Hart Andrew, Begon Michael
Department of Zoology, University of Liverpool, L69 3Bx, Liverpool, UK.
Oecologia. 1982 Jan;52(1):37-42. doi: 10.1007/BF00349009.
Populations of the rough winkle, Littorina rudis from two spatially-adjacent but distinct habitats have been compared in terms of reproductive effort, size at maturity and embryo size and number. In each case, the basis for the comparison has been examined critically. The suites of characteristics exhibited by the two populations do not fit the conventional 'r-K' scheme which has come to dominate life-history theory.Specifically, individuals in a 'boulders' population make a smaller reproductive effort, delay maturity longer and produce more numerous, smaller young than individuals in a 'crevice' population.The effects in the two populations of various environmental factors on shell thickness, animal size and these three life-history traits are examined and discussed. These factors adequately explain the characteristics exhibited by the populations. It is argued that the conventional scheme is inadequate in that it fails to take such specific effects into account.
对来自两个空间相邻但不同栖息地的粗糙滨螺（Littorina rudis）种群，在繁殖投入、成熟时的大小、胚胎大小和数量方面进行了比较。在每种情况下，都对比较的依据进行了严格审查。这两个种群所表现出的一系列特征并不符合已主导生活史理论的传统“r - K”模式。具体而言，与“裂缝”种群中的个体相比，“巨石”种群中的个体繁殖投入较小，成熟延迟时间更长，且产出数量更多、个体更小的幼体。研究并讨论了各种环境因素对这两个种群的壳厚度、动物大小以及这三个生活史特征的影响。这些因素充分解释了种群所表现出的特征。有人认为传统模式存在不足，因为它没有考虑到此类具体影响。
