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Evidence and patterns of maternal transfer of metals and trace elements in Western tiger snakes (Notechis scutatus occidentalis) – a pilot study
Austral Ecology ( IF 1.5 ) Pub Date : 2020-12-05 , DOI: 10.1111/aec.12985
Damian Christopher Lettoof 1 , James Urban Van Dyke 2 , Marthe Monique Gagnon 1
Affiliation  

Urban wildlife are regularly exposed to a variety of anthropogenic contaminants that have the potential to bioaccumulate in body tissues. As a consequence, developing embryos and offspring can be at risk from exposure to maternally accumulated contaminants, yet this has rarely been reported in reptiles. We opportunistically collected one pregnant Western tiger snake (Notechis scutatus occidentalis) from each of three wetlands with differing sediment metal contamination around Perth, and analysed maternal snake livers and three foetuses per litter for a suite of 17 elements representing either alkaline earth metals, transition metals or metalloids. We detected 14 elements, and compared their concentrations in maternal livers to foetus whole bodies to determine preliminary patterns of maternal transfer. Our results suggest antimony, arsenic, manganese, mercury, molybdenum and zinc are maternally transferred in Western tiger snakes. We urge further research to further quantify patterns of contaminant maternal transfer in viviparous snakes and determine their impacts on the development and health of contaminated offspring.

中文翻译:

母体中金属和微量元素在西部虎蛇中的转移的证据和模式(Notechis scutatus occidentalis)–一项初步研究

城市野生动植物定期接触各种可能在人体组织中生物蓄积的人为污染物。结果,发育中的胚胎和后代可能会受到母体积累的污染物的威胁,但是在爬行动物中很少有报道。我们机会性地收集了一只怀孕的西部虎蛇(Notechis scutatus occidentalis)从珀斯附近三个沉积物金属污染程度不同的湿地中的每一个开始,分析了每窝产妇的蛇肝和三个胎儿,获得了代表碱土金属,过渡金属或准金属的17种元素。我们检测了14种元素,并将它们在母体肝脏中与胎儿整个体内的浓度进行比较,以确定母体转移的初步模式。我们的结果表明,锑,砷,锰,汞,钼和锌在西部虎蛇中是母体转移的。我们敦促进一步研究,以进一步量化蛇卵母体中污染物母体转移的模式,并确定它们对受污染后代的发育和健康的影响。
更新日期:2020-12-05
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