Head-plug defense in a gall aphid
Head-plug defense in a gall aphid
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DOI：
10.1007/s00040-005-0839-4
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发表时间：
2006-02-01
期刊：
影响因子：
1.3
通讯作者：
Aoki, S
中科院分区：
文献类型：
--
作者：
Kurosu, U;Narukawa, J;Aoki, S
在泰国北部，蚜虫astergopteryx sp.在Styrax benzoides上形成一个香蕉束状的瘿，由几个亚瘿组成，并在树上完成其生命周期，而不迁移到次生寄主植物。我们发现它的士兵有硬化的，突出的头部，有许多刺状的刚毛，几个士兵合作用这些头塞住胆下的开口。在现场检查的173个口中，90.8%的口被堵住了，守卫士兵之间没有空间。许多卵和性鱼被发现在士兵守卫的子胆内，并且发现许多雄性鱼试图侵入这些子胆。然而，他们被守卫的士兵封锁了，对他们来说，要进入地下洞穴并不是一件容易的事。一些从地下冲出来的士兵也是如此。守卫的士兵经常阻止外面的士兵回到地下。这些发现表明了一种有趣的可能性，即守卫士兵可能因此选择仍然活跃、可重复使用的士兵和强壮的男性作为其下胆的性女性。
The aphid Astegopteryx sp. forms a banana-bunch shaped gall consisting of several subgalls on Styrax benzoides in northern Thailand, and completes its life cycle on the tree, without migrating to secondary hostplants. We found that its soldiers had sclerotic, protruded heads with many spine-like setae, and that several soldiers cooperate to plug the ostiole of the subgall with these heads. Of 173 ostioles examined in the field, 90.8 % were plugged with no space among the guarding soldiers. Many eggs and sexuals were found within subgalls guarded by soldiers, and a number of males were found trying to intrude into these subgalls. However, they were blocked by guarding soldiers, and it was no easy task for them to intrude into subgalls. The same was true for some soldiers that had rushed out of the subgall. Guarding soldiers often prevented outside soldiers from coming back into the subgall. These findings suggest an interesting possibility that guarding soldiers might consequently select still active, reusable soldiers and strong males for sexual females in their subgall.