Histology of Selected Bornean Frogs' Skin in Sarawak, Malaysia

Nur Amirah, Md. Sungif (2017) Histology of Selected Bornean Frogs' Skin in Sarawak, Malaysia. Masters thesis, Universiti Malaysia Sarawak.

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Abstract

Previous study on Bornean frogs' skin shows that the skin did help on accelerating the wound healing than normal dressing. The wound healing rates were assisted by the presence of antimicrobial peptide inside the gland of frogs' skin. However, information about their skin component especially glands types and distribution is still unkown. Thus, the aims of this study were to identify variations of skin structure through histology of Bornean frogs. Samplings were conducted from February 2014 until September 2015 to obtain six species from various areas. The skin was cut into six parts and kept in 10% formalin before undergoing histological process for slide preparation. Haematoxylin and eosin staining agents were used to stained skin structures. Thirteen skin characters were examined in the Bornean frogs and all importants of the skin, such as glands and chromatophores were documented. All glands were found more abundantly at dorsum compared to the venter, explaining the thicker dorsum. Correlation test revealed that for all species studied except Limnonectes kuhlii, the thickness of stratum spongiosum affected by the size of granular gland (p<0.05). The bufonids had thicker skin with the least number of mucous glands, explaining why toads have drier and thicker skin than frogs. Frogs from Dicroglosidae had numerous mucous glands, while those from Ranidae had numerous poison glands.

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