Quantitative and Qualitative Analysis of Sexual Dimorphism in Aditus Orbitae of Kacang Goat (Capra aegragus hircus)

Document Type : Original Article

Authors

1 Department of Veterinary Science, Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia. Kampus C Unair Jalan Mulyorejo, Surabaya-60115 Indonesia

2 Department of Veterinary Science, Faculty of Veterinary Medicine, Universitas Airlangga

Abstract

The study aimed to analyze the aditus orbitae of Kacang goats as object of sexual dimorphism in different sexes. The sample size was 20 Kacang goat skulls, consists of 10 female and 10 male goats. Measurements were taken on skull length (SL), width of the zygomatic process of frontal bone (WZF), width of the frontal process of zygomatic bone (WFZ), the length of the caudal of the orbit rim (LCRO) and the greatest distance (width) of the aditus orbitae (OW). The Data was analyzed using two ways, quantitatively and qualitatively. The quantitatively done to analyze the correlation between variables and the possible differences among variables of different sexes. The results showed that WZF, WFZ and OW variables were positively correlated with skull length (SL) (p<0.05), except the length of caudal rim of the orbit (LCRO). ZF and Orbital width were significant between sexes (p<0.05), furthermore both of WFZ and LCRO, have similarly in size (p>0.05). LCRO/SL and LCRO/OW ratio, however, also both of zygomatic process (ZF) and orbital (OW) width, those were could be used for estimating of sexual dimorphism (p<0.05). The aditus orbitae shape show significant sexual dimorphism, wherein in female are ellipsoid and larger while in male rectangular and relatively smaller. The present study concludes that by quantitative combining with qualitative techniques could be used for identifying the sexes estimation of aditus orbitae of Kacang goat.

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