手的变异性和肢体不对称性减少了西方小警笛 (Siren nettingi)
Gibson M Barlow1, Nicholus M Ledbetter1
1Department of Natural Science, Northwestern Oklahoma State University, Alva, Oklahoma, USA.
Journal of morphology
|July 10, 2024
概括
遗留的特征会导致发育不稳定. 这项研究发现,西方的小警笛的变异性增加了.
科学领域:
- 进化生物学 进化生物学
- 发育生物学 发展生物学
- 比较解剖学的比较解剖学
背景情况:
- 特征功能影响形态发展,遗留的特征可能显示出发育不稳定性.
- 波动不对称 (FA) 和人口变异是遗留特征发育不稳定的指标.
研究的目的:
- 为了比较波动的不对称性 (FA) 和四肢对称性在西方小海 (Siren nettingi) 和Ouachita阴暗 (Desmognathus brimleyorum).
- 为了研究Siren nettingi中的中脚足变异和手足表型.
主要方法:
- 用清除和染色技术进行解剖视觉化.
- 采用形态测量分析来量化四肢不对称性和全量测量.
- 比较的四肢发育和变化之间的Siren nettingi和Desmognathus brimleyorum.
主要成果:
- 在Siren nettingi中确定了新的手掌表型和手掌不对称性.
- 在Siren nettingi中没有发现肢体长度不对称的显著证据.
- 在研究的两种物种中观察到相对四肢不对称性和身体大小之间的反向相关性.
结论:
- 提供了强有力的证据,证明了Siren nettingi种群中中足动物变异的增加.
- 突出了残留特征可能表现出发育不稳定性和变异的潜力.
- 建立了未来研究萨拉曼德物种多样化的形态特征的基础.
相关概念视频
01:27Assessment of the Cardiovascular System III: Palpation
296
Palpation involves feeling the body to evaluate texture, size, consistency, and tenderness for assessing cardiovascular health. The following steps are organized in a head-to-toe order:
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...
296
01:21Testing 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