Thermodynamics of egg production, development and hatching in trematodes.
Thermodynamics of egg production, development and hatching in trematodes.
复制标题
吸虫产卵、发育和孵化的热力学。
作者：
N. Morley;J. Lewis
温度是影响变温动物生物过程速率的关键因素，与气候变化有着内在联系。吸虫寄生虫可能对温度变化有潜在的敏感性，为了建立它们对气候变化反应的预测框架，需要进行大规模的分析。特别是，所有物种的卵的生物学在某些时候都受到环境条件的影响。本研究利用Arrhenius活化能（E*）来分析温度对吸虫卵的产生、发育和孵化影响的科学文献中的实验数据。Arrhenius活化能是温度介导反应速率的常用测量方法。鸡蛋产量在高温下下降，栖息地特定的气候因素决定了最佳温度范围。卵的发育，作为典型的无脊椎动物，表现出对温度的简单反应，在中纬度（35-60°）和低纬度（<35°）物种之间的差异很小。鸡蛋孵化表现出可变的热力学，在低温范围内具有高E*值，在中温范围内具有热稳定性，在高温范围内下降，具有广泛的热稳定区是一个共同的特征。发育和孵化的比较表明，这两个参数表现出不同的热力学响应。讨论了这些结果对进一步了解自然条件下吸虫卵生物学的意义。
Temperature is a key factor influencing the rate of biological processes of ectothermic animals and is intrinsically linked to climate change. Trematode parasites may be potentially susceptible to temperature changes and, in order to develop a predictive framework of their response to climate change, large-scale analyses are needed. In particular, the biology of the egg of all species is at some time influenced by environmental conditions. The present study uses Arrhenius activation energy (E*), a common measure of temperature-mediated reaction rates, to analyse experimental data from the scientific literature on the effects of temperature on the production, development and hatching of trematode eggs. Egg production declines at high temperatures, with habitat-specific climatic factors determining the optimal thermal range. Egg development, as is typical of invertebrates, shows a simple response to temperature, with minimal differences between mid- (35-60°) and low-latitude (<35°) species. Egg hatching demonstrates variable thermodynamics with high E* values at low temperature ranges and thermostability at mid-temperatures, before declining at high temperature ranges, with wide thermostable zones being a common feature. Comparisons between development and hatching indicate that these two parameters demonstrate different thermodynamical responses. The significance of these results in furthering our understanding of trematode egg biology under natural conditions is discussed.