Lateralisation of trunk movements in captive Asian elephants (Elephas maximus)
Lateralisation of trunk movements in captive Asian elephants (Elephas maximus)
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DOI：
10.1080/13576500802572442
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发表时间：
2009-01-01
期刊：
影响因子：
1.4
通讯作者：
Semple, Stuart
中科院分区：
文献类型：
--
作者：
Haakonsson, Jane Ebert;Semple, Stuart
行为偏侧化在脊椎动物中得到了广泛的研究。这一领域的大多数研究都集中在成对器官（如手、四肢和眼睛）的偏侧性。很少有研究探索未配对器官（如尾巴或躯干）的侧偏好。我们调查了圈养亚洲象（Elephas maximus）的躯干使用偏侧性，量化了四种不同的躯干运动：进食，喷沙，自我触摸和摆动的侧偏好。我们发现证据显着的侧偏好在所有四个运动类别。侧偏好的发生和方向的变化被认为是在个人内部和之间，但没有整体人口水平的侧偏被认为是任何的四个躯干运动。躯干使用的侧偏好强度在取食时显著高于自触和摆动。这项研究增加了非常有限的数据，在不成对的器官，更具体地说，大象的鼻子。此外，它提供了新的信息，在躯干使用的方向偏侧化在一系列功能不同的情况下。
Behavioural lateralisation has been widely investigated in vertebrates. Most studies in this area have focused on laterality in paired organs such as hands, limbs, and eyes. Fewer studies have explored side preferences in unpaired organs such as tails or trunks. We investigated laterality of trunk use among captive Asian elephants (Elephas maximus), quantifying side preference in four different trunk movements: feeding, sand spraying, self-touching, and swinging. We found evidence for significant side preference in all four movement categories. Variation in the occurrence and direction of side preference was seen both within and between individuals but no overall population-level side bias was seen for any of the four trunk movements. The strength of side preference in trunk use was significantly higher for feeding than for self-touching and swinging. This study adds to the very limited data on laterality in unpaired organs generally, and elephants' trunks more specifically. In addition it provides novel information about directional lateralisation in trunk use across a range of functionally distinct contexts.