Life history consequences of growth variation

现在人们普遍认识到，虽然动物可能会从发育早期经历的食物质量或数量不佳的时期恢复过来，但不利的影响可能会发生在成年后的生活中。这种影响可能会影响整个动物群体的表现，并对种群动态产生重要影响。为什么这种延迟效应会在动物的一生中发生，人们对此知之甚少。在经历了一段时间的短缺之后，动物通常会迅速生长，可能会出现追赶的现象。早期营养不良的时期本身，或与随后加速生长相关的问题，可能是潜在的原因。这些都没有被分开。然而，重要的是，我们要了解补偿性增长是否会带来长期成本，因为这对我们理解增长率的演变(最优化还是最大化？)有着广泛的影响。和人生史策略。我们将以斑纹草雀为研究物种，研究早期生长轨迹变异的长期后果。我们将从DNA水平、细胞水平、整体代谢水平和整个有机体的衰老水平来考察影响。

It is now widely appreciated that, while animals may appear to recover from periods of poor food quality or quantity experienced in early development, adverse effects may occur later in adult life. Such effects can influence the performance of complete cohorts of animals, and have important consequences for population dynamics. The reasons why such delayed effects occur across the animals' lifetimes are poorly understood. Following a period of shortage, animals often grow rapidly and may appear to catch-up. The period of early poor early nutritional itself, or problems associated with subsequent accelerated growth, could potentially be responsible. These have not been separated. However, it is important that we understand whether compensatory growth does carry long-term costs, since this has widespread ramifications for our understanding of the evolution of growth rate (optimised or maximised?) and life history strategies. We will study the long-term consequences of variation in early growth trajectories, using the zebra finch as a study species. We will examine effects at the levels of DNA, cells, overall metabolism and senescence of the whole organism.