降温与热身热带爬行动物一样重要,对于一个大体的热带爬行动物来说,降温和热身一样重要
Kaitlin E Barham1, Ross G Dwyer2, Celine H Frere1
1School of the Environment, University of Queensland, Saint Lucia, Queensland 4072, Australia.
Proceedings. Biological sciences
|November 5, 2024
概括
河口鱼通过升温和降温来积极调节体温 (Tb),偏离水温 (Tw). 这种受大小和季节影响的温度调节行为突显了爬行动物对气候变暖的抵抗力.
科学领域:
- 类学 类学 类学 类学
- 生理生态生态学 生理生态学
- 行为生态学 行为生态学
背景情况:
- 湿热体生理是温度依赖的,需要行为温度调节才能达到最佳功能.
- 热带外热植物通常生活在它们的热耐受性范围内,这表明它们符合环境温度.
- 河口鱼 (Crocodylus porosus) 是一个生活在热带环境中的大型外热动物.
研究的目的:
- 为了研究河口鱼的体温与水温的关系.
- 为了确定河口鱼的行为温度调节模式.
- 评估性别,体型,时间和年龄对鱼体温的影响.
主要方法:
- 在163只河口鱼中追踪体温 (Tb) 超过13年.
- 鱼Tb与水温 (Tw) 的比较,使用鱼类传感器对39个人 (2015-2018) 进行比较.
- 分析Tb相对于Tw的个体间和个体内变化,考虑环境和生物因素.
主要成果:
- 鱼Tb通常符合Tw,但观察到显著的个体间和个体内差异.
- 偏离Tw,特别是在更温暖的时期,表明活跃的温度调节行为 (升温和降温事件).
- 较大的鱼表现出更频繁的温度调节行为,冬季变暖,夏季降温.
结论:
- 河口鱼每年都会表现出积极的升温和降温行为来调节体温.
- 这些温度调节策略表明该物种对环境温度波动,包括气候变暖的弹性.
- 这项研究提供了第一个证据,证明大型爬行动物的不同热类型.
相关概念视频
Thermoregulation
906
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
906
Body Temperature
913
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
913
Requirements for Human Life
7.8K
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
7.8K
Decreased Body Temperature
602
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
602
Responses to Heat and Cold Stress
13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K
Testing a Claim about Mean: Unknown Population SD
3.4K
A complete procedure of testing a hypothesis about a population mean when the population standard deviation is unknown is explained here.
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used;...
3.4K


