Cooperative Foraging and Food Sharing: Ifaluk Atoll

Project summary: This project is aimed at understanding cooperative foraging decisions among men of Ifaluk Atoll, Federated States of Micronesia. Data collection included time allocation, food sharing, and fishing return rate data. The data were used to examine hypotheses derived from optimal foraging theory (patch choice models) and related theories (bargaining theory, costly signaling theory) about the fishing decisions of Ifaluk men.


Funding: L.S.B. Leakey Foundation, National Science Foundation, University of New Mexico.



2005 Sosis, Richard Ifaluk Atoll: An Ethnographic Account, in eHRAF World Cultures, ed. Carol Ember. New Haven, CT: HRAF.
2004 Sosis, Richard Insights from Ifaluk: Food Sharing Among Cooperative Fishers Behavioral and Brain Sciences 27: 568-569.
2002 Sosis, Richard Patch Choice Decisions on Ifaluk Atoll. American Anthropologist 104: 583-598.
2002 Sosis, Richard Comment for Rousseau’s whale hunt? Coordination among big-game hunters. Current Anthropology: 43:553-554.
2001 Sosis, Richard Sharing, consumption, and patch choice on Ifaluk Atoll. Human Nature 12:221-245.
2000 Sosis, Richard The emergence and stability of cooperative fishing on Ifaluk Atoll, in Human Behavior and Adaptation: an Anthropological Perspective, eds. L. Cronk, N. Chagnon, and B. Irons, pp. 437–472, New York: Aldine de Gruyter..
2000 Sosis, Richard Costly signaling and torch fishing on Ifaluk Atoll. Evolution and Human Behavior 21: 223-244.
1998 Sosis, Richard, Sharon Feldstein, and Kim Hill Bargaining theory and cooperative fishing participation on Ifaluk Atoll. Human Nature 9: 163-203.
1997 Sosis, Richard and Kim Hill Comment for Delayed reciprocity and tolerated theft: the behavioral ecology of food-sharing strategies. Current Anthropology 38: 73-74.
1997 Sosis, Richard and Kim Hill Comment for Consumption and production: sharing and the social construction of use-value. Current Anthropology 38: 42-43.

Ifaluk Images