进化与人类行为2013-09-05 2:58 AM

Evidence of traditional knowledge loss among a contemporary indigenous society

As biological and linguistic diversity, the world’s cultural diversity is on decline. However, to date there are no estimates of the rate at which the specific cultural traits of a group disappear, mainly because we lack empirical data to assess how the cultural traits of a given population change over time. Here we estimate changes in cultural traits associated to the traditional knowledge of wild plant uses among an Amazonian indigenous society. We collected data among 1151 Tsimane’ Amerindians at two periods of time. Results show that between 2000 and 2009, Tsimane’ adults experienced a net decrease in the report of plant uses ranging from 9% (for the female subsample) to 26% (for the subsample of people living close to towns), equivalent to 1% to 3% per year. Results from a Monte Carlo simulation show that the observed changes were not the result of randomness. Changes were more acute for men than for women and for informants living in villages close to market towns than for informants settled in remote villages. The Tsimane’ could be abandoning their traditional knowledge as they perceive that this form of knowledge does not equip them well to deal with the new socio-economic and cultural conditions they face nowadays.

KEYWORDS

SHARE & LIKE

COMMENTS

ABOUT THE AUTHOR

进化与人类行为

0 Following 2 Fans 0 Projects 27 Articles

SIMILAR ARTICLES

A deep voice is evolutionarily advantageous for males, but does it confer benefit in competition for leadership positions? We study ecologically valid

Read More

A deep voice is evolutionarily advantageous for males, but does it confer benefit in competition for leadership positions? We study ecologically valid

Read More

As biological and linguistic diversity, the world’s cultural diversity is on decline. However, to date there are no estimates of the rate at which the

Read More

As biological and linguistic diversity, the world’s cultural diversity is on decline. However, to date there are no estimates of the rate at which the

Read More

Abstract Evolutionary theory predicts that observable traits should evolve to reliably indicate unobservable behavioral tendencies in coordination ga

Read More

Abstract Evolutionary theory predicts that observable traits should evolve to reliably indicate unobservable behavioral tendencies in coordination ga

Read More

Parental care and alloparental care are major evolutionary dimensions of the biobehavioral repertoire of many species, including human beings. Despite

Read More

Parental care and alloparental care are major evolutionary dimensions of the biobehavioral repertoire of many species, including human beings. Despite

Read More

The purpose of this study was to test the influence of hormonal contraceptive use on levels of female intrasexual competition. Twenty-eight women compl

Read More

The purpose of this study was to test the influence of hormonal contraceptive use on levels of female intrasexual competition. Twenty-eight women compl

Read More