Ecological and physiological convergence in thermoregualtion by Caprimulgid birds and Vespertilionid bats
Caprimulgid鸟类和Vespertilionid蝙蝠温度调节的生态和生理趋同
基本信息
- 批准号:RGPIN-2017-06677
- 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:2020
- 资助国家:加拿大
- 起止时间:2020-01-01 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Energy is the currency by which the costs and benefits of many biological functions are measured and likely best explains behaviour by animals in general and endotherms in particular. My research program is focused on determining the ecological context for how, when and why endotherms use “heterothermy” to save energy. Daily torpor stems from reduced metabolism and thus reduced body temperature (Tb) leading to energetic savings. Its importance is underscored by the rapidly increasing number of species recorded to use it and the idea that it makes endotherms less susceptible to extinction.
We study the use of daily torpor by both insectivorous bats and nocturnal birds (nightjars) whose responses converge ecologically and physiologically. In the short-term we will identify broad patterns in torpor use with a long-term goal of addressing why individuals employ it when they do, the cues used to initiate the response, and finally the reasons for the apparent flexibility of its use. Behavioural and ecological factors that likely influence torpor use include: body condition, social interactions, foraging success and roost structure. The relative importance of these factors is poorly understood and our research will assess the nature of interactions between them.
We will measure torpor use by bats and birds in natural situations as part of a long-term study of big brown bats and following from recent work on silver-haired bats, both projects taking place in Cypress Hills, Saskatchewan and short-term studies of a variety of species including Common Poorwills, Whip-poor-wills in South Dakota, Common Pauraques in Panama, and Freckled and Rufous-cheeked Nightjars in southern Africa. For most projects, temperature sensitive radio-transmitters or data loggers will be used to collect data on body temperature as a proxy for metabolism to infer how free living animals use torpor. Where feasible we will use heart-rate telemetry to more directly assess the metabolism of free ranging animals. Where possible, we will experimentally manipulate food availability and or the energetic costs incurred by study animals to assess which factors are most important for stimulating torpor use.
The most important outcome of my research program will be to refine a Heterothermy Framework relating the ecological determinants of torpor use by diverse animals. Overall our results will allow us to assess both the direct and interactive effects of variables such as resource availability, ambient temperature, roost structure, and social dominance on the degree of energy savings which accrue from heterothermy hopefully to be able to predict both species and circumstances when torpor will be employed by currently unstudied species. This will enhance our understanding of energy as an evolutionary currency.
能量是衡量许多生物功能的成本和效益的货币,可能最能解释一般动物和恒温动物的行为。我的研究项目集中在确定生态环境如何,何时以及为什么恒温动物使用“异温”来节省能源。日常的麻木源于新陈代谢的减少,从而降低了体温(Tb),导致能量的节省。它的重要性是强调了迅速增加的物种记录使用它,并认为它使恒温动物不易灭绝的想法。
我们研究了食虫蝙蝠和夜行性鸟类(夜鹰)的反应收敛生态和生理的日常麻木的使用。在短期内,我们将确定迟钝使用的广泛模式,长期目标是解决为什么个体在使用时使用它,用于启动反应的线索,以及最后使用它的明显灵活性的原因。行为和生态因素,可能影响迟钝的使用包括:身体状况,社会互动,觅食成功和栖息地结构。这些因素的相对重要性知之甚少,我们的研究将评估它们之间相互作用的性质。
我们将测量蝙蝠和鸟类在自然情况下的麻痹使用作为大棕色蝙蝠的长期研究的一部分,并遵循最近的银发蝙蝠工作,这两个项目发生在柏树山,萨斯喀彻温省和短期研究的各种物种,包括常见的Poorwills,鞭子穷人的意愿在南达科他州,常见的Pauraques在巴拿马,和雀斑和棕颊夜鹰在南部非洲。对于大多数项目,将使用温度敏感的无线电发射器或数据记录器来收集体温数据,作为新陈代谢的代表,以推断自由生活的动物如何使用休眠。 在可行的情况下,我们将使用心率遥测更直接地评估自由放养动物的代谢。在可能的情况下,我们将实验性地操纵食物供应和/或研究动物产生的能量成本,以评估哪些因素对刺激麻痹使用最重要。
我的研究计划的最重要的成果将是完善一个异温动物的框架有关的生态决定因素,由不同的动物休眠使用。总的来说,我们的研究结果将使我们能够评估的直接和交互作用的变量,如资源的可用性,环境温度,栖息地结构,和社会优势的程度上的能源节约,积累从异温,希望能够预测物种和情况时,休眠将采用目前未研究的物种。 这将增强我们对能源作为一种进化货币的理解。
项目成果
期刊论文数量(0)
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Brigham, Mark其他文献
Brigham, Mark的其他文献
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{{ truncateString('Brigham, Mark', 18)}}的其他基金
Ecological and physiological convergence in thermoregualtion by Caprimulgid birds and Vespertilionid bats
Caprimulgid鸟类和Vespertilionid蝙蝠温度调节的生态和生理趋同
- 批准号:
RGPIN-2017-06677 - 财政年份:2022
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological and physiological convergence in thermoregualtion by Caprimulgid birds and Vespertilionid bats
Caprimulgid鸟类和Vespertilionid蝙蝠温度调节的生态和生理趋同
- 批准号:
RGPIN-2017-06677 - 财政年份:2021
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological and physiological convergence in thermoregualtion by Caprimulgid birds and Vespertilionid bats
Caprimulgid鸟类和Vespertilionid蝙蝠温度调节的生态和生理趋同
- 批准号:
RGPIN-2017-06677 - 财政年份:2019
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological and physiological convergence in thermoregualtion by Caprimulgid birds and Vespertilionid bats
Caprimulgid鸟类和Vespertilionid蝙蝠温度调节的生态和生理趋同
- 批准号:
RGPIN-2017-06677 - 财政年份:2018
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological and physiological convergence in thermoregualtion by Caprimulgid birds and Vespertilionid bats
Caprimulgid鸟类和Vespertilionid蝙蝠温度调节的生态和生理趋同
- 批准号:
RGPIN-2017-06677 - 财政年份:2017
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological influences on the use of torpor by Caprimulgid birds and Vespertilionid bats
生态学对 Caprimulgid 鸟类和 Vespertilionid 蝙蝠利用麻木状态的影响
- 批准号:
105563-2012 - 财政年份:2015
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological influences on the use of torpor by Caprimulgid birds and Vespertilionid bats
生态学对 Caprimulgid 鸟类和 Vespertilionid 蝙蝠利用麻木状态的影响
- 批准号:
105563-2012 - 财政年份:2014
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological influences on the use of torpor by Caprimulgid birds and Vespertilionid bats
生态学对 Caprimulgid 鸟类和 Vespertilionid 蝙蝠利用麻木状态的影响
- 批准号:
105563-2012 - 财政年份:2013
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Ecological influences on the use of torpor by Caprimulgid birds and Vespertilionid bats
生态学对 Caprimulgid 鸟类和 Vespertilionid 蝙蝠利用麻木状态的影响
- 批准号:
105563-2012 - 财政年份:2012
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
The influence of ecological context on the use of torpor by caprimulgid birds and vespertilionid bats
生态环境对卡普里莫德鸟类和vespertilionid蝙蝠利用麻木状态的影响
- 批准号:
105563-2007 - 财政年份:2011
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
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