代谢稳定性的遗传性差异是三脊 (Gasterostues aculeatus) 生态型的热耐受性的基础
Emily V Kerns1, Kristofer T Sasser1, Jesse N Weber1
1University of Wisconsin-Madison, Department of Integrative Biology.
bioRxiv : the preprint server for biology
|September 26, 2025
概括
由于稳定的有氧范围 (AS),本土鱼表现出更大的热弹性,这表明它能够适应更温暖的气候. 然而,随着温度的变化,AS并没有影响鱼的状况或免疫力,正如OCLTTH预测的那样.
科学领域:
- *生态学和进化生物学
- *生理生态生态学
- * 气候变化生物学
背景情况:
- *全球气温上升需要了解热耐受性的种内特异性变化,以便预测有机体和种群层面的影响.
- *氧气和容量有限的热耐受性假设 (OCLTTH) 将有氧范围 (AS) 与性能指标联系起来,表明其在热耐受性中的作用.
- *三脊鱼 (Gasterosteus aculeatus) 呈现出明显的盆地和地生态型,在热适应方面可能有所不同.
研究的目的:
- * 评估底和底杆鱼生态型的短期和长期热耐受性.
- *研究在不同温度下有氧范围 (AS) 和寄生虫免疫力的遗传变异.
- * 测试OCLTTH关于AS,鱼的状况和在高温下免疫力的预测.
主要方法:
- * 常见花园实验测量了三脊的有氧范围 (AS) 和寄生虫免疫力.
- *将鱼类暴露在低于其最大热值的受控温度下,以评估生存和生理反应.
- *分析AS,温度,鱼类状况和寄生虫耐药性之间的关系.
主要成果:
- * 随着温度的增加,生存率下降,在最高温度下,在粘性鱼中影响更为明显.
- * 盆地鱼表现出进化的热弹性,与跨温度稳定的AS相关.
- *与OCLTTH的预测相反,温度诱导的AS变化与鱼的状况或免疫力下降无关.
结论:
- * 盆地鱼种群表现出热弹性,这表明它们有适应气候变暖的能力.
- * OCLTTH关于AS,病情和免疫力的预测在本研究中没有得到充分的支持.
- *需要进一步的研究,才能充分理解影响鱼类耐热性和适应气候变化的因素的复杂相互作用.
相关概念视频
01:26Derivatives: Problem Solving
3
Temperature-Dependent Growth of Brook TroutThe growth of brook trout is closely influenced by water temperature. Experimental data demonstrate how trout weight changes over a 24-day period in response to varying water temperatures. At lower temperatures, such as 15.5 degrees Celsius, brook trout show significant weight gain. However, as the temperature increases, the amount of weight gained steadily decreases. At the highest temperature measured, 24.4 degrees Celsius, trout experience a net...
3
02:27Background and Environment Affect Phenotype
7.4K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
7.4K
01:06Fixed Action Patterns
17.5K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
17.5K
01:29Diversity of Archaea IV
412
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
412
01:32What is Natural Selection?
125.8K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
125.8K
01:27Factors Influencing Microbial Growth: Temperature
1.1K
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
1.1K