Adaptive Morphology of the Mystacial Vibrissae in the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse-1840)
Ibe, C., Onyeanusi, B., Salami, S., Ajayi, I. (2010). Adaptive Morphology of the Mystacial Vibrissae in the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse-1840). EKB Journal Management System, 3(2), 36-46. doi: 10.21608/jva.2010.44897
Chikera S. Ibe; Barth I. Onyeanusi; Suleiman O. Salami; Itopa E. Ajayi. "Adaptive Morphology of the Mystacial Vibrissae in the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse-1840)". EKB Journal Management System, 3, 2, 2010, 36-46. doi: 10.21608/jva.2010.44897
Ibe, C., Onyeanusi, B., Salami, S., Ajayi, I. (2010). 'Adaptive Morphology of the Mystacial Vibrissae in the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse-1840)', EKB Journal Management System, 3(2), pp. 36-46. doi: 10.21608/jva.2010.44897
Ibe, C., Onyeanusi, B., Salami, S., Ajayi, I. Adaptive Morphology of the Mystacial Vibrissae in the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse-1840). EKB Journal Management System, 2010; 3(2): 36-46. doi: 10.21608/jva.2010.44897

Adaptive Morphology of the Mystacial Vibrissae in the African Giant Pouched Rat (Cricetomys gambianus, Waterhouse-1840)

Journal of Veterinary Anatomy
Article 4, Volume 3, Issue 2, October 2010, Page 36-46  XML PDF (515.73 K)
Document Type: Original Article
DOI: 10.21608/jva.2010.44897
View on SCiNiTO View on SCiNiTO
Authors
Chikera S. Ibe1; Barth I. Onyeanusi1; Suleiman O. Salami1; Itopa E. Ajayi2
1Department of Veterinary Anatomy, Ahmadu Bello University Zaria, Nigeria
2Department of Veterinary Anatomy, University of Abuja, Abuja, Nigeria
Abstract
Anatomy of the mystacial vibrissae in the African giant pouched rat was investigated to establish the role played by these structures in the adaptation of the rodent to its subterranean environment. Gross morphology was based on direct obser- vation of the mystacial vibrissae with the naked eyes, while histology was based on light microscopic examination of the same structure stained with haematoxylin and eosin(H/E), Masson’s trichrome (MT) and Masson-Fontana reducing method for melanin. The mystacial vibrissae were aligned in 5-6 rows on each side of the face. The length increased rostrocaudally in each row. The mean number of vibrissae was 55.29 (± 3.42). The vibrissal follicle-sinus complex extended into the reticular layer of the dermis. In the proximal part of the sinus, trabeculae of connective tissues connected the internal and external dermal sheaths. The most distal part of the sinus contained blood vessels. The external dermal sheaths were thick and held in position by muscle fibres. Mean thickness of the cortex and medulla in the complex were 1.626 μm (± 0.110) and 0.775 μm (± 0.057), respectively. The thick external dermal sheaths were laden with mechanoreceptors. The thick cortex provided the needed elasticity necessary for touch and sensation. In conclusion, the well developed mystacial vibrissa in the African giant pouched rat is an important compensation for poor vision, necessary for an effective adaptation.
Keywords
Gross morphology; histology; mystacial vibrissae; African giant pouched rat
Statistics
Article View: 180
PDF Download: 238