Woodbury Nathan, Gries Gerhard
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
J Chem Ecol. 2007 Jul;33(7):1351-8. doi: 10.1007/s10886-007-9303-4.
Aggregations of the common silverfish, Lepisma saccharina, and giant silverfish, Ctenolepisma longicaudata (both Thysanura: Lepismatidae), are mediated by species-specific pheromones. In dual-choice, still-air olfactometer experiments, filter paper previously exposed to 12 male, female, or juvenile L. saccharina or C. longicaudata arrested conspecifics regardless of developmental stage or sex. Arrestment responses required physical contact with the pheromone. Insect-derived frass, scales, antennae, and setae, as well as salivary gland content, are not the source of the contact pheromone in L. saccharina. Lepisma saccharina did not respond to the pheromone of C. longicaudata, nor to that of another thysanuran, the firebrat Thermobia domestica. However, C. longicaudata responded to pheromones of both L. saccharina and T domestica, whereas T. domestica responded to the C. longicaudata but not L. saccharina pheromone. These results support the hypothesis that a closer phylogenetic relationship exists between C. longicaudata and T domestica than between C. longicaudata and L. saccharina, but a definitive conclusion must await molecular genetic analyses of all three species.
常见衣鱼（Lepisma saccharina）和大衣鱼（Ctenolepisma longicaudata，均属缨尾目：衣鱼科）的聚集是由物种特异性信息素介导的。在双选、静止空气嗅觉仪实验中，先前接触过12只雄性、雌性或幼年L. saccharina或C. longicaudata的滤纸会吸引同种个体，无论其发育阶段或性别如何。吸引反应需要与信息素进行物理接触。昆虫产生的粪便、鳞片、触角和刚毛，以及唾液腺分泌物，都不是L. saccharina中接触性信息素的来源。L. saccharina对C. longicaudata的信息素没有反应，对另一种缨尾目昆虫——家衣鱼（Thermobiam domestica）的信息素也没有反应。然而，C. longicaudata对L. saccharina和T. domestica的信息素都有反应，而T. domestica对C. longicaudata的信息素有反应，但对L. saccharina的信息素没有反应。这些结果支持了这样一种假设，即C. longicaudata与T. domestica之间的系统发育关系比C. longicaudata与L. saccharina之间的更密切，但最终结论必须等待对这三个物种进行分子遗传分析。
