Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
基本信息
- 批准号:RGPIN-2017-06285
- 负责人:
- 金额:$ 2.4万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2019
- 资助国家:加拿大
- 起止时间:2019-01-01 至 2020-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Until recently, sexual selection theory assumed most taxa were monogamous and selection was thought to operate mainly via processes prior to copulation (i.e. pre-copulatory selection), namely mate choice (typically females choosing amongst males) and competition for mates (typically males vs. males for access to females). However, genetic and behavioural studies have recently shown that sexual promiscuity is common among most taxa. Multiple mating by females creates the potential for sexual selection to continue after copulation through (i) the competition between sperm of different males for the fertilization of a set of ova (sperm competition) and (ii) the differential use of sperm from one male over another, with a presumed genetic benefit to offspring fitness (cryptic female choice). As a result, reproductive fitness is now understood to be determined by the complex interactions of traits (at both the phenotypic and genotypic level) selected in males and females during episodes of selection before and after copulation. Thus, a central question emerging in sexual selection theory is how do males and females interact in terms of sexual conflict (i.e. due to different reproductive interests) in this post-copulatory selection arena. My long-term objective is to quantify the relative importance of post-copulatory selection on reproductive fitness (from a male and female perspective) in order to gain a better understanding of the evolutionary consequences of sexual selection by building on my previous work and move into innovative new areas of research focusing on Chinook salmon (Oncorhynchus tshawytscha) and redside dace (Clinostomus elongatus) mating systems to examine: (1) whether post-spawning selection reinforces or counteracts pre-spawning selection using experimental crosses (in a wild setting), (2) post-spawning mechanisms that include all ejaculate components for males (sperm, seminal plasma) and females (ovarian fluid and eggs), (3) broad-scale evolutionary patterns of post-spawning sexual selection across populations and species. The research will involve several approaches to test hypotheses including (among others) field research, in-vitro fertilization trials, genomics and microscopy techniques to assess sperm quality. Overall, this research program promises to (i) produce high quality peer-reviewed publications, (ii) create innovative research tools for those who study intrasexual and intersexual selection and (iii) train highly qualified personnel for academia, the private sector or government.
直到最近,性选择理论还假设大多数分类群是一夫一妻制的,选择被认为主要通过交配前的过程(即交配前选择)进行,即配偶选择(通常是雌性在雄性中选择)和对配偶的竞争(通常是雄性对雄性以获得雌性)。然而,遗传和行为研究最近表明,性乱行为在大多数类群中很常见。雌性的多次交配创造了交配后继续进行性选择的可能性,通过(I)不同雄性的精子之间竞争一套卵子的受精(精子竞争)和(Ii)不同雄性的精子对另一种雄性的不同使用,推定对后代健康有遗传上的好处(隐蔽的雌性选择)。因此,生殖适合性现在被认为是由在交配前后的选择过程中雄性和雌性所选择的性状(在表型和基因水平上)的复杂相互作用决定的。因此,性选择理论中出现的一个中心问题是,在交配后的选择领域中,男性和女性如何在性别冲突(即由于不同的生殖兴趣)方面进行互动。我的长期目标是量化交配后选择对生殖适合度的相对重要性(从雄性和雌性的角度),以便通过我以前的工作更好地理解性选择的进化后果,并进入创新的新研究领域,专注于Chinook鲑鱼(Oncorhynchus Tshawytscha)和红斑鱼(Clinostomus Glagatus)的交配系统,以检查:(1)产卵后选择是加强还是抵消产卵前选择(在野外环境中),(2)产卵后机制,包括雄性(精子、精浆)和雌性(卵巢液和卵子)的所有射精成分,(3)不同种群和物种产卵后性别选择的大范围进化模式。这项研究将涉及几种检验假说的方法,其中包括实地研究、体外受精试验、基因组学和评估精子质量的显微技术。总体而言,这项研究计划承诺(I)制作高质量的同行评议出版物,(Ii)为研究两性选择和两性选择的人创造创新的研究工具,以及(Iii)为学术界、私营部门或政府培训高素质的人员。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Pitcher, Trevor其他文献
Pitcher, Trevor的其他文献
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{{ truncateString('Pitcher, Trevor', 18)}}的其他基金
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2022
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2021
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2020
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Developing high-performance Chinook salmon stocks for use in aquaculture: microbiome, alternative reproductive tactics and cryopreservation
开发用于水产养殖的高性能奇努克鲑鱼种群:微生物组、替代繁殖策略和冷冻保存
- 批准号:
488302-2015 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Collaborative Research and Development Grants
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Developing high-performance Chinook salmon stocks for use in aquaculture: microbiome, alternative reproductive tactics and cryopreservation
开发用于水产养殖的高性能奇努克鲑鱼种群:微生物组、替代繁殖策略和冷冻保存
- 批准号:
488302-2015 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Collaborative Research and Development Grants
Developing high-performance Chinook salmon stocks for use in aquaculture: microbiome, alternative reproductive tactics and cryopreservation
开发用于水产养殖的高性能奇努克鲑鱼种群:微生物组、替代繁殖策略和冷冻保存
- 批准号:
488302-2015 - 财政年份:2016
- 资助金额:
$ 2.4万 - 项目类别:
Collaborative Research and Development Grants
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2016
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2015
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
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相似海外基金
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2022
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2021
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2020
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Post-spawning sexual selection and reproductive fitness in fishes
鱼类产卵后性选择和生殖健康
- 批准号:
RGPIN-2017-06285 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2016
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2015
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2014
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2013
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Pre- and post-spawning sexual selection in fishes: proximate and ultimate explanations of variation in reproductive fitness
鱼类产卵前和产卵后的性选择:生殖适应性变化的直接和最终解释
- 批准号:
341955-2012 - 财政年份:2012
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual