PMID: 16519315Mar 8, 2006Paper

Effects of environmentally relevant concentrations of atrazine on gonadal development of snapping turtles (Chelydra serpentina)

Environmental Toxicology and Chemistry
S R de SollaGregory Mayne

Abstract

The herbicide atrazine has been suspected of affecting sexual development by inducing aromatase, resulting in the increased conversion of androgens to estrogens. We used snapping turtles (Chelydra serpentina), a species in which sex is dependent on the production of estrogen through aromatase activity in a temperature-dependent manner, to investigate if environmentally relevant exposures to atrazine affected gonadal development. Eggs were incubated in soil to which atrazine was applied at a typical field application rate (3.1 L/ha), 10-fold this rate (31 L/ha), and a control rate (no atrazine) for the duration of embryonic development. The incubation temperature (25 degrees C) was selected to produce only males. Although some males with testicular oocytes and females were produced in the atrazine-treated groups (3.3-3.7%) but not in the control group, no statistical differences were found among treatments. Furthermore, snapping turtle eggs collected from natural nests in a corn field were incubated at the pivotal temperature (27.5 degrees C) at which both males and females normally would be produced, and some males had oocytes in the testes (15.4%). The presence of low numbers of males with oocytes may be a natural phenomenon, ...Continue Reading

Citations

Feb 7, 2016·Ecotoxicology·Juliana dos Santos MendonçaAndré Luiz Quagliatto Santos
Aug 13, 2011·The Science of the Total Environment·Shane Raymond de SollaPaul Mikoda
Aug 25, 2011·Chemosphere·Shane Raymond de Solla, Pamela Anne Martin
Jul 10, 2009·Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution·Sara I Storrs-Méndez, Raymond D Semlitsch
Nov 2, 2013·Bulletin of Environmental Contamination and Toxicology·Ashley D WaltersJohn S Placyk
Nov 7, 2014·Critical Reviews in Toxicology·Glen J Van Der KraakKeith R Solomon
Feb 14, 2015·Environmental Monitoring and Assessment·Derrick L DourosJames M Novak
Dec 5, 2006·Environmental Pollution·Herlinde NoppeHubert F De Brabander
Mar 23, 2011·The Journal of Steroid Biochemistry and Molecular Biology·Tyrone B HayesEmily Willingham
Jul 16, 2016·Journal of Immunotoxicology·Siyavash Soltanian
Oct 23, 2008·Critical Reviews in Toxicology·Keith R SolomonGlen J Van Der Kraak
Aug 6, 2013·Integrated Environmental Assessment and Management·David B MayfieldAnne Fairbrother
Nov 18, 2017·Environmental Science and Pollution Research International·Graciela Quintana SaalfeldElton Pinto Colares
Jun 15, 2019·Drug and Chemical Toxicology·Isabela Vieira CarneiroAndré Luiz Quagliatto Santos
Jul 6, 2019·Ecotoxicology and Environmental Safety·Líria Queiroz Luz HiranoLucélia Gonçalves Vieira

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