scholarly journals Determinants of immigration strategies in male crested macaques (Macaca nigra)

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Pascal R. Marty ◽  
Keith Hodges ◽  
Muhammad Agil ◽  
Antje Engelhardt
Keyword(s):  
Macaca Nigra

Changes in islet cell composition during development of diabetes in Macaca nigra

Diabetes ◽  
1986 ◽  
Vol 35 (2) ◽  
pp. 165-171 ◽  
Author(s):  
C. F. Howard ◽  
A. Van Bueren
Keyword(s):  
Islet Cell ◽  
Cell Composition ◽  
Macaca Nigra

scholarly journals Female fertile phase synchrony, and male mating and reproductive skew, in the crested macaque

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
James P. Higham ◽  
Michael Heistermann ◽  
Muhammad Agil ◽  
Dyah Perwitasari-Farajallah ◽  
Anja Widdig ◽  
...  
Keyword(s):  
Group Living ◽  
Reproductive Skew ◽  
Male Dominance ◽  
Male Mating ◽  
Marked Variation ◽  
Phase Synchrony ◽  
Fertile Phase ◽  
Macaca Nigra ◽  
Primary Determinant ◽  
High Social Status

AbstractHigh social status is the primary determinant of reproductive success among group-living male mammals. Primates living in multimale–multifemale groups show the greatest variation in the strength of this link, with marked variation in reproductive skew by male dominance among species, dependent on the degree of female fertile phase synchrony, and the number of competing males. Here, we present data on two groups of wild crested macaques (Macaca nigra), living in the Tangkoko Reserve, Sulawesi, Indonesia. We investigated male monopolization of fertile females in 31 cycles of 19 females, and genetic paternity of 14 offspring conceived during the study period. We show that female fertile phase synchrony was low, that females had few mating partners in their fertile phase, and that dominant males monopolized a high proportion of consortships and matings, resulting in marked and steep mating and reproductive skew. We conclude that female cycle asynchrony provides the opportunity for strong direct male–male competition in crested macaques, resulting in monopolization of females by dominant males, consistent with their marked sexual dimorphism. Our study provides a test of the underlying factors that determine the relative occurrence and strength of different mechanisms of sexual selection, and the phenotypes that evolve as a result.

scholarly journals Loud calls in male crested macaques, Macaca nigra: a signal of dominance in a tolerant species

2010 ◽  
Vol 79 (1) ◽  
pp. 187-193 ◽  
Author(s):  
Christof Neumann ◽  
Gholib Assahad ◽  
Kurt Hammerschmidt ◽  
Dyah Perwitasari-Farajallah ◽  
Antje Engelhardt
Keyword(s):  
Loud Calls ◽  
Tolerant Species ◽  
Macaca Nigra

scholarly journals Familiar and unfamiliar face recognition in crested macaques ( Macaca nigra )

2015 ◽  
Vol 2 (5) ◽  
pp. 150109 ◽  
Author(s):  
Jérôme Micheletta ◽  
Jamie Whitehouse ◽  
Lisa A. Parr ◽  
Paul Marshman ◽  
Antje Engelhardt ◽  
...  
Keyword(s):  
Face Recognition ◽  
Social Factors ◽  
Novel Species ◽  
Primate Species ◽  
Pictorial Representation ◽  
Facial Features ◽  
Dominance Hierarchies ◽  
Macaca Nigra ◽  
Unfamiliar Face ◽  
Unfamiliar Faces

Many species use facial features to identify conspecifics, which is necessary to navigate a complex social environment. The fundamental mechanisms underlying face processing are starting to be well understood in a variety of primate species. However, most studies focus on a limited subset of species tested with unfamiliar faces. As well as limiting our understanding of how widely distributed across species these skills are, this also limits our understanding of how primates process faces of individuals they know, and whether social factors (e.g. dominance and social bonds) influence how readily they recognize others. In this study, socially housed crested macaques voluntarily participated in a series of computerized matching-to-sample tasks investigating their ability to discriminate (i) unfamiliar individuals and (ii) members of their own social group. The macaques performed above chance on all tasks. Familiar faces were not easier to discriminate than unfamiliar faces. However, the subjects were better at discriminating higher ranking familiar individuals, but not unfamiliar ones. This suggests that our subjects applied their knowledge of their dominance hierarchies to the pictorial representation of their group mates. Faces of high-ranking individuals garner more social attention, and therefore might be more deeply encoded than other individuals. Our results extend the study of face recognition to a novel species, and consequently provide valuable data for future comparative studies.

scholarly journals Ecotourism in the Tangkoko DuaSudara Nature Reserve: opening Pandora' box?

Oryx ◽  
1996 ◽  
Vol 30 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Margaret F. Kinnaird ◽  
Timothy G. O'Brien
Keyword(s):  
National Park ◽  
Legal Status ◽  
Local Community ◽  
Nature Reserve ◽  
Local Communities ◽  
Negative Effects ◽  
North Sulawesi ◽  
Macaca Nigra ◽  
Visitor Numbers

Indonesia, like many other developing countries, is turning to ecotourism in an attempt to integrate the goals of development and nature conservation. Although ecotourism may be a valuable tool for preservation of biodiversity, it can have long-term negative effects on reserves, wildlife and local communities if improperly managed. In this study the authors evaluated ecotourism in the Tangkoko DuaSudara Nature Reserve, North Sulawesi, by examining trends in visitor numbers, the tourist experience, the distribution of tourist revenues, and tourist impact on the Sulawesi black macaque Macaca nigra and spectral tarsier Tarsier spectrum. The data collected showed that, although tourism is expanding rapidly, local benefits are not being fully realized, the reserve does not generate enough money to implement management, and primate behaviour is being affected. There is urgent need for a change in legal status of the reserve if ecotourism is to be managed. National park status would accommodate ecotourism planning and development, provide for greater participation by the local community, and allow for increased revenues for management.

Activity Patterns in a Captive Group of Celebes Black Ape (Macaca nigra)

1988 ◽  
Vol 51 (2-3) ◽  
pp. 61-75 ◽  
Author(s):  
Irwin S. Bernstein ◽  
Suzanne C. Baker
Keyword(s):  
Activity Patterns ◽  
Captive Group ◽  
Macaca Nigra

Changes in Islet Cell Composition During Development of Diabetes in Macaca nigra

Diabetes ◽  
1986 ◽  
Vol 35 (2) ◽  
pp. 165-171 ◽  
Author(s):  
C. F. Howard ◽  
A. V. Bueren
Keyword(s):  
Islet Cell ◽  
Cell Composition ◽  
Macaca Nigra
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