Consequences of maternal effects and late developmental stress on sexually selected traits and behavior in zebra finches

母体效应和后期发育应激对斑胸草雀性选择特征和行为的影响

• 批准号: 5442369
• 负责人: Professor Dr. Marc Naguib
• 金额: --
• 依托单位: Behavioural Ecology Group
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5442369?language=en
• 关键词: Consequences; maternal; effects; late; developmental

The conditions indivuals experience during early development have marked effects on their developmental trajectory and life history strategies. Songbirds have been a key model in studies on short term effects of developmental stress. The closed environment of the egg and the fast developmental process within the egg and after hatching provides unique opportunities to experimental approaches. The research proposed here will test effects of condition during two different key developmental periods, i.e. within the egg, and during "puberty" on the expression of sexually selected traits and behavior in adulthood. In two separate breeding experiments with zebra finches (Taeniopygia guttata), it is planned (1) to manipulate the nutritional conditions during "puberty", i.e. the period in which song is acquired and other sexually selected traits develop and (2) in a second experiment to manipulate the levels of yolk testosterone in the egg, a factor that is wll know to have short term effects on development. These experiments will provide insights into long term effects of developmental conditions during these key periods of development, an issue that as yet has not been well studied in birds. The results will contributed to the broader understanding of the evolution of sexually selected traits and the proximate factors that lead to their expression.

个体在早期发育过程中所经历的条件对其发育轨迹和生活史策略有显著影响。鸣禽一直是研究发育应激短期效应的关键模型。卵的封闭环境和卵内及孵化后的快速发育过程为实验方法提供了独特的机会。这里提出的研究将测试两个不同的关键发育时期，即卵内和“青春期”对成年期性选择特征和行为表达的影响。在两个独立的斑马雀（Taeniopygia guttata）繁殖实验中，计划(1)控制“青春期”（即获得鸣叫和其他性选择特征发育的时期）的营养状况，(2)在第二个实验中控制鸡蛋中卵黄睾酮的水平，这是一个众所周知对发育有短期影响的因素。这些实验将提供在这些关键时期发育条件的长期影响的见解，这一问题尚未在鸟类中得到很好的研究。这些结果将有助于更广泛地理解性选择特征的进化以及导致其表达的近似因素。