کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4422447 1308546 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
p,p′-DDE fails to reduce the competitive reproductive fitness in Nigerian male guppies
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
p,p′-DDE fails to reduce the competitive reproductive fitness in Nigerian male guppies
چکیده انگلیسی

The ecologically highly important effect of intermale competition is assessed here in a new approach to evaluating endocrine disruption at the population level. A guppy (Poecilia reticulata) male exposed to the antiandrogenic DDT metabolite p,p′-DDE competed against an unexposed male for the opportunity to fertilize a female. Offspring were then assigned to sires using microsatellites in genetic paternity analysis. In addition, a suite of male sexual characteristics including sperm count, coloration, and sexual behavior were also measured. p,p′-DDE produced no significant harmful effect on either the male sexual characteristics or the success in siring young, although the highest sublethal dose tested was only a factor 10 below the dose producing 100% mortality. At present, data on the antiandrogenic potency of p,p′-DDE are highly ambiguous. This study supports the increasing amount of evidence that the demasculinizing action of this chemical is often weak and highly variable across populations, even within the same species.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 63, Issue 1, January 2006, Pages 148–157
نویسندگان
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