Leaf-folding Behavior for Drinking Water by Wild Chimpanzees at Bossou, Guinea
Leaf-folding Behavior for Drinking Water by Wild Chimpanzees at Bossou, Guinea
复制标题
几内亚博苏野生黑猩猩饮水时的折叶行为
DOI：
10.2354/psj.10.307
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
T. Matsuzawa
中科院分区：
文献类型：
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作者：
Rikako Tonooka;N. Inoue;T. Matsuzawa
通过野外实验研究了野生黑猩猩利用树叶饮水的情况。先前的观察显示，几内亚博苏的黑猩猩用树叶当勺子或海绵喝水。除了在自然条件下记录树洞中使用的树叶外，我们还建立了一个户外实验室，用于观察和录像工具使用行为的行为过程。一个当地人使用的水容器被埋在室外实验室的地下。我们观察了3只黑猩猩的5个例子，其中树叶被用作饮水工具。观察揭示了第三种使用叶子的方法：黑猩猩在嘴里折叠一片叶子，就像折纸一样，然后把它放进容器里收集水。黑猩猩更喜欢使用一种特殊的叶子（Hybophryalgesbraunianum），一种宽，软，无毛的叶子，作为工具（28次中的21次）。叶子的高选择性和新发现的折叠方法显示了黑猩猩找到合适材料并将其改造成有用工具的能力。
Use of leaves for drinking water by wild chimpanzees was studied through a field experiment. Previous observations have revealed that the chimpanzees at Bossou, Guinea, drank water by using a leaf as a spoon or a sponge. In addition to recording the leaves used in a tree hollow under natural conditions, we set up an outdoor laboratory for observing and video-recording the behavioral processes of the tool-use behavior. A water container which was utilized by local people was buried in the ground of the outdoor laboratory. We observed 5 examples by 3 chimpanzees in which leaves were used as a drinking tool. The observation revealed a third method of using leaves: The chimpanzees folded a leaf in the mouth as in paper-folding and put it into the container for capturing water. The chimpanzees preferred to use a particular leaf (Hybophrynium braunianum), a wide, soft, and hairless leaf, as a tool (21 out of 28 episodes in total). The high selectivity of leaves and the newly-found folding method shows chimpanzees' ability to find a suitable material and modifying it into a useful tool.