorinated biphenyls (PCBs) in the bonnethead shark (Sphyrna tiburo), an abundant species for which evidence of reproductive impairment has been observed in certain Florida populations. Quantifiable levels of PCBs and 22 OC pesticides were detected via gas chromatography and mass spectrometry in liver of 95 S. tiburo from four estuaries on Florida's Gulf coast: Apalachicola Bay, Tampa Bay, Florida Bay, and Charlotte Harbor. In general, OC concentrations were significantly higher in Apalachicola Bay, Tampa Bay, and Charlotte Harbor S. tiburo in relation to the Florida Bay population. Because the rate of infertility has been shown to be dramatically higher in Tampa Bay versus Florida Bay S. tiburo, the present findings allude to a possible relationship between OC exposure and reproductive health that requires further investigation. Pesticide and PCB concentrations did not appear to significantly increase with growth or age in S. tiburo. suggesting limited potential for OC bioaccumulation in this species compared with other sharks for which contaminant data are available. Concentrations of OCs in serum and muscle were not correlated with those in liver, indicating that these tissues are poor surrogates for measuring internal OC burden in this species via nonlethal sampling procedures.