Lamb R J, MacKay P A, Gerber G H
Agriculture Canada Research Station, 195 Dafoe Road, R3T 2M9, Winnipeg, Manitoba, Canada.
Department of Entomology, University of Manitoba, R3T 2N2, Winnipeg, Manitoba, Canada.
Oecologia. 1987 May;72(2):170-177. doi: 10.1007/BF00379263.
Developmental rate and adult weight were studied at constant temperatures from 9.8 to 27.9°C for 18 clones from each of five populations of the pea aphid, Acyrthosiphon pisum (Harris), from locations between 39 and 53°N latitude in central North America. The response of developmental rate to temperature for each clone was accurately described by a three parameter non-linear equation. Adult weight usually decreased with increasing rearing temperature, but the shape of the response to temperature varied among clones. Variation in the developmental parameters was greater among clones within populations than among populations. No consistent trends were observed in the developmental parameters or adult weights either with latitude or the long term average temperatures at the locations. We conclude that previously reported geographic variation in the developmental threshold of this species, which was attributed to local adaptation, occurred either because the clones tested were not representative of the populations or because rearing methods differed among studies. The results are discussed in relation to the hypothesis that life history traits which are temperature sensitive are adapted to local thermal environments.
在恒定温度9.8至27.9°C下，对来自北美中部北纬39至53°之间五个地点的豌豆蚜（Acyrthosiphon pisum (Harris)）的五个种群中的18个克隆进行了发育速率和成虫体重研究。每个克隆的发育速率对温度的响应通过一个三参数非线性方程得到准确描述。成虫体重通常随着饲养温度的升高而降低，但对温度响应的形状在不同克隆间有所不同。种群内克隆间发育参数的变异大于种群间的变异。在发育参数或成虫体重方面，未观察到随纬度或各地点长期平均温度的一致趋势。我们得出结论，先前报道的该物种发育阈值的地理变异，其被归因于局部适应，要么是因为所测试的克隆不代表种群，要么是因为不同研究间的饲养方法不同。结合温度敏感的生活史特征适应局部热环境这一假设对结果进行了讨论。
