Borrell A, Cantos G, Pastor T, Aguilar A
Department of Animal Biology, Parc Científic de Barcelona, GRUMM, University of Barcelona, c/Baldiri i Reixac 4-6, Barcelona 08071, Spain.
Chemosphere. 2004 Feb;54(5):669-77. doi: 10.1016/j.chemosphere.2003.09.011.
Blubber and skin samples from 63 spotted dolphins (Stenella attenuata) (18 males, 40 females and 5 of unknown sex) were collected by biopsy techniques in the waters of the Coiba archipelago. Blubber was analyzed for organochlorine compounds and skin for gender determination. Mean levels of HCB (hexachlorobenzene), tPCB (polychlorinated biphenyls) and tDDT (dichlorodiphenyltrichloroethane) were 0.064, 2.30 and 6.4 mgkg(-1), respectively. These levels are low and are not considered to represent a threat to the S. attenuata population. No significant differences either in concentrations of HCB, tPCB and tDDT or in PCB profiles were observed between males and females. The ratio tDDT/tPCB was 2.69, indicating predominantly agrarian versus industrial activities in the area. The ratio ppDDE/tDDT was 0.83, a high figure that suggests both a local reduction of DDT inputs and a high rate of DDT degradation. Significant quantitative and qualitative differences were observed between two schools, suggesting intra-population heterogeneity in organochlorine exposure possibly due to demographic segregation.
通过活检技术在科伊瓦群岛海域采集了63头斑点海豚（细斑原海豚）的鲸脂和皮肤样本（18头雄性、40头雌性以及5头性别未知）。对鲸脂进行有机氯化合物分析，对皮肤进行性别鉴定。六氯苯（HCB）、多氯联苯（tPCB）和滴滴涕（tDDT）的平均含量分别为0.064、2.30和6.4毫克/千克。这些含量较低，不被认为对细斑原海豚种群构成威胁。在雄性和雌性之间，未观察到HCB、tPCB和tDDT的浓度或多氯联苯谱存在显著差异。tDDT/tPCB的比值为2.69，表明该地区主要是农业活动而非工业活动。ppDDE/tDDT的比值为0.83，这一高数值表明当地滴滴涕输入量减少且滴滴涕降解率较高。在两个群体之间观察到了显著的数量和质量差异，这表明有机氯暴露的种群内异质性可能是由于种群隔离所致。
