Weijs Liesbeth, Briels Nathalie, Adams Douglas H, Lepoint Gilles, Das Krishna, Blust Ronny, Covaci Adrian
Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium; Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; National Research Centre for Environmental Toxicology (Entox), The University of Queensland, 39 Kessels Road, Coopers Plains, QLD 4108, Australia.
Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium; Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; Norwegian University of Science and Technology (NTNU), Department of Biology, Høgskoleringen 5, Realfagbygget, 7491 Trondheim, Norway.
Mar Pollut Bull. 2015 Mar 15;92(1-2):59-68. doi: 10.1016/j.marpolbul.2014.12.056. Epub 2015 Jan 13.
Elasmobranchs can bioaccumulate considerable amounts of persistent organic pollutants (POPs) and utilize several reproductive strategies thereby influencing maternal transfer of contaminants. This study provides preliminary data on the POP transfer from pregnant females to offspring of three species (Atlantic stingrays, bonnethead, blacktip sharks) with different reproduction modes (aplacental, placental viviparity). Polychlorinated biphenyl (PCB) levels were generally higher than any other POPs. Stingrays and blacktip shark embryos contained the lowest POP concentrations while bonnetheads and the blacktip adult female had the highest concentrations. Results suggest that POPs are more readily transferred from the mother to the embryo compared to what is transferred to ova in stingrays. Statistically significant differences in levels of selected POPs were found between embryos from the left and right uterus within the same litter as well as between female and male embryos within the same litter for bonnetheads, but not for the blacktip sharks.
软骨鱼类能够生物累积大量的持久性有机污染物（POPs），并采用多种繁殖策略，从而影响污染物的母体转移。本研究提供了关于三种具有不同繁殖模式（非胎盘、胎盘胎生）的物种（大西洋黄貂鱼、圆头鲨、黑鳍鲨）从怀孕雌性到后代的持久性有机污染物转移的初步数据。多氯联苯（PCB）水平通常高于任何其他持久性有机污染物。黄貂鱼和黑鳍鲨胚胎中的持久性有机污染物浓度最低，而圆头鲨和黑鳍成年雌性中的浓度最高。结果表明，与黄貂鱼中转移到卵子中的情况相比，持久性有机污染物更容易从母体转移到胚胎中。在同一窝中，圆头鲨的左右子宫内的胚胎之间以及同一窝中的雌性和雄性胚胎之间，选定持久性有机污染物的水平存在统计学上的显著差异，但黑鳍鲨不存在这种差异。
