Expanding the ‘enemy-free space’ for oribatid mites: evidence for chemical defense of juvenile Archegozetes longisetosus against the rove beetle Stenus juno
Expanding the ‘enemy-free space’ for oribatid mites: evidence for chemical defense of juvenile Archegozetes longisetosus against the rove beetle Stenus juno
复制标题
扩大 oribatid 螨的“无敌空间”：幼年 Archegozetes longisetosus 对抗罗夫甲虫 Stenus juno 的化学防御证据
DOI：
10.1007/s10493-011-9501-1
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发表时间：
2012
影响因子：
2.2
通讯作者：
Raspotnig
中科院分区：
文献类型：
--
作者：
Heethoff;Raspotnig
由于多种形态和化学防御策略，成年甲螨被认为在“无敌人空间”中生活。然而，大多数幼兽甲螨缺乏硬化的角质层，因此被认为处于更强的捕食压力下。另一方面，大多数甲虫在发育的各个阶段都有外分泌油腺，这可能使化学防御成为甲虫幼虫的关键生存策略。我们对模型甲虫miteArchegozetes longisetosuss的三剑虫进行了处理，使其完全排出油腺，并将这些化学解除的标本提供给多食的叶甲虫stenus juno。解除武装的标本很容易被吃掉。相比之下，充满油腺的标本受到了明显的保护，被甲虫拒绝。这是第一个直接的证据，证明油腺分泌物为软体甲壳虫幼虫提供化学保护，以抵御大型节肢动物捕食者。
Adult oribatid mites are thought to live functionally in ‘enemy-free space’ due to numerous morphological and chemical defensive strategies. Most juvenile oribatid mites, however, lack hardened cuticles and are thus thought to be under stronger predation pressure. On the other hand, the majority of oribatids have exocrine oil glands in all developmental stages, possibly rendering chemical defense the crucial survival strategy in juvenile Oribatida. We manipulated tritonymphs of the model oribatid miteArchegozetes longisetosusto completely discharge their oil glands and offered these chemically disarmed specimens to the polyphagous rove beetleStenus juno. Disarmed specimens were easily consumed. By contrast, specimens with filled oil glands were significantly protected, being rejected by the beetles. This is the first direct evidence that oil gland secretions provide soft-bodied juvenile oribatids with chemical protection against large arthropod predators.