Sexual dimorphism in Macaca fascicularis using morphometric data

Chan, Wey Yuh (2020) Sexual dimorphism in Macaca fascicularis using morphometric data. [Project Paper] (Submitted)

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Abstract

Sexual dimorphism is a phenomenon where, beyond the variations in their external genitalia, the two sexes of the same species manifest distinct characteristics. Making sure the important genes can be inherited to the next generation, sexual dimorphism in terms of morphometric data aids primates in their selection of mates and sustains their survivability. This study aimed to determine the sexual dimorphism of Macaca fascicularis at different age categories as well as to determine the presence of different growth rates between males and females of Macaca fascicularis. A total of 60 Macaca fascicularis were obtained from PERHILITAN within 2 hours of euthanasia. Standardised morphometric measurements which comprised of body weight, total body length, cranial circumference, length of head, width of brow ridge, chest circumference, abdominal circumference, shoulder-to-elbow, elbow-to-wrist, wrist-to-tip of middle finger, hip-to-knee, knee-to-ankle, ankle-to-tip of big toe, and heel-to-tip of big toe were recorded. Results showed that dimorphism in body weight and heel-to-tip of big toe length are significant during the subadult age as well as male growth precedes the female for all morphometric measurements in the adult age. In conclusion, sexual dimorphism was initiated at the subadult age for the morphometric parameters of body weight and heel-to-tip of big toe. However, a more distinct level of sexual dimorphism occurs in the age of adulthood.

Item Type:	Project Paper
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms. Nordeena Abdul Aziz
Date Deposited:	19 Oct 2023 04:07
Last Modified:	19 Oct 2023 04:07
URI:	http://psaspb.upm.edu.my/id/eprint/1475

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