期刊
ETHOLOGY
卷 118, 期 5, 页码 423-430出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1439-0310.2012.02027.x
关键词
-
资金
- New Zealand Marsden Fund
According to life-history theory, the duration of extended parental feeding is determined by the costs and benefits of maximising reproductive success. Therefore, the length of regular parental provisioning should be correlated with the time required for juveniles to acquire the skills that they need to be independent. The relatively few cases of extremely prolonged parental feeding in both land and sea birds appear to be consistent with this prediction because they are associated with learning-intensive foraging techniques. New Caledonian crows have the most intricate tool manufacture techniques amongst non-human animals and juveniles take over 1 yr to reach adult-like proficiency in their tool skills. We investigated the prediction that this species also should have prolonged parental provisioning. We found that these crows have one of the longest known periods of regular extended parental provisioning in birds. Some parents regularly fed juveniles for up to 10 mo post-fledging. Humans also stand out amongst primates because of their learning-intensive foraging strategies and an extended period of juvenile dependence. The independently evolved association between a relatively high level of technological skill in foraging and prolonged juvenile provisioning in both humans and New Caledonian crows raises the possibility that these two characteristics might be causally related.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据