scholarly journals Social relationships of male Japanese macaques (Macaca fuscata) in different habitats: a comparison between Yakushima island and Shimokita peninsula populations

2007 ◽  
Vol 115 (1) ◽  
pp. 63-65 ◽  
Author(s):  
SHIRO HORIUCHI
Keyword(s):  
Social Relationships ◽  
Macaca Fuscata ◽  
Japanese Macaques ◽  
Yakushima Island ◽  
Shimokita Peninsula

Association patterns and affiliative relationships outside a troop in wild male Japanese macaques, Macaca fuscata, during the non-mating season

Behaviour ◽  
2016 ◽  
Vol 153 (1) ◽  
pp. 69-89 ◽  
Author(s):  
Tatsuro Kawazoe
Keyword(s):  
Social Relationships ◽  
Macaca Fuscata ◽  
Principal Component ◽  
Japanese Macaques ◽  
Interaction Patterns ◽  
Mating Season ◽  
Association Patterns ◽  
Wild Male ◽  
Novel Method ◽  
Cluster 2

In many mammals, males disperse more than females. Although males in some male-dispersing species form all-male groups, little is known about the association patterns or social relationships among them. Studies on male–male social relationships have primarily focused on competition over fertile females, but affiliative relationships among males have attracted much interest recently. I suggested a novel method for the classification of males based on their behaviour by principal component analysis (PCA), and investigated association patterns, and affiliative relationships in male Japanese macaques, Macaca fuscata, during the non-mating season. I observed 12 wild male Japanese macaques for 809 h during the non-mating season. The number of other animals within visual range, the amount of time that males spent in the vicinity of other animals, and the frequency of grooming interactions were examined. I classified males into two distinctive clusters (Cluster 1 and 2) according to their association and interaction patterns. Cluster 1 males associated with females and participated in grooming with them. Cluster 2 males had less visual encounters with females and did not groom them. Cluster 2 males showed proximity to other Cluster 2 males in all possible dyads. Although Cluster 2 males showed less proximity to each other than Cluster 1 males did, they frequently exchanged grooming among themselves. Cluster 2 males groomed Cluster 1 males more frequently than they were groomed by them. These results suggested that Cluster 1 were troop males, and Cluster 2 were non-troop males. Cluster 2 males had less opportunity for social interaction than Cluster 1 (troop) males, and they may form all-male groups. Males in all-male groups engaged in more frequent grooming than troop males. In addition, they groomed troop males more frequently than they were groomed. These results suggest that males could be separated by their behaviour. Male–male affiliative relationships might be influenced by within-group potential competition and imbalanced grooming appears to cause troop males to tolerate non-troop males which might be immigrated in near future.

scholarly journals Draft Genome Sequences of Sarcina ventriculi Strains Isolated from Wild Japanese Macaques in Yakushima Island

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Kazunari Ushida ◽  
Sayaka Tsuchida ◽  
Yoshitoshi Ogura ◽  
Tetsuya Hayashi ◽  
Akiko Sawada ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Macaca Fuscata ◽  
Draft Genome ◽  
Japanese Macaques ◽  
Genomic Sequences ◽  
Macaca Fuscata Yakui ◽  
Genome Sequences ◽  
Yakushima Island ◽  
Sarcina Ventriculi ◽  
The Family

We report the draft genome sequences of Sarcina ventriculi strains 14 and 17, both isolated from feces of wild Yakushima macaques ( Macaca fuscata yakui ). These genomic sequences will be helpful for the phylogenetic consideration of the family Clostridiaceae and understanding of the contribution of intestinal microbiota to the survival of Yakushima macaques.

scholarly journals Acquisition and functional consequences of social knowledge in macaques

2017 ◽  
Vol 4 (2) ◽  
pp. 160639 ◽  
Author(s):  
Barbara Tiddi ◽  
Eugenia Polizzi di Sorrentino ◽  
Julia Fischer ◽  
Gabriele Schino
Keyword(s):  
Social Relationships ◽  
Macaca Fuscata ◽  
Selective Advantage ◽  
Japanese Macaques ◽  
Third Parties ◽  
Social Knowledge ◽  
Complex Societies ◽  
Large Database ◽  
The Social ◽  
Functional Consequences

To manoeuvre in complex societies, it is beneficial to acquire knowledge about the social relationships existing among group mates, so as to better predict their behaviour. Although such knowledge has been firmly established in a variety of animal taxa, how animals acquire such knowledge, as well as its functional significance, remains poorly understood. In order to understand how primates acquire and use their social knowledge, we studied kin-biased redirected aggression in Japanese macaques ( Macaca fuscata ) relying on a large database of over 15 000 aggressive episodes. Confirming previous research, macaques redirected aggression preferentially to the kin of their aggressor. An analysis that controlled for the rate of affiliation between aggressors and targets of redirection showed that macaques identified the relatives of group mates on the basis of the frequency of their ongoing associations. By contrast, having observed group mates interact with their mother as infants did not increase the monkeys' success in correctly identifying kin relationships among third parties. Inter-individual variation in the successful identification of the kin of aggressors and in redirecting aggression accordingly translated into differences in the amount of aggression received, highlighting a selective advantage for those individuals that were better able to acquire and use social knowledge.

Antiprotozoal and antihelminthic properties of plants ingested by wild Japanese macaques (Macaca fuscata yakui) in Yakushima Island

2020 ◽  
Vol 247 ◽  
pp. 112270 ◽  
Author(s):  
Deniz Tasdemir ◽  
Andrew J.J. MacIntosh ◽  
Polyxeni Stergiou ◽  
Marcel Kaiser ◽  
Nuha R. Mansour ◽  
...  
Keyword(s):  
Macaca Fuscata ◽  
Japanese Macaques ◽  
Macaca Fuscata Yakui ◽  
Yakushima Island

scholarly journals Troop Takeover and Reproductive Success of Wild Male Japanese Macaques on Yakushima Island (Macaca fuscata yakui)

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Sachiko Hayakawa ◽  
Joseph Soltis
Keyword(s):  
Logistic Regression ◽  
Regression Analysis ◽  
Reproductive Success ◽  
Logistic Regression Analysis ◽  
Macaca Fuscata ◽  
Japanese Macaques ◽  
Binary Logistic Regression Analysis ◽  
Alpha Male ◽  
Yakushima Island ◽  
Multimale Groups

Troop takeover is common in one-male primate groups, but there are few reports in multimale groups. Japanese macaques (Macaca fuscata) form multimale groups and males commonly join troops at the bottom rank. On Yakushima island, however, where group size is relatively small, entrance into groups at the alpha position is also observed. This paper reports on the general features of troop takeover, on the predictors of takeover events, and on the reproductive success of takeover males. Troop takeovers occurred only in the mating season; nontroop males (NTMs) did not cooperate with each other; former alpha males were rarely expelled from the troop; new alpha males did not commit infanticide; new alpha male tenure in the group was usually less than two years. Logistic regression analysis showed that the number of NTMs associating with a troop predicted the occurrence of troop takeover. Paternity discrimination revealed that 33.3% (3/9) of takeover males succeeded in siring offspring. Contrary to this low success rate, binary logistic regression analysis revealed that the takeover males can expect higher reproductive success compared to troop males. Entering a troop and out-competing the alpha male is one of many available strategies to attain reproductive success in male Japanese macaques.

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