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| The musk secretion rhythm and the influencing factors in captive forest musk deer |
| WANG Jing1, BAI Ruidan1, CAI Yonghua2, LI Yong3, CHENG Jianguo2, FU Wenlong2, ZHOU Mi3, SHENG Yan1, MENG Xiuxiang1 |
(1 School of Environment and Natural Resources，Renmin University of China，Beijing 100872，China)
(2 Sichuan Institute of Musk Deer Breeding，Dujiangyan 611830 Sichuan，China)
(3 Sichuan Fengchun Musk Deer Technology Group Co. Ltd., Chengdu 610000, China)
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Abstract From May to August of 2016 to 2017, behavioral and physiological monitoring was conducted on the musk secretion of captive forest musk deer (Moschus Berezovskii) in Maerkang Musk deer farm of western Sichuan, the temporal pattern of musk secretion and its relationships with body weight and age were analyzed by recording the time of prime secretion, the vigorous secretion start, the vigorous secretion finish, the secretion end and the duration of each phase. The results show that, the average date of prime secretion was June 16th [(167.06±7.75)d, n=141], and entered the vigorous secretion in June 17th [(168.52±7.67)d, n=141] on average, then secretion weaken in June 21st [(172.17±7.26)d, n=138], and ended in June 25th [(176.27±8.11)d, n=131]. There were significant negative correlations between body weight and date of prime secretion, finish of vigorous secretion and end musk secretion (r PS = -0.234，P PS = 0.028；r VSF = -0.215，P VSF = 0.047；r SE = -0.229，PSE = 0.043), namely the heavier body weight, the earlier secretion. Secretion periods were significant different (F 17,113 = 3.482, P=0.003) with age groups, among which that at 2 years old was the longest [(13.07±2.08)d, n = 20], and significantly higher than that at 3 years old [(9.38±0.76)d, n=12, P = 0.042] and 4 years old[ (7.80±1.60)d, n=5, P = 0.013]. The average musk production was (11.85±0.96)g (n=114), and showing an increasing trend with the extension of the secretion period, but was not significant (P = 0.854). Based on the correlations between the musk secretion rhythm and musk production, and the factors such as age and body weight, we can distinguish and predict the capacity and production of musk secretion among captive individuals, as the basis of productivity optimization of captive forest musk deer, it can provide reference for breeding high quality strains of forest musk deer.
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