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Original Article
 
Morphological and morphometric study on the early developmental stages of the Egyptian toad Bufo regularies Reuss
Alaa El-Din H. Sayed1, Ekbal T. Wassif1, Afaf I. Elballouz1,2
1Zoology department, Faculty of Science, Assiut University, 71516 Assiut, Egypt.
2Zoology department, Faculty of Science, Misurate University, Misurate, Libya.

Article ID: 100009A04AS2016
doi:10.5348/A04-2016-9-OA-1

Address correspondence to:
Alaa El-Din Hamid Sayed
Zoology department
Faculty of Science, Assiut University, 71516 Assiut
Egypt

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How to cite this article
Sayed AH, Wassif ET, Elballouz AI. Morphological and morphometric study on the early developmental stages of the Egyptian toad Bufo regularies Reuss. Edorium J Anat Embryo 2016;3:1–14.


Abstract
Aims: This study aimed to examine the developmental changes in external morphology characters for some embryonic larval period of Bufo regularies from River Nile, Assuit, Egypt.
Methods: Our experiment started when tadpoles began to feed. The adapted embryos were divided into three large tanks, each with 200 embryos. Collecting of samples started from feeding age every three days until end of metamorphosis (the absorption of tail). External measurements of the early developmental stages including body height (BH), body width (BW), eye diameter (ED), forelimb length (FLL), head-body length (H-BL), hind limb length (HLL), internarial distance (IND), interorbital distance (IOD), nostril diameter (ND), distance between nariel and orbital (NOD), tail length (TAL), tail height (TH), total length (TL), tail muscle height (TMH) and body weight (BWE) were recorded.
Results: The morphological description reported for each stage indicated many differences between the different developmental stages.
Conclusion: This study may be considered as morphological key for the different developmental stages of the Egyptian toad tadpoles (Bufo regularies).

Keywords: Bufo regularies, Egyptian toad, Morphology, Tadpoles


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Author Contributions:
Alaa El-Din H. Sayed – Substantial contributions to conception and design, Acquisition of data, Analysis and interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Ekbal T. Wassif – Analysis and interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Afaf I. Elballouz – Analysis and interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Guarantor of submission
The corresponding author is the guarantor of submission.
Source of support
None
Conflict of interest
Authors declare no conflict of interest.
Copyright
© 2016 Alaa El-Din H. Sayed et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.