Thomas C D, Ng D, Singer M C, Mallet J L B, Parmesan C, Billington H L
Department of Zoology, University of Texas, Austin, TX, 78712.
Evolution. 1987 Jul;41(4):892-901. doi: 10.1111/j.1558-5646.1987.tb05862.x.
Populations of the butterfly Euphydryas editha living within a 30 times 100-km region on the eastern slope of the Sierra Nevada range were compared for oviposition preference and ability of larvae to grow and survive on two host plants, Collinsia parviflora and Plantago lanceolata. Since its introduction approximately 100 years ago, P. lanceolata has been incorporated in the diet of E. editha in one of the study populations. The populations differed in oviposition preference; only the population that uses P. lanceolata contains some individuals that prefer P. lanceolata. Larvae from two populations, one using both P. lanceolata and C. parviflora, the other using only C. parviflora, were not found to differ in relative abilities to grow or survive on P. lanceolata. The potential for E. editha to use P. lanceolata appears in populations that have had no prior exposure to this plant, while oviposition preference for this plant has evolved in the population in which the plant now grows.
对生活在内华达山脉东坡一个30×100公里区域内的 Edith's 凤蝶种群进行了比较，研究其在两种寄主植物——小花柯林斯草和长叶车前草上的产卵偏好以及幼虫生长和存活的能力。自大约100年前引入以来，长叶车前草已被纳入其中一个研究种群的 Edith's 凤蝶的食物中。这些种群在产卵偏好上存在差异；只有使用长叶车前草的种群中有一些个体更喜欢长叶车前草。来自两个种群的幼虫，一个种群同时使用长叶车前草和小花柯林斯草，另一个种群只使用小花柯林斯草，在以长叶车前草为食时，它们的相对生长或存活能力没有差异。Edith's 凤蝶利用长叶车前草的潜力出现在之前没有接触过这种植物的种群中，而对这种植物的产卵偏好则在该植物现在生长的种群中进化而来。
