scholarly journals Social behaviour, stress and susceptibility to infection in house mice (Mus musculus): effects of duration of grouping and aggressive behaviour prior to infection on susceptibility to Babesia microti

Parasitology ◽  
1993 ◽  
Vol 107 (2) ◽  
pp. 183-192 ◽  
Author(s):  
C. J. Barnard ◽  
J. M. Behnke ◽  
J. Sewell

SUMMARYUnrelated and initially unfamiliar male CFLP mice, maintained for different periods in groups of 6, differed in both their rate of clearance of Babesia microti and the time taken to reach peak parasitaemia in relation to their aggressive behaviour within groups prior to infection. Males maintained in groups for shorter periods and showing more aggression within their group were slower to clear infection and males showing more marked external evidence of aggressive interaction reached a peak of parasitaemia sooner. Serum IgG and corticosterone analyses were consistent with increased aggression causing stress-induced immunodepression but relationships with aggression and social status were not simple. Males showing more aggression tended to enter their groups with higher levels of corticosterone and, to a lesser extent, reduced levels of IgG compared with other mice. The results thus suggest that increased susceptibility to disease may be a cost to males aggressively maintaining high social status.

Parasitology ◽  
1994 ◽  
Vol 108 (5) ◽  
pp. 487-496 ◽  
Author(s):  
C. J. Barnard ◽  
J. M. Behnke ◽  
J. Sewell

SummaryAssociations between social rank, immunodepression and resistance toBabesia microtiinfection within single-sex groups of male house mice suggest rank-dependent suites of response involving different hormonal and immune changes in relation to aggressive behaviour and group size prior to infection. Reduced resistance among high-ranking males was associated with increased serum testosterone and corticosterone concentration and reduced serum immunoglobulin, but was independent of group size. Among low-ranking males, hormonal changes were not associated with resistance toB. microtibut changes in corticosterone concentration and measures of immunodepression increased with group size and aggressive behaviour. The results concur with earlier findings suggesting differences between high- and low-ranking mice in their physiological responses to social experience and consequently reduced resistance toB. microtiinfection among high-ranking individuals.


2005 ◽  
Vol 2005 ◽  
pp. 83-83
Author(s):  
E. Genever ◽  
C. R. Webb ◽  
D. M. Broom

Competition resulting in high social status and maintenance of that status within farmed pigs may have both welfare and economic consequences. Aggressive behaviours, associated with the establishment and maintenance of a dominance hierarchy, may cause poor welfare and skin damage reducing the value of pigs at slaughter. In order to investigate the impact of social status on welfare we first need to establish the status of individuals relative to their peers. In this paper we compare two alternative indicators of pig rank, namely: (i) aggressive interactions between individuals - the occurrence of aggressive behaviour from pig A to pig B is often assumed to imply social dominance of pig A over pig B; and (ii) the order in which pigs stand at the feeder - an advantage of attaining high social status in many populations is priority of access to food. Social rank of individuals based on observed aggressive behaviour can only be assigned once evidence for a linear or quasi-linear hierarchy has been established (Langbein and Puppe, 2004). In a population with a purely hierarchical structure we expect all triads of individuals to be transitive, that is A→B, B→C implies A→C. For observational studies it is unlikely that interactions between all individuals will be observed. Here we present a novel methodology by which we can assess the linearity of the dominance structure that is not affected by missing or null interactions between individuals. By conducting a census of all types of triad in a social network we can assess whether the subset of interactions observed provide evidence of a linear or quasi-linear hierarchy. Transitive triads provide evidence of linear hierarchy whilst intransitive triads, such as A→B, B→C, C→A, contradict the presence of a linear hierarchy.


Author(s):  
Irma Setiawan

Social dialect variation is diversity and richness of dialect owned by an individual or group in Sasak monolingual society. Moreover, the diversity of social dialect is also often used as a medium for transferring ideology, identity, and existence by an individual or group of individual or other groups. Thus, the purpose of this study is to describe the form of vocabulary choice in social dialect variation of Sasak community to show differences in speech who is high social status (superior) and low social status (inferior) between individuals or groups and between women and men. The theory used is social dialect variation form of Janet Holmes and critical analysis Norman Fairclough. The data was collected by observing methods and interview as well as the basic techniques and derivatives, observation and documentation methods. Sources of data gathered from Sasak speakers who are communicating. Data were analyzed by using descriptive qualitative method which aims to make systematic description, categorization, and patterning. Data are presented formally and informally. At last, this study resulted in different forms of social dialect variation by an individual or group and by women and men who can cause physical-psychic intersection.


Paleobiology ◽  
1988 ◽  
Vol 14 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Rob Hoffman

Seven taxa of raptorial birds were experimentally fed a controlled sample of 50 house mice (Mus musculus). Bones recovered from the pellets were examined for interspecies variability in preservation to assess the potential contribution of specific raptors to patterning in fossil assemblages. Quantitative analyses demonstrate that patterns in bone fragmentation may assist in the identification of particular raptor species as depositional agents in small mammal assemblages.


2021 ◽  
Vol 15 ◽  
pp. 183449092110031
Author(s):  
Xuyun Tan ◽  
Xuejiao Dou ◽  
Yue Zhang ◽  
Cai Xing ◽  
Baoyu Bai ◽  
...  

In the context of rapid social change, the perception of social stratification has far-reaching and complex influences on human psychology and behavior, including citizen participation. The current research explored the interactive influence of social status and subjective social mobility on citizen participation. Two studies used experimental methods to manipulate subjective social mobility and social status, respectively, to examine the interactive effect. Taken together, the results of both studies revealed that the interaction between social status and subjective social mobility had a significant influence on citizen participation: whereas citizen participation with high social status was not affected by subjective social mobility, citizen participation with low social status decreased with increases in subjective social mobility. This research established a combined dynamic and static analysis framework of social stratification structure, elucidating the current status of citizen participation under the influence of the interaction between social status and subjective social mobility, and providing a countermeasure reference for effectively promoting citizen participation.


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