复合的异常时态塑造了跨越适应区的视系统
Ronald M Bonett1, Emily L Bierbaum1, Alexander J Hess1
1Department of Biological Science, University of Tulsa, Tulsa, OK 74104, USA.
Proceedings. Biological sciences
|September 23, 2025
概括
发育时间 (异时) 和洞穴适应的变化解释了眼睛和视网膜的变化. 甲状腺激素 (TH) 信号传递
科学领域:
- 进化生物学是进化的生物学.
- 发育生物学是发展生物学.
- 比较解剖学的比较解剖学.
背景情况:
- 两动物的变形涉及水上到陆地的过渡,受发育时间 (异时) 的影响.
- 甲状腺激素 (TH) 信号调节了变形组织的转变和发育多样化.
- 异时性导致了多样化的生命周期模式,包括仅水生和仅陆生形式.
研究的目的:
- 为了研究生命周期模式和洞穴适应 (三角形) 如何解释的视觉系统的变化.
- 了解异时态在减少视觉系统投资方面的作用.
- 为了检查甲状腺激素反应对眼睛尺寸演变的影响.
主要方法:
- 对不同鱼生命周期模式和环境适应的视觉系统特征的比较分析.
- 检查发展轨迹和视觉系统投资下降的速度 (遵循哈勒规则).
- 评估甲状腺激素响应的paedomorphic和troglomorphic.
主要成果:
- 生命周期模式和因异时代驱动的形形态是沙兰眼睛和视网膜变化的主要因素.
- 异时性导致了失去了变形的的视觉系统的连续减少.
- 视觉系统的投资下降速度更快在paedomorphs,甚至更快在troglomorphs,与减少或逆转的甲状腺激素反应影响眼睛的大小.
结论:
- 激素介导转变的变化可以改变发育轨迹,导致在不同的环境中复合的表型变化.
- 不同时代和环境适应相互作用,塑造了像视觉系统这样复杂的特征的演变.
- 沙兰的视觉系统变异为理解发育可塑性和环境压力如何推动进化多样化提供了一个模型.
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