PMID: 15376536Sep 21, 2004Paper

Maternal transfer efficiency and transgenerational toxicity of methylmercury in Daphnia magna

Environmental Toxicology and Chemistry
Martin T K Tsui, Wen-Xiong Wang

Abstract

We examined maternal transfer efficiency, retention by subsequent generations, and transgenerational toxicity of methylmercury (CH3Hg or MeHg) in a population of freshwater zooplankton (Daphnia magna). The effect of dietary MeHg residence time in the daphnids on the efflux system also was quantified. After ingesting a relatively high dosage of MeHg, D. magna exhibited a reduction of live neonates and an increase of undeveloped eggs (or embryos), which reflected the sublethal toxicity of MeHg. The daily maternal transfer efficiency of MeHg to both reproductive outputs ranged from 0.42 to 4.9% over different ages of the parental daphnids, which was dependent on the daily reproductive output. During the lifetime of D. magna, reproduction contributed to 10.8% +/- 1.74% (n = 3) SD of total MeHg loss from the parental daphnids. The percentage of MeHg retention by the second generation (F1) of D. magna (40-60%) was generally higher than that by the parental generation (F0; approximately 25%) after 20 d of depuration. Methylmercury imposed sublethal toxicity to the F0 and F1 generations, but a smaller effect was observed on the F2 generation. Because of the very low MeHg body burden in the subsequent generations, we hypothesized that f...Continue Reading

Citations

Oct 11, 2008·Archives of Environmental Contamination and Toxicology·Emily C RogevichGary M Rand
Nov 12, 2010·Archives of Environmental Contamination and Toxicology·John M Brausch, Christopher J Salice
Apr 26, 2007·Proceedings of the National Academy of Sciences of the United States of America·Roxanne KarimiCarol L Folt
Jul 28, 2011·Journal of Environmental Sciences (China)·Wenhong FanYuan Zhang
Oct 24, 2007·Reproductive Toxicology·Michael K Skinner
Feb 10, 2006·Annals of the New York Academy of Sciences·Michael K Skinner, Matthew D Anway
Dec 18, 2013·Environmental Toxicology and Chemistry·Dieter I M De ConinckKarel A C De Schamphelaere
Sep 30, 2014·Reproductive Toxicology·Dzigbodi A DokeJulia M Gohlke
Aug 25, 2017·Dose-response : a Publication of International Hormesis Society·José Luis Gama-FloresS Nandini
Jun 8, 2018·Environmental Toxicology and Chemistry·Charlotte PhilippeGudrun De Boeck
Jan 26, 2018·Archives of Environmental Contamination and Toxicology·B B CastroS C Antunes
Mar 10, 2016·Anais Da Academia Brasileira De Ciências·Suellen C M SalesMarcela M Ribeiro
Oct 8, 2009·Environmental Science & Technology·Martin Tsz Ki TsuiEdward A Nater
Jul 4, 2013·The Journal of Experimental Biology·Richard J MaunderKatherine A Sloman
Nov 22, 2019·Environmental Science & Technology·Jiunn C FongMarilou P Sison-Mangus

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