Baró-Camarasa Isis, Galván-Magaña Felipe, Cobelo-García Antonio, Marmolejo-Rodríguez Ana Judith
Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, La Paz, Baja California Sur, Mexico.
Instituto de Investigacións Mariñas (IIM-CSIC), Vigo, Galicia, Spain.
Mar Pollut Bull. 2023 Mar;188:114619. doi: 10.1016/j.marpolbul.2023.114619. Epub 2023 Jan 21.
The Pacific sharpnose shark Rhizoprionodon longurio is an abundant shark consumed by human population in Mexico. This study aimed to determine and compare the concentrations of thirteen essential elements (K, S, P, Na, Ca, Mg, Fe, Zn, Se, Cu, Mn, Cr and Co) and eleven non-essential elements (As, Sr, Cd, V, Li, U, Tl, Ag, Sn, Sb and Pb) in the muscle and liver of a pregnant female, fished near the copper mine of Santa Rosalía, and their respective embryos. Major, minor and trace (essential and non-essential) elements were transferred during gestation to embryos. All major elements analyzed had significantly higher concentrations in embryos liver than the pregnant female, except for magnesium. Higher concentrations in embryo tissues than the pregnant female tissues were found for the non-essential trace elements of strontium, lithium, thallium and silver, which indicate an easy maternal transfer of these non-essential elements.
太平洋尖吻鲨（Rhizoprionodon longurio）是一种数量众多的鲨鱼，在墨西哥被人类食用。本研究旨在测定并比较一条在圣罗萨利亚铜矿附近捕获的怀孕雌鲨及其胚胎的肌肉和肝脏中13种必需元素（钾、硫、磷、钠、钙、镁、铁、锌、硒、铜、锰、铬和钴）和11种非必需元素（砷、锶、镉、钒、锂、铀、铊、银、锡、锑和铅）的浓度。在妊娠期间，常量、微量（必需和非必需）元素会转移至胚胎。除镁外，所有分析的常量元素在胚胎肝脏中的浓度均显著高于怀孕雌鲨。在胚胎组织中发现锶、锂、铊和银这些非必需微量元素的浓度高于怀孕雌鲨组织，这表明这些非必需元素易于通过母体进行转移。
