Skimming behaviour and spreading potential of Stenus species and Dianous coerulescens (Coleoptera: Staphylinidae)
Skimming behaviour and spreading potential of Stenus species and Dianous coerulescens (Coleoptera: Staphylinidae)
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DOI：
10.1007/s00114-012-0975-4
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发表时间：
2012-11-01
影响因子：
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通讯作者：
Dettner, Konrad
中科院分区：
文献类型：
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作者：
Lang, Carolin;Seifert, Karlheinz;Dettner, Konrad
Stenus Latreille属和Dianous Leach属的Rove甲虫具有包含哌啶和吡啶衍生的生物碱以及几种萜烯的多功能分泌物的臀腺。这种分泌物的一个重要特征是其不同化合物的扩散潜力，stenusine、norstenusine、3-（2-甲基-1-丁烯基）吡啶、cicindeloine、α-蒎烯、1，8-桉叶素和6-甲基-5-庚烯-2-酮。个体分泌物的组成使甲虫能够快速地掠过水面，即使只有少量的分泌物被排出。几种Stenus的行为学调查显示，撇脂能力，撇脂速度和撇脂行为之间的Stenus物种不同。这些差异可能与不同的栖息地要求和分泌物保存机制有关。通过使用悬滴法的张力计测量，可以建立所有分泌物组分以及一些天然相同的甲虫分泌物在水面上的扩散压力。化合物3-（2-甲基-1-丁烯基）吡啶优于stenusine，据信迄今为止主要负责与其表面活性有关的撇除。天然相同的分泌物不受关于扩散潜力的单一化合物的协同效应的影响。此外，进化方面的Steninae的臀腺分泌进行了讨论。
Rove beetles of the genus Stenus Latreille and the genus Dianous Leach possess pygidial glands containing a multifunctional secretion of piperidine and pyridine-derived alkaloids as well as several terpenes. One important character of this secretion is the spreading potential of its different compounds, stenusine, norstenusine, 3-(2-methyl-1-butenyl)pyridine, cicindeloine, alpha-pinene, 1,8-cineole and 6-methyl-5-heptene-2-one. The individual secretion composition enables the beetles to skim rapidly and far over the water surface, even when just a small amount of secretion is emitted. Ethological investigations of several Stenus species revealed that the skimming ability, skimming velocity and the skimming behaviour differ between the Stenus species. These differences can be linked to varied habitat claims and secretion saving mechanisms. By means of tensiometer measurements using the pendant drop method, the spreading pressure of all secretion constituents as well as some naturally identical beetle secretions on the water surface could be established. The compound 3-(2-methyl-1-butenyl)pyridine excelled stenusine believed to date to be mainly responsible for skimming relating to its surface activity. The naturally identical secretions are not subject to synergistic effects of the single compounds concerning the spreading potential. Furthermore, evolutionary aspects of the Steninae's pygidial gland secretion are discussed.