Institute of Zoology, University of Regensburg, D-8400, Regensburg, FRG.
J Chem Ecol. 1985 Feb;11(2):137-48. doi: 10.1007/BF00988196.
Female sex pheromones ofPeriplaneta americana, P. australasiae, andBlatta orientalis elicit locomotion and upwind orientation in conspecific males. Interspecific attraction between these species was observed in a wind tunnel assay for most species combinations, with the exception ofP. australasiae males not being attracted toP americana females. The role of twoP. americana sex pheromone components, periplanone-A (PA) and periplanone-B (PB) in male attraction was analyzed. PA induced locomotion in males of all three species, with highest threshold concentration inP. americana. PB was effective inP. americana andB. orientalis, but not inP. australasiae. Experiments with mixtures of both components confirmed an inhibitory influence of PB onP. australasiae males when it was added to PA in a ratio of 3∶1 or higher. SinceP. americana andP. australasiae have been found to be syntopous, and their daily mating periods overlap, the female sex pheromone ofP. americana is discussed as an isolating factor between both species.
美洲大蠊、澳洲大蠊和东方蜚蠊的雌性信息素可引起同种雄性的运动和顺风定向。在风洞试验中观察到这些物种之间存在种间吸引力，除了澳洲大蠊雄性不会被美洲大蠊雌性吸引。分析了两种美洲大蠊性信息素成分（PA 和 PB）对雄性吸引力的作用。PA 诱导三种物种的雄性运动，在美洲大蠊中具有最高的阈值浓度。PB 在美洲大蠊和东方蜚蠊中有效，但在澳洲大蠊中无效。用两种成分的混合物进行的实验证实，当 PB 以 3∶1 或更高的比例添加到 PA 中时，对澳洲大蠊雄性有抑制作用。由于美洲大蠊和澳洲大蠊被发现是同域的，并且它们的日常交配期重叠，因此讨论了美洲大蠊的雌性信息素作为这两个物种之间的隔离因素。
