Reservation food sharing among the Ache of Paraguay.

From Forest to Reservation: Transitions in Food-Sharing Behavior among the Ache of Paraguay

Reciprocal altruism, rather than kin selection, maintains nepotistic food transfers on an Ache reservation ¬リニ

Cooperation among relatives is often regarded as evidence of kin selection. Yet altruism not requiring shared genes can also evolve among relatives. If characteristics of relatives (such as proximity, familiarity, or trust) make kin preferred social partners, the primary causes of nepotistic biases may reside principally in direct fitness payoffs from cooperation rather than indirect fitness pa...

Men's Time Allocation to Subsistence Work among the Ache of Eastern Paraguay

Quantitative data on men's time allocation among the Ache o f Paraguay are presented. The data indicate that Ache men work almost 7 "hours daily in direct food acquisition, which is the major daily activity. The amount o f time Ache men work is compared with the amount reported for other modern hunter-gatherers and tribal horticulturalists. The characterization z~f huntergatherers as the "origi...

The Evolution of Contingent Cooperation

Reciprocal altruism has been proposed as a foundation of cooperation in humans. The core feature of reciprocity is the contingent relationship between acts of giving and receiving among social partners. However, contingency has remained largely an elusive concept with little empirical scrutiny. Food sharing in small-scale, nonmarket societies is a classic context for examining conditional coope...

Research on the Innovation of Business Ecosystem Model in China's 0nline Food Reservation Market at Sharing Economic Era

At the sharing economy era, the online food reservation market has experienced great changes, such as the mobilization of ordering,cooperation of logistics , diversification of revenue stream. The ordering patterns has also changed from network order to improve user experience. At present, online food reservation market has difficulties inquickly dealing with the impacts and challenges bought b...