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Effect of resource spatial correlation and hunter-fisher-gatherer mobility on social cooperation in Tierra del Fuego.

Santos JI, Pereda M, Zurro D, Álvarez M, Caro J, Galán JM, Briz i Godino I - PLoS ONE (2015)

Bottom Line: According to ethnographic sources, the Yamana developed cooperative behaviour supported by an indirect reciprocity mechanism: whenever someone found an extraordinary confluence of resources, such as a beached whale, they would use smoke signals to announce their find, bringing people together to share food and exchange different types of social capital.The model provides insight on how the spatial concentration of beachings and agents' movements in the space can influence cooperation.We conclude that the emergence of informal and dynamic communities that operate as a vigilance network preserves cooperation and makes defection very costly.

View Article: PubMed Central - PubMed

Affiliation: INSISOC, Universidad de Burgos, Escuela Politécnica Superior, Edif. "La Milanera", Burgos, Spain.

ABSTRACT
This article presents an agent-based model designed to explore the development of cooperation in hunter-fisher-gatherer societies that face a dilemma of sharing an unpredictable resource that is randomly distributed in space. The model is a stylised abstraction of the Yamana society, which inhabited the channels and islands of the southernmost part of Tierra del Fuego (Argentina-Chile). According to ethnographic sources, the Yamana developed cooperative behaviour supported by an indirect reciprocity mechanism: whenever someone found an extraordinary confluence of resources, such as a beached whale, they would use smoke signals to announce their find, bringing people together to share food and exchange different types of social capital. The model provides insight on how the spatial concentration of beachings and agents' movements in the space can influence cooperation. We conclude that the emergence of informal and dynamic communities that operate as a vigilance network preserves cooperation and makes defection very costly.

No MeSH data available.


Average cooperation and importance of social capital.Row of plots of the average cooperation <c> as a function of vision v for different levels of importance of social capital θ, when the spatial distribution of beached whales is uniform in the space and the agents’ movement is a random walk. The maximum standard error of the average of cooperation of all experiments represented in the plots is 0.056.
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pone.0121888.g006: Average cooperation and importance of social capital.Row of plots of the average cooperation <c> as a function of vision v for different levels of importance of social capital θ, when the spatial distribution of beached whales is uniform in the space and the agents’ movement is a random walk. The maximum standard error of the average of cooperation of all experiments represented in the plots is 0.056.

Mentions: Fig 6 shows the results of a set of experiments carried out to study reciprocity under different scenarios of the frequency of beachings (Pbw)and the visibility of these events (v). An exhaustive analysis is described in Briz et al [12]. In this paper we replicate these results and summarise those that appear to be most relevant for the rest of this work.


Effect of resource spatial correlation and hunter-fisher-gatherer mobility on social cooperation in Tierra del Fuego.

Santos JI, Pereda M, Zurro D, Álvarez M, Caro J, Galán JM, Briz i Godino I - PLoS ONE (2015)

Average cooperation and importance of social capital.Row of plots of the average cooperation <c> as a function of vision v for different levels of importance of social capital θ, when the spatial distribution of beached whales is uniform in the space and the agents’ movement is a random walk. The maximum standard error of the average of cooperation of all experiments represented in the plots is 0.056.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4390331&req=5

pone.0121888.g006: Average cooperation and importance of social capital.Row of plots of the average cooperation <c> as a function of vision v for different levels of importance of social capital θ, when the spatial distribution of beached whales is uniform in the space and the agents’ movement is a random walk. The maximum standard error of the average of cooperation of all experiments represented in the plots is 0.056.
Mentions: Fig 6 shows the results of a set of experiments carried out to study reciprocity under different scenarios of the frequency of beachings (Pbw)and the visibility of these events (v). An exhaustive analysis is described in Briz et al [12]. In this paper we replicate these results and summarise those that appear to be most relevant for the rest of this work.

Bottom Line: According to ethnographic sources, the Yamana developed cooperative behaviour supported by an indirect reciprocity mechanism: whenever someone found an extraordinary confluence of resources, such as a beached whale, they would use smoke signals to announce their find, bringing people together to share food and exchange different types of social capital.The model provides insight on how the spatial concentration of beachings and agents' movements in the space can influence cooperation.We conclude that the emergence of informal and dynamic communities that operate as a vigilance network preserves cooperation and makes defection very costly.

View Article: PubMed Central - PubMed

Affiliation: INSISOC, Universidad de Burgos, Escuela Politécnica Superior, Edif. "La Milanera", Burgos, Spain.

ABSTRACT
This article presents an agent-based model designed to explore the development of cooperation in hunter-fisher-gatherer societies that face a dilemma of sharing an unpredictable resource that is randomly distributed in space. The model is a stylised abstraction of the Yamana society, which inhabited the channels and islands of the southernmost part of Tierra del Fuego (Argentina-Chile). According to ethnographic sources, the Yamana developed cooperative behaviour supported by an indirect reciprocity mechanism: whenever someone found an extraordinary confluence of resources, such as a beached whale, they would use smoke signals to announce their find, bringing people together to share food and exchange different types of social capital. The model provides insight on how the spatial concentration of beachings and agents' movements in the space can influence cooperation. We conclude that the emergence of informal and dynamic communities that operate as a vigilance network preserves cooperation and makes defection very costly.

No MeSH data available.