Life history reaction norms to time constraints in a damselfly: differential effects on size and mass
Life history reaction norms to time constraints in a damselfly: differential effects on size and mass
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豆娘的生活史对时间限制的反应规范：对大小和质量的不同影响
DOI：
10.1111/j.1095-8312.2004.00379.x
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发表时间：
2004
影响因子：
1.9
通讯作者：
R. Stoks
中科院分区：
文献类型：
--
作者：
F. Strobbe;R. Stoks
最优模型预测，在时间限制下，生物应该加速发育，最好是通过提高生长速度，以保持出现时的大小不变。不幸的是，大多数测试确实忽略了遗传限制，并将质量与体型交换，这可能解释了对某些模型预测的混合支持。我们通过操纵白昼长度制度，对豆娘青花豆娘的完全兄弟幼虫施加时间限制。在时间限制下，幼虫的发育和以大小为基础的生长速度确实更快。这使得在出现时保持尺寸不变成为可能，尽管开发时间较短。有趣的是，在时间限制下，以质量为基础的生长速度没有增加，幼虫在羽化时的质量降低。我们看到了体重和体型差异的两个原因。首先，在羽化时大小是固定的，而许多昆虫的质量仍然可以增加。其次，遗传限制可能导致对大小和质量的不同反应。总的来说，我们的结果强烈建议在测试生活史反应时区分大小和质量。©2004伦敦林奈学会，林奈学会生物学杂志，2004,83,187-196。
Optimality models predict that, under a time constraint, organisms should accelerate development, and preferably so by increasing growth rate, to keep size at emergence constant. Unfortunately, most tests did neglect genetic constraints and interchanged mass with body size which may explain mixed support for some of the models’ predictions. We imposed time constraints on full sibling larvae of the damselfly Enallagma cyathigerum by manipulating day length regimes. Under a time constraint, larval development and growth rate based on size indeed were faster. This made it possible to keep size at emergence constant, despite the shorter development time. Interestingly, under a time constraint, growth rate based on mass was not increased and larvae had a lower mass at emergence. We see two reasons for this difference between body mass and size. First, size is fixed at emergence, while mass can still increase in many insects. Secondly, genetic constraints may have contributed to different responses for size and mass. In general, our results strongly suggest discriminating between size and mass when testing life history responses. © 2004 The Linnean Society of London, Biological Journal of the Linnean Society, 2004, 83, 187–196.