Social organization of a red junglefowl, Gallus gallus , population related to evolution theory

  title={Social organization of a red junglefowl,
 Gallus gallus
 , population related to evolution theory},
  author={Nicholas E. Collias and Elsie C. Collias},
  journal={Animal Behaviour},
Abstract The purpose of this study was to relate the social organization of a population of red junglefowl, Gallus gallus , to evolution theory. During a 7-year study of lifetime breeding success in an unconfined population of red junglefowl, only a small proportion of the most dominant cocks and hens produced most of the adults of succeeding generations. Variability in progeny number reared to independence was such that the genetically effective number of adults in the study population was… 
Red Junglefowl (Gallus gallus) selected for low fear of humans are larger, more dominant and produce larger offspring.
Domestic chickens selected for low fear had higher weight, laid larger eggs and generated larger offspring, and had a better plumage condition, which could be interpreted as the less fearful animals being better adapted to the environment in which they were selected.
Social interactions in Red Junglefowl (Gallus gallus) and White Leghorn layers in stable groups and after re-grouping
Compared high-producing White Leghorn layers to wild type Red Junglefowl, results indicated that the repertoire of social behaviours has been preserved during selection with few changes in frequencies and intensities, however, Leghorns showed a more cohesive spacing pattern than junglefowl.
Genetic structure in Red Junglefowl (Gallus gallus) populations: Strong spatial patterns in the wild ancestors of domestic chickens in a core distribution range
Spatially explicit analyses with neutral genetic markers can be highly informative and here elevates the conservation profile of the wild ancestors of domesticated chickens.
Foraging and exploratory behaviour in Red Junglefowl (Gallus gallus) selected for fear of humans
Results from the first selected generation of red junglefowl show significant differences between the selection lines among the females, with females from the high and low groups being the most explorative.
Red Junglefowl females may not bias the sex ratio of their brood in response to either their own condition or the attractiveness of the males with whom they copulate, suggesting the importance of choosing the correct methods of sex ratio analysis.
Quantitative genetics of ontogeny of sexual dimorphism in red junglefowl (Gallus gallus)
Despite striking sexual dimorphism in size and growth trajectories, size dimorphic traits in junglefowl show, with some exceptions, genetic integration between the sexes, among ages, and between traits.
Activity, social and sexual behaviour in Red Junglefowl selected for divergent levels of fear of humans
This study shows that several behaviours can be modified through correlated selection responses by selection on reduced fear of humans only, emphasising the putative role of tameness as a driver of domestication related phenotypes.
Responses of young red jungle fowl (Gallus gallus) and White Leghorn layers to familiar and unfamiliar social stimuli.
Avoidance of unfamiliar and preference for familiar conspecifics might suggest a weaker capacity of Leghorns to cope with novel social and environmental stimuli, which might have implications for the welfare of the birds in production environments when encountering unfamiliar individuals.
Domestication effects on the social behaviour of chicken (Gallus gallus)
This thesis focuses on the difference between the domesticated chicken that ancestor the Red Junglefowl and in other species the domestication variant are in general more tolerant to a higher density of conspecific as well as they are more sociable.