For a better understanding of the potential signaling function of badge size in our population, the determination of dominance ranks and of the degree of inter-individual aggression would be necessary.
As house sparrows show flocking behavior all year round and tend to establish dominance ranks, inter-individual aggression occurs most of the year (Anderson 2006) as reflected in increases of plasma testosterone levels after the termination of molt, but long before breeding commences.
An interesting finding in our experiment showed consistency in aggressive responses of host colonies, unrelated to treatments, indicating individual innate aggression (i.e., strong correlation among the aggression level of colonies in successive cycles).
Table 2 HLM models regarding the effects of individual bullying, aggression, gender, and group normative beliefs about aggression and prosociality on individual popularity Model 1 Model 2 Model 3 Model 4 Est.
Manipulation of the wealth-status system in such cases often demands great individual effort, aggression, and chicanery.
At the individual level, aggression can emerge from frustration over a man's inability to control the female partner [ 62], an area not frequently discussed in the FGDs.
For each silverfish individual host aggression was quantified first via social acceptance experiments (standardised contact study), and then its CHCs were extracted and subjected to chemical analysis.
However, despite recent advances in the use of MBTs with individuals with aggression problems, questions remain unanswered.
However, as familiar individuals reduced aggression towards each other, it seems unlikely that negative associations were present throughout all of our familiar trials.
Recognition based on familiarity is thought to be the underlying mechanism in the so called 'dear enemy effect' (Fisher, 1954), where individuals reduce aggression towards neighbours compared to strangers.
