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在新热带鱼中自发失去骨盆翅膀的形态描述
Nicolás Roberto Ehemann1, Axel Meyer1, Christopher Darrin Hulsey2
1Department of Biology, University of Konstanz, Konstanz, Germany.
Journal of morphology
|December 15, 2023
概括
米达斯类动物自发失去了骨盆,这是以前没有类动物的特征. 这项研究调查了相关的形态变化,并发现了有限的类效应,主要影响侧面线尺度.
科学领域:
- 进化生物学 进化生物学
- 发展生物学 发展生物学
- 鱼类学 鱼类学 鱼类学
背景情况:
- 骨盆是一种保留的脊椎动物特征,但它们的丧失在四足动物和鱼类中独立发生了多次.
- 这种骨盆无状况通常与身体的延长和不对称性有关.
- 鱼,尽管它们的多样性,以前没有显示完全的骨盆的损失.
研究的目的:
- 为了研究米达斯水 (Amphilophus cf. 在米达斯水 (Amphilophus cf. 鱼 (Citrinellus) 是一个自发失去了骨盆的动物.
- 为了确定是否有其他形态差异伴随着该物种的骨盆腰带/翅膀损失.
- 探索涉及骨盆损失的基因的潜在类效应.
主要方法:
- 对正常和骨盆无米达斯类动物进行比较解剖分析.
- 检查肌肉骨结构,外部和内部解剖学.
- 评估美力学值,肌肉质量和双边不对称性,重点关注侧面线尺度.
主要成果:
- 在形态类型之间,胸肌肉质量,未配对的翅膀射线数量或口腔牙数量没有显著差异.
- 观察到同一侧身体上配对特征的美里斯蒂克值存在显著差异.
- 双边不对称性仅在后侧线尺度中发现,表明有限的类型.
结论:
- 在Midas cichlids中,自发的骨盆翅损失与特定的形态变化有关,特别是在横线尺度不对称方面.
- 这些发现表明,在类动物中,随着骨盆的损失而出现的轻微但有趣的类效应.
- 这项研究提供了关于远鱼骨盆的进化可塑性的见解.
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