| long-term population survey of the sulawesi black macaques (macaca nigra) at tangkoko nature reserve, north sulawesi, indonesia. | the sulawesi black macaque (macaca nigra) population at tangkoko nature reserve in north sulawesi, indonesia has been the focus of periodic study for over 30 years. the population has shown considerable decline during much of that time. here we present the results of a long-term population survey of the tangkoko m. nigra, conducted over the past decade, to provide updated information and on-going assessment of the population. line-transect sampling was conducted annually from 1999 to 2002 and 20 ... | 2013 | 23161483 |
| alpha male replacements and delayed dispersal in crested macaques (macaca nigra). | in species with a high male reproductive skew, competition between males for the top dominant position is high and escalated fights are common between competitors. as a consequence, challenges incur potentially high costs. selection should favor males who time an alpha male challenge to maximize chances of a successful outcome minimizing costs. despite the importance of alpha male replacements for individual males, we know little about the timing of challenges and the condition of the challenger ... | 2017 | 26194621 |
| identification of entamoeba polecki with unique 18s rrna gene sequences from celebes crested macaques and pigs in tangkoko nature reserve, north sulawesi, indonesia. | unique species of macaques are distributed across sulawesi island, indonesia, and the details of entamoeba infections in these macaques are unknown. a total of 77 stool samples from celebes crested macaques (macaca nigra) and 14 stool samples from pigs were collected in tangkoko nature reserve, north sulawesi, and the prevalence of entamoeba infection was examined by pcr. entamoeba polecki was detected in 97% of the macaques and all of the pigs, but no other entamoeba species were found. the nuc ... | 2016 | 26861809 |
| daytime birth of a baby crested black macaque (macaca nigra) in the wild. | in mammals, which give birth to more or less dependent offspring, parturition usually takes place during the animals' resting period and in a secure environment. we report here the first direct and documented observation of a daytime birth of a wild baby crested black macaque, macaca nigra, in the tangkoko batuangus nature reserve, north sulawesi, indonesia. we further consider the parturition time as a female reproductive strategy in a broader evolutionary framework. | 2008 | 18565691 |