Experimental evidence of large-scale unicoloniality in the tramp ant Wasmannia auropunctata (Roger)
Experimental evidence of large-scale unicoloniality in the tramp ant Wasmannia auropunctata (Roger)
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DOI：
10.1023/b:joir.0000028575.28700.71
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发表时间：
2004-03-01
影响因子：
1
通讯作者：
Jourdan, H
中科院分区：
文献类型：
--
作者：
Le Breton, J;Delabie, JHC;Jourdan, H
我们研究了 Wasmannia auropunctata (Roger) 的种内群体攻击性，这是一种起源于新热带地区的流浪物种。通过观察一对一对抗的结果，我们比较了来自六个新喀里多尼亚地点（引入范围）和四个巴西可可种植园（原始范围）的工人的行为反应。我们记录了个体间的“攻击性”行为，分为四个级别，从没有攻击性反应的身体接触到长时间的攻击性，包括被一只或两只蚂蚁蜇伤。在巴西，我们经常观察到来自遥远地区的种群之间存在高度的种内攻击性，这表明金斑马鱼在其本土范围内可能表现为多群体物种。在新喀里多尼亚，配对遭遇导致低竞争行为，如缺乏“全面攻击”（包括被一个或两个对手蜇伤）所表明的那样。我们的研究结果表明，W. auropunctata 在整个新喀里多尼亚表现为单一超级群体，并且其单群体性（具有相互连接的巢穴的广泛群体，来自遥远地区的工蚁之间没有攻击性）的规模在引入群体和本地群体中是不同的。根据目前的研究，本地和引进的金斑蝽种群之间种内攻击性的差异似乎有助于其成功入侵。
We examined intraspecific colonial aggressiveness in Wasmannia auropunctata ( Roger), a tramp species originating from the neotropics. By observing the results of one-on-one confrontations, we compared the behavioral responses of workers originating from six New Caledonian locations ( introduced range) and four Brazilian cocoa plantations ( original range). We recorded interindividual "aggressive" behavior on four levels ranging from physical contact, with no aggressive response, to prolonged aggressiveness, including stinging by one or both ants. In Brazil, we often observed high intraspecific aggressiveness between populations originating from distant locations, indicating that W. auropunctata may behave as a multicolonial species in its native range. In New Caledonia, paired encounters resulted in low agonistic behavior, as shown by the absence of "full attacks" (which include stinging by one or both opponents). Our results suggest that W. auropunctata behaves as a single supercolony throughout New Caledonia and that the scale of its unicoloniality ( widespread colonies with interconnected nests without aggressiveness between workers originating from distant areas) is different in introduced and native populations. According to the present study, it seems likely that differences in intraspecific aggressiveness between native and introduced populations of W. auropunctata contribute to its invasive success.