Roff Derek
Research and Resource Services, Department of Fisheries and Oceans, P. O. Box 5667, A1C 5X1, St. John's, Newfoundland.
Oecologia. 1980 May;45(2):202-208. doi: 10.1007/BF00346461.
This paper explores the problem of adapting development time to changes in the length of time conditions are favourable for growth and reproduction ('season length'). It is shown that systematic changes in season length along some gradient such as latitude can generate either simple clines in development time or 'saw-tooth' clines. The relationship between development time and body size gives rise to a corresponding variation in body size. The generation of a 'saw-tooth' cline does not require sharp environmental changes. Both types of clinal variation are observed in insects.
本文探讨了使发育时间适应有利于生长和繁殖的时间长度（“季节长度”）变化的问题。研究表明，沿着诸如纬度等梯度的季节长度的系统性变化可以产生发育时间的简单渐变群或“锯齿状”渐变群。发育时间与体型之间的关系导致了体型的相应变化。“锯齿状”渐变群的产生并不需要剧烈的环境变化。这两种渐变群变化在昆虫中都有观察到。
