How animals allocate their time to various activities has significant consequences for their survival because they reflectthe different constraints on time-energy balances. Many ecological variables, such as day lengt...How animals allocate their time to various activities has significant consequences for their survival because they reflectthe different constraints on time-energy balances. Many ecological variables, such as day length, temperature, food availability,are supposed to effect on activity budgets allocation of temperate primates. To examine the potential influence of these threevariables, the activity budgets of Rhinopithecus bieti was studied at Xiaochangdu, Tibet from June 2003 to March 2005. Pearsoncorrelations were utilized to assess potential relationships between activity budget and day length, food availability and temperature,and stepwise multiple regressions to identify the priority of resting and other activities (activities besides feeding, movingand resting). Time spent resting and doing 'other activities' is positively related to day length, temperature and food availability.No significant correlations were found between feeding/moving time and any of these variables. This suggests that foraging time(feeding + moving) takes priority over rest and other activities. Day length and foraging time (as independent variables) wererelated to the time spent in the other two activities besides feeding/moving (as dependent variables). Both time spent testing andin 'other activities' were highly significant positive functions of day length, with the latter a highly significant negative functionof feeding time and moving time. Resting time may therefore be interpreted as taking priority over 'other activities' time. Theseresults provide further evidence of the importance of day length, temperature and food availability to seasonal activity展开更多
To understand the effects of the chemical and physical properties of plant leaves on food choice in Rhinopithecus bieti,we collected mature leaves of nine food and five non-food plant species at the southernmost part ...To understand the effects of the chemical and physical properties of plant leaves on food choice in Rhinopithecus bieti,we collected mature leaves of nine food and five non-food plant species at the southernmost part of the species's range.Chemical properties such as fat, ash, crude protein (CP), total phenolics (TP), and fiber content including neutral detergent fiber(NDF), acid detergent fiber (ADF), lignin, celluloses and hemicelluloses, and physical toughness were measured. R. bieti tendedto choose leaves with lower fiber content, higher ash, a higher ratio of CP/ADF, and lower toughness. No difference was foundfor fat, crude protein, total phenolics, hemicelluloses and lignin between food and non-food leaves. Even though the ratio ofCP/ADF is generally regarded as a good indicator for colobine food choice, the difference in the ratio of CP/ADF between foodand non-food leaves was only the result of differences in ADF. Since positive correlations were found between ADF and toughnessfrom all leaves (both food and non-food species), and toughness of leaves was likely easier for R. bieti to sense than fibercontent via mastication, the toughness of leaves may function as a predictor of food choice in this species.展开更多
Food distribution and predation pressure are considered to be the main ecological factors that influence the use of forest strata(basically arboreality vs.terrestriality)in non-human primates.Here,we investigate groun...Food distribution and predation pressure are considered to be the main ecological factors that influence the use of forest strata(basically arboreality vs.terrestriality)in non-human primates.Here,we investigate ground use of wild,unprovisioned black-and-white snub-nosed monkeys Rhinopithecus bieti by means of the scan sampling method.The results show that the monkeys spent 15.0% of the day time on the ground;16.6%,12.7%,and 15.6% for adult males,adult females and juveniles,respectively.Adult males and juveniles of both sexes showed significantly higher rates of terrestrial time than adult females.Females without clinging infants spent significantly more time on the ground than expected,while females with clinging infants spent significantly less time on the ground than expected.These results suggest that the higher degree of terrestrial behavior for males and juveniles may be due to their higher agility in comparison with females.Our study showed that the monkeys fed more on lichens relative to other food items when in the trees,but more on buds/leaves,flowers,fruits/nuts,resin/bark,and herbs when on the ground.According to our investigation,the ecological significance of the species' terrestriality lies mainly in the utilization of terrestrial food展开更多
Most extant nonhuman primates occasionally prey on fast-moving, warm-blooded animals; however, Indriidae, Lepilemuridae,and Colobinae either scavenged for meat or did not eat meat at all. Here we report six cases of a...Most extant nonhuman primates occasionally prey on fast-moving, warm-blooded animals; however, Indriidae, Lepilemuridae,and Colobinae either scavenged for meat or did not eat meat at all. Here we report six cases of animal consumptionby the snub-nosed monkey Rhinopithecus bieti in a wild, habituated group between 2004 and 2009 in Yunnan, China. At present,only males in an all-male unit within the study group were involved in active hunting. Such a male-biased activity may be relatedto the group structure and spatial spread of R. bieti. Two females were observed eating freshly killed birds. The findings confirmedthat R. bieti engaged in scavenging and, when hunting, employed a cranio-cervical bite to kill their prey. Meat eating islikely a nutrient maximization feeding strategy in R. bieti, especially in males. A begging behavior occurred after successful preycapture. Although begging was observed, no sharing of the meat was seen. The present findings illuminate the dietary diversity ofR. bieti and their ability to expand their dietary展开更多
Seasonal variation in environmental factors is vital to the regulation of seasonal reproduction in primates. Consequently, long-term systematic data is necessary to clarify the birth seasonality and pattern of primate...Seasonal variation in environmental factors is vital to the regulation of seasonal reproduction in primates. Consequently, long-term systematic data is necessary to clarify the birth seasonality and pattern of primates in highly seasonal environments. This study indicated that black-and-white snub-nosed monkeys (Rhinopithecus bieti) at Mt. Lasha exhibited strict birth seasonality with a pulse model. Infants were born with a certain degree of synchronization. Birth distribution showed three birth peaks, and the birth pattern showed a "V" style in even-numbered years and a gradual increase in odd-numbered years. The beginning date, end date and median birth date were earlier in even-numbered years than those in odd-numbered years. The higher latitude of their habitats, earlier birth date, shorter birth period, fewer birth peaks and stronger birth synchrony might be adaptations for strongly seasonal variation in climate and food resources. After the summer solstice when daylight length began to gradually shorten, R. bieti at Mt. Lasha started to breed during the period with the highest environmental temperature and food availability, which implied that photoperiod may be the proximate factor triggering the onset of estrus and mating. It appears that R. bieti coincided conception and mid-lactation with the peak in staple foods, and weaning with the peak in high quality of foods. Thus, food availability was the ultimate factor regulating reproductive seasonality, and photoperiod was the proximate factor fine-turning the coordination between seasonal breeding and food availability.展开更多
川、滇、黔金丝猴(Rhinopithecus roxellana、Rh.bieti、Rh.brelichi)均为我国特有种,国家一级重点野生保护动物。作为典型的食叶动物,其肠道微生物组特性研究也备受学者关注。为探究川、滇、黔金丝猴肠道微生物组结构,促进金丝猴胃肠...川、滇、黔金丝猴(Rhinopithecus roxellana、Rh.bieti、Rh.brelichi)均为我国特有种,国家一级重点野生保护动物。作为典型的食叶动物,其肠道微生物组特性研究也备受学者关注。为探究川、滇、黔金丝猴肠道微生物组结构,促进金丝猴胃肠道健康及为相关疾病防控提供参考数据,以北京动物园管理处圈养的3种7只金丝猴为研究对象,采用16S r DNA测序及分析技术,开展相同圈养环境下3种金丝猴肠道微生物组差异研究。结果显示:圈养健康金丝猴肠道微生物组的优势菌门为厚壁菌门(Firmicutes)、拟杆菌门(Bacteroidetes)和变形菌门(Proteobacteria),这与人类肠道微生物组成分相似,金丝猴暴露于人类影响和圈养环境中可能会引起肠道微生物组人源化;川金丝猴样本的肠道微生物群落的丰富度和多样性低于滇、黔金丝猴,3种金丝猴在细菌域不同分类水平上存在多物种的差异,且3种金丝猴OTUs在不同分类水平共检测到47个微生物标志物的相对丰度存在显著差异。圈养条件下,3种金丝猴的食物种类和结构基本一致,这提示相同圈养环境下3种金丝猴肠道微生物组间的差异可能并非源于圈养环境下的食物组成;此外,腹泻滇金丝猴样本肠道微生物组多样性显著降低,同时伴随着优势菌结构的改变和潜在病原菌的出现,肠道微生物菌群的紊乱可能导致个体腹泻的发生,变形菌门弧菌属(Vibrio)、肠杆菌属(Enterobacter)、克雷伯氏菌属(Klebsiella)和泛菌属(Pantoea)4个属的出现可能导致个体腹泻。研究结果可为圈养金丝猴的饲养繁殖、营养代谢和胃肠道适应等方面提供参考信息。展开更多
基金supported by the Chinese Academy of Sciences (KSCX2-1-09)the National Natural Science Foundation of China (30870375,31071937)
文摘How animals allocate their time to various activities has significant consequences for their survival because they reflectthe different constraints on time-energy balances. Many ecological variables, such as day length, temperature, food availability,are supposed to effect on activity budgets allocation of temperate primates. To examine the potential influence of these threevariables, the activity budgets of Rhinopithecus bieti was studied at Xiaochangdu, Tibet from June 2003 to March 2005. Pearsoncorrelations were utilized to assess potential relationships between activity budget and day length, food availability and temperature,and stepwise multiple regressions to identify the priority of resting and other activities (activities besides feeding, movingand resting). Time spent resting and doing 'other activities' is positively related to day length, temperature and food availability.No significant correlations were found between feeding/moving time and any of these variables. This suggests that foraging time(feeding + moving) takes priority over rest and other activities. Day length and foraging time (as independent variables) wererelated to the time spent in the other two activities besides feeding/moving (as dependent variables). Both time spent testing andin 'other activities' were highly significant positive functions of day length, with the latter a highly significant negative functionof feeding time and moving time. Resting time may therefore be interpreted as taking priority over 'other activities' time. Theseresults provide further evidence of the importance of day length, temperature and food availability to seasonal activity
基金supported by TNC "Conservation Ecology of Yunnan Snub-nosed Monkey (Rhinopithecus bieti) at Two Geographic Extremes of Species Range"PhD Funding from Dali University,National Natural Science Foundation of China (No.30770308,30960084,30960085)+1 种基金Key Laboratory of Forest Disaster Warning and Control in Yunnan Province (ZK09A313)Key Subject of Wildlife Conservation and Utilization in Yunnan Province (XKZ200904)
文摘To understand the effects of the chemical and physical properties of plant leaves on food choice in Rhinopithecus bieti,we collected mature leaves of nine food and five non-food plant species at the southernmost part of the species's range.Chemical properties such as fat, ash, crude protein (CP), total phenolics (TP), and fiber content including neutral detergent fiber(NDF), acid detergent fiber (ADF), lignin, celluloses and hemicelluloses, and physical toughness were measured. R. bieti tendedto choose leaves with lower fiber content, higher ash, a higher ratio of CP/ADF, and lower toughness. No difference was foundfor fat, crude protein, total phenolics, hemicelluloses and lignin between food and non-food leaves. Even though the ratio ofCP/ADF is generally regarded as a good indicator for colobine food choice, the difference in the ratio of CP/ADF between foodand non-food leaves was only the result of differences in ADF. Since positive correlations were found between ADF and toughnessfrom all leaves (both food and non-food species), and toughness of leaves was likely easier for R. bieti to sense than fibercontent via mastication, the toughness of leaves may function as a predictor of food choice in this species.
基金supported by the National Natural Science Foundation of China(30630016,30870375)Chinese Academy of Sciences(KSCX2-1-03)Central South Universityof Forestry & Technology
文摘Food distribution and predation pressure are considered to be the main ecological factors that influence the use of forest strata(basically arboreality vs.terrestriality)in non-human primates.Here,we investigate ground use of wild,unprovisioned black-and-white snub-nosed monkeys Rhinopithecus bieti by means of the scan sampling method.The results show that the monkeys spent 15.0% of the day time on the ground;16.6%,12.7%,and 15.6% for adult males,adult females and juveniles,respectively.Adult males and juveniles of both sexes showed significantly higher rates of terrestrial time than adult females.Females without clinging infants spent significantly more time on the ground than expected,while females with clinging infants spent significantly less time on the ground than expected.These results suggest that the higher degree of terrestrial behavior for males and juveniles may be due to their higher agility in comparison with females.Our study showed that the monkeys fed more on lichens relative to other food items when in the trees,but more on buds/leaves,flowers,fruits/nuts,resin/bark,and herbs when on the ground.According to our investigation,the ecological significance of the species' terrestriality lies mainly in the utilization of terrestrial food
基金granted by the key project of NSFC (No.30630016)the 973 Program (2007CB411600)+1 种基金the project of NSFC (No.30970442) China Program of TNC
文摘Most extant nonhuman primates occasionally prey on fast-moving, warm-blooded animals; however, Indriidae, Lepilemuridae,and Colobinae either scavenged for meat or did not eat meat at all. Here we report six cases of animal consumptionby the snub-nosed monkey Rhinopithecus bieti in a wild, habituated group between 2004 and 2009 in Yunnan, China. At present,only males in an all-male unit within the study group were involved in active hunting. Such a male-biased activity may be relatedto the group structure and spatial spread of R. bieti. Two females were observed eating freshly killed birds. The findings confirmedthat R. bieti engaged in scavenging and, when hunting, employed a cranio-cervical bite to kill their prey. Meat eating islikely a nutrient maximization feeding strategy in R. bieti, especially in males. A begging behavior occurred after successful preycapture. Although begging was observed, no sharing of the meat was seen. The present findings illuminate the dietary diversity ofR. bieti and their ability to expand their dietary
基金Foundation items: This study was supported by the National Natural Science Foundation of China (31160422, 30960084), China Postdoctoral Science Foundation (2013M542379), Program for New Century Excellent Talents in University (NCET-12-1079), and Key Subject of Wildlife Conservation and Utilization in Yunnan Province We thank the directors and staff from the Administrative Bureau of Yunling National Reserve, Lanping County, Nujiang Prefecture, Yunan Province, the residents of Dashanqing village and assistants Qing-Sheng Su and Jin-Fu Zhang.
文摘Seasonal variation in environmental factors is vital to the regulation of seasonal reproduction in primates. Consequently, long-term systematic data is necessary to clarify the birth seasonality and pattern of primates in highly seasonal environments. This study indicated that black-and-white snub-nosed monkeys (Rhinopithecus bieti) at Mt. Lasha exhibited strict birth seasonality with a pulse model. Infants were born with a certain degree of synchronization. Birth distribution showed three birth peaks, and the birth pattern showed a "V" style in even-numbered years and a gradual increase in odd-numbered years. The beginning date, end date and median birth date were earlier in even-numbered years than those in odd-numbered years. The higher latitude of their habitats, earlier birth date, shorter birth period, fewer birth peaks and stronger birth synchrony might be adaptations for strongly seasonal variation in climate and food resources. After the summer solstice when daylight length began to gradually shorten, R. bieti at Mt. Lasha started to breed during the period with the highest environmental temperature and food availability, which implied that photoperiod may be the proximate factor triggering the onset of estrus and mating. It appears that R. bieti coincided conception and mid-lactation with the peak in staple foods, and weaning with the peak in high quality of foods. Thus, food availability was the ultimate factor regulating reproductive seasonality, and photoperiod was the proximate factor fine-turning the coordination between seasonal breeding and food availability.
文摘川、滇、黔金丝猴(Rhinopithecus roxellana、Rh.bieti、Rh.brelichi)均为我国特有种,国家一级重点野生保护动物。作为典型的食叶动物,其肠道微生物组特性研究也备受学者关注。为探究川、滇、黔金丝猴肠道微生物组结构,促进金丝猴胃肠道健康及为相关疾病防控提供参考数据,以北京动物园管理处圈养的3种7只金丝猴为研究对象,采用16S r DNA测序及分析技术,开展相同圈养环境下3种金丝猴肠道微生物组差异研究。结果显示:圈养健康金丝猴肠道微生物组的优势菌门为厚壁菌门(Firmicutes)、拟杆菌门(Bacteroidetes)和变形菌门(Proteobacteria),这与人类肠道微生物组成分相似,金丝猴暴露于人类影响和圈养环境中可能会引起肠道微生物组人源化;川金丝猴样本的肠道微生物群落的丰富度和多样性低于滇、黔金丝猴,3种金丝猴在细菌域不同分类水平上存在多物种的差异,且3种金丝猴OTUs在不同分类水平共检测到47个微生物标志物的相对丰度存在显著差异。圈养条件下,3种金丝猴的食物种类和结构基本一致,这提示相同圈养环境下3种金丝猴肠道微生物组间的差异可能并非源于圈养环境下的食物组成;此外,腹泻滇金丝猴样本肠道微生物组多样性显著降低,同时伴随着优势菌结构的改变和潜在病原菌的出现,肠道微生物菌群的紊乱可能导致个体腹泻的发生,变形菌门弧菌属(Vibrio)、肠杆菌属(Enterobacter)、克雷伯氏菌属(Klebsiella)和泛菌属(Pantoea)4个属的出现可能导致个体腹泻。研究结果可为圈养金丝猴的饲养繁殖、营养代谢和胃肠道适应等方面提供参考信息。