Igado Olumayowa Olawumi
Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Nigeria.
Ital J Anat Embryol. 2011;116(2):104-10.
This study investigates the morphometry of two sense organs, the eyeball and tongue, of the Nigerian local dog (11 males, 14 females), all aged 2 years and above. The samples were grouped according to gender and weight (up to 12 kg or above that weight). The average values obtained for the weights of the left and right eyeballs and the tongue were 3.77 +/- 0.51 g, 3.68 +/- 0.74 g and 2.96 +/- 0.38 g respectively, while the length of the tongue, its thickness and width at the root and apex were 14.20 +/- 2.29 cm, 0.87 +/- 0.30 cm, and 0.21 +/- 0.05 cm respectively. The circumferences of the eyeballs (antero-posterior, mediolateral and peri-orbital) were all found to be higher in females, except the antero-posterior circumference of left eye, in spite of heavier eyeballs in males. Also, the females showed a wider rima oris and higher values for most of the tongue measurements. A positive correlation existed between the weight of the animal and that of the head and tongue, while a negative correlation was observed between the body weight and the weight of the eyeballs. This report highlights the presence of sexual dimorphism and mild lateral asymmetry in this rarely reported breed of dog. The data obtained from this study may find application in feeding physiology, ophthalmic clinical manipulations and comparative anatomy.
本研究调查了尼日利亚本地犬（11只雄性，14只雌性）两种感觉器官眼球和舌头的形态测量数据，所有犬龄均在2岁及以上。样本按性别和体重（12千克及以下或超过该体重）分组。左右眼球及舌头重量的平均值分别为3.77±0.51克、3.68±0.74克和2.96±0.38克，而舌头的长度、根部和顶端的厚度及宽度分别为14.20±2.29厘米、0.87±0.30厘米和0.21±0.05厘米。尽管雄性眼球较重，但除左眼的前后周长外，发现雌性眼球的周长（前后、中外侧和眶周）均更高。此外，雌性的口裂更宽，舌头的大多数测量值也更高。动物体重与头部和舌头的重量呈正相关，而体重与眼球重量呈负相关。本报告强调了这种鲜有报道的犬种存在性别二态性和轻度的侧不对称性。本研究获得的数据可能在喂养生理学、眼科临床操作和比较解剖学中得到应用。
