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September 2012 Volume 1 Issue
6
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Sayed AEH
Mekkawy IA
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Gobal Advanced Research Journal
of Environmental Science and Toxicology (GARJEST) ISSN:
2315-5140
September 2012 Vol. 1(6), pp.
143-151
Copyright © 2012 Global Advanced Research Journals
Full Length
Research Paper
4-Nonylphenol induced
morphological and histopathological malformations in Bufo
regularis tadpoles
Alaa El-Din H. Sayed1*, Sara S. Abdel Hakeem1,
Usama M. Mahmoud1 and Imam A. Mekkawy2
1Department
of Zoology, Faculty of Science, Assiut University, Assiut,
Egypt.
2Department
of Biology, Faculty of Science, Taif University, Taif, Saudi
Arabia.
*Corresponding Author E-mail:
alaa_h254@yahoo.com; Tel:+020882412381,
Fax:+020882342708
Accepted 03 September, 2012
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Abstract |
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Global decline in frog populations is thought to
indicate environmental damage caused by human
activity. Pollution especially chemicals are found
to contaminate aquatic ecosystems and their animals
including fish and amphibians during their adult
life and sensitive stages of development.
Nonylphenol ethoxylate (NPE) is one of the most
dangerous chemicals that are recorded in aquatic
environments, bacterial degradation of nonylphenol
ethoxylates produces more toxic nonylphenol (NP)
which is estrogenic both on vitro and vivo assays.
In present work, the exposure of embryos of Egyptian
toad Bufo regularis to different sublethal
doses of 4-nonylphenol (1.5, 2.5, and 3.5 µgl-1)
resulted in mortality rate increase and as a result
some morphological malformations with
histopathological changes in some organs were
revealed. This study indicated the destructive
effects of 4-Nonylphenol on the tadpoles of Egyptian
toad.
Keywords:
4-Nonylphenol; malformations; histopathology,
tadpoles; Bufo regularis
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