Occurrence of Twins in Wild Formosan Macaques, Macaca cyclopis, at Mt. Longevity, Taiwan

2000 ◽  
Vol 71 (3) ◽  
pp. 154-156 ◽  
Author(s):  
Minna J. Hsu ◽  
Jin-Fu Lin ◽  
Govindasamy Agoramoorthy
Keyword(s):  
Macaca Cyclopis

Association Between Stress and Bilateral Symmetrical Alopecia in Free-Ranging Formosan Macaques (Macaca Cyclopis) in A High-Population-Density Area

2021 ◽  
Author(s):  
Chen-Chih Chen ◽  
Ai-Mei Chang ◽  
Ming-Shan Tsai ◽  
Yen-Hua Huang ◽  
Kurtis Jai-Chyi Pei ◽  
...  
Keyword(s):  
Total Population ◽  
High Population Density ◽  
Macaca Cyclopis ◽  
Adrenocortical Activity ◽  
Biological Validation ◽  
High Incidence ◽  
Normal Hair ◽  
The Mean ◽  
The Individual ◽  
Free Ranging

Abstract Since 2013, a high incidence of bilateral symmetrical alopecia has been observed in free-ranging Formosan macaques (Macaca cyclopis) in Mt. Longevity, Taiwan. We hypothesized that stress induces alopecia in this population. To verify our hypothesis, we evaluated the histopathological characteristics of skin biopsy and used a validated enzyme immunoassay (EIA) for fecal glucocorticoid metabolite (FGM) analysis, which act as an indicator of stress experienced by the individual. Follicular densities were lower (2.1–3.0 mm2) in individuals with symmetrical alopecia than in those with normal hair conditions (4.7 mm2). Furthermore, anagen to catagen/telogen ratios were lower in individuals with alopecia (0–1.4) than in those with normal hair (4.0). The histopathological characteristics of alopecia were similar to those of telogen effluvium, which indicates that stress is one of the possible etiologies. On the basis of the analytical and biological validation of EIAs for FGM analysis, 11β-hydroxyetiocholanolone was considered suitable for monitoring adrenocortical activity in both sexes of Formosan macaques. The mean concentrations (standard error; sample size) of 11β-hydroxyetiocholanolone were 2.02 (0.17; n = 10) and 1.41 (0.10; n = 31) μg/g for individuals with and without alopecia, respectively. Furthermore, the results of logistic regression analysis show that 11β-hydroxyetiocholanolone (p = 0.012) concentration was positively associated with alopecia. Thus, stress was the most likely to trigger symmetrical alopecia in Formosan macaques in Mt. Longevity. Although stress can decrease the fitness of an individual, it should not impact the total population of Formosan macaque in Taiwan. Nonetheless, stress-induced immunosuppression might increase zoonosis risk due to frequent human–macaque contact in Mt. Longevity.

TRACHOMA IN THE TAIWAN MONKEY, MACACA CYCLOPIS*

2006 ◽  
Vol 98 (1) ◽  
pp. 177-187 ◽  
Author(s):  
San-pin Wang ◽  
J. Thomas Grayston
Keyword(s):  
Macaca Cyclopis

Birth seasonality and interbirth intervals in free-ranging formosan macaques,Macaca cyclopis, at Mt. Longevity, Taiwan

Primates ◽  
2001 ◽  
Vol 42 (1) ◽  
pp. 15-25 ◽  
Author(s):  
Minna J. Hsu ◽  
Govindasamy Agoramoorthy ◽  
Jin-Fu Lin
Keyword(s):  
Birth Seasonality ◽  
Macaca Cyclopis ◽  
Interbirth Intervals ◽  
Free Ranging

Information on the distribution of Formosan monkeys (Macaca cyclopis)

Primates ◽  
1986 ◽  
Vol 27 (3) ◽  
pp. 383-392 ◽  
Author(s):  
Ken'ichi Masui ◽  
Yoshinori Narita ◽  
Susumu Tanaka
Keyword(s):  
Macaca Cyclopis

scholarly journals Body and organ weights of Macaca fuscata and Macaca cyclopis.

1984 ◽  
Vol 46 (3) ◽  
pp. 385-390 ◽  
Author(s):  
Takashi MAKITA ◽  
Takashi YAMOTO ◽  
Kazushige OGAWA ◽  
Nobukazu ARAKI ◽  
Hiroo AGAWA ◽  
...  
Keyword(s):  
Macaca Fuscata ◽  
Macaca Cyclopis ◽  
Organ Weights

Prevalence and Molecular Characterization of Plasmodium inui among Formosan Macaques (Macaca cyclopis) in Taiwan

2010 ◽  
Vol 96 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Cho-Chih Huang ◽  
Dar-Der Ji ◽  
Yu-Chung Chiang ◽  
Hwa-Jen Teng ◽  
Hung-Jen Liu ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Macaca Cyclopis ◽  
Plasmodium Inui
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