Consequences of the instar stage for behavior in a pit-building antlion
Consequences of the instar stage for behavior in a pit-building antlion
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DOI：
10.1016/j.beproc.2013.11.009
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发表时间：
2014-03-01
影响因子：
1.3
通讯作者：
Scharf, Inon
中科院分区：
文献类型：
--
作者：
Alcalay, Yehonatan;Barkae, Erez David;Scharf, Inon
蚁狮幼虫是机会主义的捕食者，在松散的土壤中挖掘圆锥形的坑，捕食落入陷阱的小型节肢动物。我们调查了不同的行为特征的第二和第三龄幼虫选择相似的身体质量，同时也探讨了行为的一致性和个性的第三龄阶段。二龄幼虫比三龄幼虫建造更小的坑。前者对猎物的反应也更慢，利用猎物的效率也更低。值得注意的是，所有这些基于龄期的差异消失后，蜕皮到第三龄阶段。此外，三龄幼虫表现出一致的行为，在他们的坑大小，响应时间猎物和搬迁距离较小的程度。我们检测到两个行为轴。第一轴包括坑的大小，响应时间和猎物的开发效率之间的相关性，从而反映了在觅食活动的投资。第二个轴似乎代表了反应时间和迁移距离之间的权衡，这意味着对猎物反应较慢的个体迁移到更远的距离。这些结果表明，协调的行为反映了不同水平的投资觅食，同时也强调了重要性的龄期阶段，除了身体质量，当研究这种生物体的行为特点是一个复杂的生命周期。(C)2013爱思唯尔有限公司版权所有。
Pit-building antlion larvae are opportunistic predators that dig conical pits in loose soils, and prey on small arthropods that fall into their traps. We investigated different behavioral traits of second and third instar larvae selected for similar body masses, while also exploring the behavioral consistency and personalities of the third instar stage. Second instar larvae constructed smaller pits than third instar larvae. The former also responded more slowly to prey and exploited prey less efficiently. Notably, all these instar-based differences disappeared after molting into the third instar stage. In addition, third instar larvae exhibited consistent behavior in their pit size, response times to prey and to less extent in relocation distances. We detected two axes of behavior. The first axis included a correlation between pit size, response time and prey exploitation efficiency, thus reflecting investment in foraging activity. The second axis seemed to represent a trade-off between response time and relocation distance, implying that individuals that responded more slowly to prey, relocated over larger distances. These results point to coordinated behavior reflecting different levels of investment in foraging, while also emphasizing the importance of instar stage, in addition to body mass, when studying the behavior of such organisms characterized by a complex life cycle. (C) 2013 Elsevier B.V. All rights reserved.