Different types of dominance hierarchies reflect different social relationships in primates. In this study, we clarified the hierarchy and social relationships in a one-male unit of captive Rhinopithecus bieti observe...Different types of dominance hierarchies reflect different social relationships in primates. In this study, we clarified the hierarchy and social relationships in a one-male unit of captive Rhinopithecus bieti observed between August 1998 and March 1999. Mean frequency of agonistic behaviour among adult females was 0.13 interactions per hour. Adult females exhibited a linear hierarchy with a reversal of 10.9%, indicating an unstable relationship; therefore, R. bieti appears to be a relaxed/tolerant species. The lack of a relationship between the agonistic ratio of the adult male towards adult females and their ranks indicated that males did not show increased aggression towards low-ranking females. Differentiated female affiliative relationships were loosely formed in terms of the male, and to some extent influenced by female estrus, implying that relationships between the male and females is influenced by estrus and not rank alone. A positive correlation between the agonistic ratio of adult females and their ranks showed that the degree to which one female negatively impacted others decreased with reduction in rank. Similarly, a positive correlation between the agonistic ratio of females and differences in rank suggests that a female had fewer negative effects on closely ranked individuals than distantly ranked ones. These data indicate that rank may influence relationships between females. A steeper slope of regression between the agonistic ratio and inter-female rank differences indicated that the extent of the power difference in high-ranking females exerting negative effects on low-ranking ones was larger during the mating season than the birth season, suggesting that rank may influence the mating success of females.展开更多
This paper will assess the way in which consumerism is used to manipulate individuals within marginalized groups, specifically those based on race and gender. Following a Marxist framework, this paper will illustrate ...This paper will assess the way in which consumerism is used to manipulate individuals within marginalized groups, specifically those based on race and gender. Following a Marxist framework, this paper will illustrate a symbiotic relationship between the laborer and the capitalist, a hierarchal relationship where mutual dependence encourages unrelenting exploitation. Further focus will center on how these social hierarchies perpetuate a continuous enslavement of individuals politically defined as black and politically defined as woman. These identities are outlined within the framework of two active dichotomies: black/white and man/woman. Both gender and race are key factors in determining an individual's identity. Because the hegemonic gender is man, while the hegemonic race is white, any person who does not fit into those two categories simultaneously is underprivileged. Hence the reason why black and woman, both of which have been historically deemed subordinate to white and man, is automatically a part of the underprivileged working class. Since the hierarchal laborer-capitalist relationship is greatly validated by socializations, it cannot be voided by taking legal action alone. However, policy changes addressing education gaps, gender wage gaps, and hiring discrepancies, can assist in decoupling the social constructs of race and gender from class therefore minimizing racial and gender privileges.展开更多
Abstract We investigated the social relationships among adult females in two multimale-multifemale groups of black howler monkeys Alouatta pigra during a 14-month study in Palenque National Park, Mexico. Based on over...Abstract We investigated the social relationships among adult females in two multimale-multifemale groups of black howler monkeys Alouatta pigra during a 14-month study in Palenque National Park, Mexico. Based on over 900 focal hours and over 5400 scan samples recording neighboring group members, we found that females very rarely engaged in agonistic interactions and no dominance hierarchy could be discerned. Relationships among resident females were primarily affiliative, but females of one study group spent a higher proportion of time in close proximity and engaged in affiliative interactions with one another at higher rates than females in the other study group. The strength of female relationships increased with the birth of an infant. Al- though no females immigrated during the study period, the temporary association of three extragroup females with our study groups implies that the social system of black howler monkeys is more dynamic than previously suggested. These findings sug- gest that female black howler monkeys behave more similarly to female red howler monkeys A. seniculus than to female mantled howler monkeys A. palliata展开更多
基金Foundation items: This work was supported by grants from the National Natural Science Foundation of China (31160422, 30960084) the China Postdoctoral Science Foundation (2013M542379), the Program for New Century Excellent Talents in University (NCET-12- 1079), and the Key Subject of Wildlife Conservation and Utilization in Yunnan Province. Acknowledgements: Special thanks to Prof. R.-J. ZOU at Kunming Institute of Zoology, Chinese Academy of Sciences for support Mr. Y.-Z. LU (animal keeper) for his assistance during data-collection and to three anonymous reviewers for valuable suggestions.
文摘Different types of dominance hierarchies reflect different social relationships in primates. In this study, we clarified the hierarchy and social relationships in a one-male unit of captive Rhinopithecus bieti observed between August 1998 and March 1999. Mean frequency of agonistic behaviour among adult females was 0.13 interactions per hour. Adult females exhibited a linear hierarchy with a reversal of 10.9%, indicating an unstable relationship; therefore, R. bieti appears to be a relaxed/tolerant species. The lack of a relationship between the agonistic ratio of the adult male towards adult females and their ranks indicated that males did not show increased aggression towards low-ranking females. Differentiated female affiliative relationships were loosely formed in terms of the male, and to some extent influenced by female estrus, implying that relationships between the male and females is influenced by estrus and not rank alone. A positive correlation between the agonistic ratio of adult females and their ranks showed that the degree to which one female negatively impacted others decreased with reduction in rank. Similarly, a positive correlation between the agonistic ratio of females and differences in rank suggests that a female had fewer negative effects on closely ranked individuals than distantly ranked ones. These data indicate that rank may influence relationships between females. A steeper slope of regression between the agonistic ratio and inter-female rank differences indicated that the extent of the power difference in high-ranking females exerting negative effects on low-ranking ones was larger during the mating season than the birth season, suggesting that rank may influence the mating success of females.
文摘This paper will assess the way in which consumerism is used to manipulate individuals within marginalized groups, specifically those based on race and gender. Following a Marxist framework, this paper will illustrate a symbiotic relationship between the laborer and the capitalist, a hierarchal relationship where mutual dependence encourages unrelenting exploitation. Further focus will center on how these social hierarchies perpetuate a continuous enslavement of individuals politically defined as black and politically defined as woman. These identities are outlined within the framework of two active dichotomies: black/white and man/woman. Both gender and race are key factors in determining an individual's identity. Because the hegemonic gender is man, while the hegemonic race is white, any person who does not fit into those two categories simultaneously is underprivileged. Hence the reason why black and woman, both of which have been historically deemed subordinate to white and man, is automatically a part of the underprivileged working class. Since the hierarchal laborer-capitalist relationship is greatly validated by socializations, it cannot be voided by taking legal action alone. However, policy changes addressing education gaps, gender wage gaps, and hiring discrepancies, can assist in decoupling the social constructs of race and gender from class therefore minimizing racial and gender privileges.
基金Acknowledgement We thank the Mexican government (CONANP) for research permission to work at Palenque National Park granted to AE. Our research was supported by grants from the National Science Foundation (DDIG 0622386), the L.S.B. Leakey Foundation, the Department of Zoology, University of Wisconsin-Madison, and the Pittsburgh Zoo Conservation Fund. All animal care regulations and applicable national laws were followed. M. Marroquin, R. MacDonald, G. Campbell, J.M. Jose Dominguez, C. Hauglustaine, E Gimmie, and A. Herbert provided support in the field. C. Snowdon, T. Ziegler, J. Lambert, and two anonymous reviewers provided helpful comments on an earlier version of this manuscript.
文摘Abstract We investigated the social relationships among adult females in two multimale-multifemale groups of black howler monkeys Alouatta pigra during a 14-month study in Palenque National Park, Mexico. Based on over 900 focal hours and over 5400 scan samples recording neighboring group members, we found that females very rarely engaged in agonistic interactions and no dominance hierarchy could be discerned. Relationships among resident females were primarily affiliative, but females of one study group spent a higher proportion of time in close proximity and engaged in affiliative interactions with one another at higher rates than females in the other study group. The strength of female relationships increased with the birth of an infant. Al- though no females immigrated during the study period, the temporary association of three extragroup females with our study groups implies that the social system of black howler monkeys is more dynamic than previously suggested. These findings sug- gest that female black howler monkeys behave more similarly to female red howler monkeys A. seniculus than to female mantled howler monkeys A. palliata