Snyder W E, Hurd L E
Ecology Program, School of Life Sciences, University of Delaware, 19716, Newark, DE, USA.
Department of Entomology and Applied Ecology, University of Delaware, 19716, Newark, DE, USA.
Oecologia. 1995 Dec;104(4):496-500. doi: 10.1007/BF00341347.
Relative timing of egg hatch between two cooccurring, congeneric mantids, Tenodera angustipennis and T. sinensis, was experimentally manipulated in replicated field enclosures to test the importance of intraguild predation to survivorship and development of T. angustipennis. T. angustipennis is normally smaller than its congener because of later egg-hatch. Delaying introduction of T. sinensis relative to normal egg hatch phenology reduced mortality for T. angustipennis, but did not affect its rate of development. The results indicate that intraguild predation by normally earlierhatching T. sinensis can be an important factor in the early life history of T. angustipennis, but that interspecific competition is not a strong selective factor in developmental asynchrony between these two species.
在重复设置的野外围栏中，对两种同时出现的同属螳螂——广斧螳（Tenodera angustipennis）和中华大刀螳（T. sinensis）之间卵孵化的相对时间进行了实验操控，以测试种内捕食对广斧螳生存和发育的重要性。由于卵孵化较晚，广斧螳通常比其同属种类体型更小。相对于正常的卵孵化物候期，推迟中华大刀螳的引入降低了广斧螳的死亡率，但并未影响其发育速度。结果表明，通常较早孵化的中华大刀螳进行的种内捕食可能是广斧螳早期生活史中的一个重要因素，但种间竞争并非这两个物种发育异步的强大选择因素。
