PMID: 15352486Sep 9, 2004Paper

Maternal transfer of selenium in Alligator mississippiensis nesting downstream from a coal-burning power plant

Environmental Toxicology and Chemistry
John H RoeBrian Phillip Jackson

Abstract

Selenium (Se) is embryotoxic in many oviparous vertebrates, but little is known about maternal transfer of Se and its impact in reptiles. Over a four-year period, we collected three clutches of eggs of the American alligator (Alligator mississippiensis) from a single nest at a site contaminated with Se and compared egg and hatchling Se concentrations and clutch viability from this nest to nests downstream from the contaminated site (two clutches from two nests) and at a reference site (two clutches from two nests). Eggs and hatchlings from the nest at the Se-contaminated site and downstream nests had elevated Se concentrations (2.1-7.8 ppm) and lower viability (30-54%) compared to reference nests (1.4-2.3 ppm and 67-74% viability), but Se concentrations did not exceed reproductive toxicity thresholds established for other oviparous vertebrates. Selenium concentrations were higher in chorioallantoic membranes of eggs from Se-contaminated sites, suggesting that this tissue may be useful as a nondestructive index of Se exposure for embryos of A. mississippiensis. Examination of these data suggests that further studies on uptake, accumulation, and reproductive success of crocodilian embryos exposed to excessive Se are warranted.

Citations

Jun 21, 2011·Ecotoxicology·Shuangying YuRobert Colombo
May 6, 2006·Environmental Health Perspectives·William Alexander HopkinsBrian Phillip Jackson
Mar 5, 2016·Ecotoxicology·Christelle DycKrishna Das
Dec 22, 2006·The Science of the Total Environment·Thomas R RainwaterScott T McMurry
Sep 9, 2006·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Athanasios C PappasBrian K Speake
Jun 1, 2015·Chemosphere·Wilkinson L LázaroSergi Díez
Aug 15, 2020·Bulletin of Environmental Contamination and Toxicology·Troy J KieranTravis C Glenn
Apr 13, 2019·Archives of Environmental Contamination and Toxicology·John W FingerTracey D Tuberville
Dec 14, 2019·Ecotoxicology and Environmental Safety·Frances M NilsenTracey B Schock
Dec 22, 2019·The Science of the Total Environment·Abigail J LawsonPatrick G R Jodice

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