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Does sexual selection favour consistent behavioural differences in biparental cichlids?

性选择是否有利于双亲慈鲷一致的行为差异？

基本信息

批准号：
267126778
负责人：
Dr. Wiebke Schütt, Ph.D.
金额：
--
依托单位：
Department of Evolution, Behaviour and Environment
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/267126778?language=en
关键词：
Does sexual selection favour consistent

项目摘要

Behavioural flexibility should be an advantage in a world where environmental conditions change. Yet, there is increasing evidence for the existence of consistent behavioural differences among individuals of the same population across the animal kingdom. Functional explanations for the existence of such puzzling personality differences have recently been proposed, but as yet, little consideration has been given to test hypotheses empirically. Here, we aim to test one of these hypotheses: we propose to investigate the role of sexual selection in generating and maintaining the two aspects of animal personality, among-individual variation in the mean level of behaviour and variation in intra-individual behavioural consistency. We will test predictions for the existence of both types of variation based on a recent sexual selection framework (Schuett et al. 2010). We will focus specifically on novel applications of the framework; that compatibility in personality traits within pairs improves cooperation, coordination and predictability in offspring care and subsequent reproductive success and that therefore individuals choose their partner on the basis of personality traits (behavioural level and degree of consistency), and potentially also consider their own personality in the process. To tackle our questions we will conduct a combination of breeding and mate choice experiments using the biparental rainbow krib, Pelvicachromis pulcher, as model system. We will assess parental care coordination in pairs consisting of different personality combinations (both in terms of behavioural level and consistency), including underlying hormonal mechanisms, and subsequent reproductive success. Furthermore, we will examine whether reproductive consequences of personality combinations are reflected in female and male mate choice patterns: we will first correlatively and then experimentally test which aspect of personality (behavioural level or consistency; in aggression and risk-taking) plays a role during mate choice and whether individuals consider their own personality in their choice. By experimentally manipulating both the behavioural level and the degree of consistency of the chosen sex, we will be able to disentangle the relative importance of each personality component during mate choice for the first time. The proposed project will give novel insights into the existence of animal personality and the resolution of sexual conflict over parental investment. Given that within-species variation is the raw material for selection, studying the function and mechanistic underpinning of consistent behavioural variation within a species (personality variation) is furthermore important for understanding selection and the existence of behavioural diversity. Therefore, this study will have general implications for numerous fields in biology, ranging from behavioural and evolutionary ecology to conservation biology.

在一个环境条件不断变化的世界里，行为灵活性应该是一种优势。然而，越来越多的证据表明，在动物王国中，同一种群的个体之间存在一致的行为差异。最近有人提出了对这种令人困惑的人格差异的功能性解释，但迄今为止，很少有人考虑用经验来检验假设。在这里，我们的目标是测试这些假设之一：我们建议调查性选择的作用，在产生和维持动物个性的两个方面，在平均水平的行为和变化在个体内的行为一致性的个体差异。我们将根据最近的性选择框架（Schuett et al. 2010）来测试对这两种类型变异存在的预测。我们将特别关注该框架的新应用;配对中个性特征的兼容性提高了后代护理和随后生殖成功的合作，协调和可预测性，因此个人根据个性特征（行为水平和一致性程度）选择伴侣，并可能在此过程中考虑自己的个性。为了解决我们的问题，我们将进行育种和配偶选择实验的组合使用双亲彩虹krib，Pelvicachromis pulcher，作为模式系统。我们将评估由不同个性组合组成的成对父母护理协调（行为水平和一致性），包括潜在的激素机制和随后的生殖成功。此外，我们将研究是否生殖的个性组合的后果反映在女性和男性的择偶模式：我们将首先correlatively，然后实验测试的个性（行为水平或一致性，在侵略和冒险）的哪个方面发挥作用，在择偶和个人是否考虑自己的个性在他们的选择。通过实验性地操纵所选性别的行为水平和一致性程度，我们将能够第一次解开每个性格成分在择偶过程中的相对重要性。该项目将为动物个性的存在和父母投资的性冲突的解决提供新的见解。鉴于物种内变异是选择的原材料，研究物种内一致行为变异（个性变异）的功能和机制基础对于理解选择和行为多样性的存在也很重要。因此，这项研究将对生物学的许多领域产生普遍影响，从行为和进化生态学到保护生物学。