Research Article
Volume 5 Issue 1 - 2020
Variation on Breeding Pattern of Rhesus Monkeys (Macaca mulatta) in Captivity
Swoyam Prakash Shrestha1*, Puja Bajracharya2, Swochhal Prakash Shrestha3 and Riddhi Shrestha4
1Animal Health Research Division, NARC, Nepal
2Research Assistant, Animal Health Research Division, NARC, Nepal
3Institute of Agriculture and Animal Science T.U, Paklihawa, Nepal
4Technical Officer, Animal Health Research Division, NARC, Nepal
*Corresponding Author: Swoyam Prakash Shrestha, Animal Health Research Division, NARC, Khumaltar, Lalitpur, Nepal.
Received: November 21, 2019; Published: December 11, 2019




Abstract

Rhesus monkey (Macaca mulatta) display a distinct seasonal pattern of breeding activity which restricts birth to specific times of the year, complete cessation of ovulation and decrease in male sexual activity which leads to marked seasonal variations. The study aimed to develop a novel method to control seasonal breeding among rhesus macaques which is eco-friendly, sustainable, cost-effective and ethically acceptable. The observational cross-sectional study was conducted where a total number of 44, 68, 123, 175, 225 rhesus macaques were studied in the year 2006, 2007, 2008, 2009, 2010 respectively. Macaques were fortified with a standard balanced diet in the form of pellet and supplemented with 100gms of pumpkins and seasonal fruits and all together 14 hours (natural and artificial) of light per day was provided. The result of this study indicates that if these macaques are exposed to ambient photo period and given proper nutritional diet, then parturition can occur throughout the year. In 2006, no distinct variation in the breeding pattern was observed but as the year passes by from 2006 to 2010, parturition were found occur almost in every month of the year even during their breeding months (October, November and December) and the total number of off-spring born was increased gradually from 2 to 45. Hence the present data support the hypothesis that exposure to a non-seasonal environment, in terms of photoperiod and nutritional diet, can advance the parturition and can control the seasonal breeding among rhesus macaques. However, future work must proceed to observe the efficiency of light and diet along with other factors like ambient temperature, rainfall, humidity and vegetation on parturition, tempo of maturation and ovulatory menstrual cycle among rhesus macaques.

Keywords: Rhesus macaques; Seasonal Breeding; Photoperiod; Nutritional Diet; Parturition

References

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Citation: Swoyam Prakash Shrestha., et al. “Variation on Breeding Pattern of Rhesus Monkeys (Macaca mulatta) in Captivity”. EC Nutrition 5.1 (2020): 01-10.

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