Ecotoxicology Research Group, School of Science, Royal Melbourne Institute of Technology, Bundoora, VIC 3083, Australia; Marine Mammal Foundation, PO Box 2046, Hampton East, VIC 3188, Australia.
Marine Mammal Foundation, PO Box 2046, Hampton East, VIC 3188, Australia.
Mar Pollut Bull. 2024 Dec;209(Pt A):117130. doi: 10.1016/j.marpolbul.2024.117130. Epub 2024 Oct 25.
Concentrations of nine trace elements (As, Cd, Cr, Cu, Hg, Mn, Ni, Se, Zn) in hepatic, renal and epidermal tissues were investigated in three dolphin species (Burrunan dolphin, Tursiops australis; common bottlenose dolphin, T. truncatus; short-beaked common dolphin, Delphinus delphis) within southeast Australia. Elevated hepatic Hg was found in critically endangered Burrunan dolphins (62.5-4990 mg/kg dw) and common bottlenose dolphins (102-1770 mg/kg dw), amongst the highest for the taxa globally, exceeding the short-beaked common dolphins (3.24-370 mg/kg dw), likely due to dietary differences. Hepatic Hg:Se molar ratios exceeded 1 in 60 % of dolphins, suggesting Hg toxicity. Essential trace elements showed little variation across species, but epidermal Se was notably low in Burrunan dolphins. Due to ongoing freshwater skin disease/health concerns, and the importance Se plays in epidermal health, it is recommended that epidermal Se and skin health are further investigated within the Burrunan dolphin.
在澳大利亚东南部的三种海豚物种（湾海豚、宽吻海豚和短吻海豚）中，研究了肝脏、肾脏和表皮组织中的九种微量元素（砷、镉、铬、铜、汞、锰、镍、硒、锌）的浓度。极度濒危的湾海豚（62.5-4990mg/kg dw）和宽吻海豚（102-1770mg/kg dw）的肝脏汞含量升高，这在全球范围内是该类群中最高的，超过了短吻海豚（3.24-370mg/kg dw），这可能是由于饮食差异。60%的海豚的肝脏 Hg:Se 摩尔比超过 1，表明存在汞毒性。必需微量元素在物种间变化不大，但湾海豚的表皮硒含量明显较低。由于持续存在淡水皮肤疾病/健康问题，以及硒在表皮健康中的重要作用，建议进一步研究湾海豚的表皮硒和皮肤健康。
