The transfer of food between adults is uncommon in primates. Although golden lion tamarins ( Leontopithecus rosalia ) are unique among primates in the extent to which they transfer food, reports of food transfers between adults have so far been restricted to captive or reintroduced individuals. Here, I report the first recorded events of adult–adult food transfers in golden lion tamarins between individuals belonging to different groups in the wild. Given that individuals emigrate from their natal group to find reproductive opportunities, I suggest that intergroup food transfers could be a way for individuals to estimate the quality or availability of potential mates or social partners. I propose an additional function of food transfers in wild golden lion tamarins: that they create and strengthen social bonds with individuals outside of the family group.

中文翻译：

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野生金狮狨猴（Leontopithecus rosalia）的群间食物转移


在灵长类动物中，成年动物之间的食物转移并不常见。尽管金狮面狨（Leontopithecus rosalia）在灵长类动物中转移食物的程度是独一无二的，但迄今为止有关成体之间食物转移的报道仅限于圈养或重新引入的个体。在这里，我报告了首次有记录的野生金狮狨猴中属于不同群体的个体之间的成体-成体食物转移事件。鉴于个体从出生群体中迁移出来寻找繁殖机会，我认为群体间食物转移可能是个体评估潜在配偶或社会伙伴的质量或可用性的一种方式。我提出野生金狮狨猴食物转移的另一个功能：它们与家庭群体之外的个体建立并加强社会联系。