The Metal Content in Tissues of the Ascidian Halocynthia aurantium Pallas, 1787 (Ascidiacea: Stolidobranchia) from Coastal Waters of the Sea of Japan
2021
Kosyanenko, A. A. | Ivanenko, N. V. | Yarusova, S. B. | Rakov, V. A. | Kosyanenko, D. V. | Zhukovskaya, A. F. | Zhevtun, I. G.
This article presents data on the contents of Fe, Mn, Cu, Zn, Ni, Pb, and Cd in the tissues of the tunic, muscular sac, stomach, digestive gland, and gonads of the ascidian Halocynthia aurantium Pallas, 1787 from Peter the Great Bay and Kievka Bay (Sea of Japan). The physiologically important elements Fe, Mn, and Zn prevailed in almost all organs of ascidians in terms of their concentration levels. Patterns of metal distribution in the organs and tissues of H. aurantium were determined depending on their age. The levels of content of Zn, Mn, and Cu were similar in the organs of 2- and 3-year-old individuals. The element concentrations were highest in the digestive gland (Zn), stomach (Zn, Cu), tunic (Mn), and gonads (Cu). The content of Mn in the tunic of H. aurantium from different biotopes was higher compared to other organs. The content of Pb in the tissues of H. aurantium from Kievka Bay was higher than that of the tissues of ascidians from the other studied localities.
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