Methylmercury Content of Eggs in Yellow Perch Related to Maternal Exposure in Four Wisconsin Lakes

Autor:	Chad R. Hammerschmidt, Ronald G. Rada, James G. Wiener, Bradley E. Frazier
Rok vydání:	1999
Předmět:	MERCURE Perch biology Ecology chemistry.chemical_element General Chemistry biology.organism_classification Mercury (element) chemistry.chemical_compound Animal science Percidae chemistry Dry weight Dissolved organic carbon Environmental Chemistry Water pollution Methylmercury
Zdroj:	Environmental Science & Technology. 33:999-1003
ISSN:	1520-5851 0013-936X
Popis:	We examined the influence of maternal mercury and selected lacustrine variables on the mercury content of eggs from yellow perch (Perca flavescens). Total mercury, methylmercury, and inorganic mercury were determined in eggs and carcasses (less eggs) from three seepage lakes with a pH range of 6.1−7.0 and a fourth lake in which pH was experimentally increased from 5.5 to 6.8 by addition of alkaline groundwater. The concentration of total mercury in eggs was strongly correlated with that in the maternal carcass. Concentrations and burdens of mercury in eggs and carcasses were inversely correlated with lake water pH, acid-neutralizing capacity, calcium, and dissolved organic carbon. In eggs containing more than 30 ng/g dry weight (4.5 ng/g wet weight) of total mercury, methylmercury averaged 91% of total mercury and ranged from 85% to 96%. Mean burdens of total mercury in individual eggs varied greatly among lakes (range, 2.3−63 pg), and the egg mass averaged 1.9% of the whole-body burden. We conclude that ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::55379e3ba13d1c77d9e42ca755695a7e https://doi.org/10.1021/es980948h Zobrazit plný text záznamu