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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.


Snapshot of a 201x201 patch environment.Blue cells represent water, yellow represent beach and brown stands for land.
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pone.0121888.g001: Snapshot of a 201x201 patch environment.Blue cells represent water, yellow represent beach and brown stands for land.

Mentions: The environment is defined by a square grid of MxM cells, i.e. patches. Patches can represent beach, water or land (Fig 1). The number of beach patches is determined by the parameter beach-density, i.e. the fraction of beach patches, while the fraction (1- beach-density) of patches is equally divided between water and land. To create a spatial distribution closer to a real scenario, instead of dividing the landscape into simply randomly chosen beach, land and water patches, we created processes to scatter the land and beach patches over the water landscape. After scattering them, we classified the non-water patches into two categories: the land (the patches surrounding the starting point of the scattering process) and the beach (the patches further away).


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)

Snapshot of a 201x201 patch environment.Blue cells represent water, yellow represent beach and brown stands for land.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0121888.g001: Snapshot of a 201x201 patch environment.Blue cells represent water, yellow represent beach and brown stands for land.
Mentions: The environment is defined by a square grid of MxM cells, i.e. patches. Patches can represent beach, water or land (Fig 1). The number of beach patches is determined by the parameter beach-density, i.e. the fraction of beach patches, while the fraction (1- beach-density) of patches is equally divided between water and land. To create a spatial distribution closer to a real scenario, instead of dividing the landscape into simply randomly chosen beach, land and water patches, we created processes to scatter the land and beach patches over the water landscape. After scattering them, we classified the non-water patches into two categories: the land (the patches surrounding the starting point of the scattering process) and the beach (the patches further away).

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.