Tornero Victoria, Borrell Assumpció, Aguilar Alex, Forcada Jaume, Lockyer Christina
Department of Animal Biology, Vertebrates, Faculty of Biology, University of Barcelona, Diagonal 645, 08071 Barcelona, Spain.
Environ Pollut. 2006 Mar;140(2):312-21. doi: 10.1016/j.envpol.2005.07.006. Epub 2005 Nov 2.
The effect of age, sex, nutritive condition and organochlorine concentration on blubber retinoid concentrations was examined in 74 common dolphins incidentally caught off northwestern Spain. Age and blubber lipid content were strong determinants of the retinoid concentrations in males, while these variables did not account for the variation found in females. Retinoids were positively correlated with organochlorines in males and negatively in females. However, pollution levels were moderate and likely to be below threshold levels above that a toxicological response is to be expected. Thus, a cause-effect relationship between organochlorine and retinoid concentrations could not be properly established, and the observed correlation may be the result of an independent association of the two variables with age. Further research on the influence of the best predictor variables on retinoid dynamics is required to implement the use of retinoids as biomarkers of pollutant exposure in cetaceans.
在西班牙西北部偶然捕获的74头普通海豚中，研究了年龄、性别、营养状况和有机氯浓度对鲸脂类视黄醇浓度的影响。年龄和鲸脂脂质含量是雄性视黄醇浓度的重要决定因素，而这些变量并不能解释雌性视黄醇浓度的变化。视黄醇在雄性中与有机氯呈正相关，在雌性中呈负相关。然而，污染水平适中，可能低于预期产生毒理学反应的阈值水平。因此，无法正确建立有机氯与视黄醇浓度之间的因果关系，观察到的相关性可能是这两个变量与年龄独立关联的结果。需要进一步研究最佳预测变量对视黄醇动态的影响，以将视黄醇用作鲸类动物污染物暴露生物标志物。
