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在北美东部河流中,美国阴影的耳岩形状的表型变化

Joana Vasconcelos^1,2, Karin E Limburg^3,4, José Luis Oterro-Ferrer⁵

¹Grupo en Biodiversidad y Conservación (BIOCON), ECOAQUA, Universidad de Las Palmas de Gran Canaria, Canary Islands, 35017, Spain. joanapatricia.reis@ulpgc.es.

Scientific reports

|August 13, 2025

概括

耳石形状分析揭示了不同的美国 (Alosa sapidissima) 跨河的种群. 这种方法成功地区分了种群,显示了地理结构和环境对鱼类形态的影响.

科学领域:

鱼类学鱼类学鱼类学
鱼类生态鱼类生态学
生物地理学是生物地理学.

背景情况:

耳石形状分析是了解鱼群结构和环境影响的宝贵工具.
关于美国 (Alosa sapidissima) 耳皮形态及其种群差异化的研究是有限的.

研究的目的:

分析美国阴影石轮形状,以评估人口差异化和环境适应性.
为了评估石形状分析在美国阴影种群之间进行歧视的有效性.

主要方法:

从1141年收集的耳岩从美国的11条河流 (从加拿大到佛罗里达州) 穿过.
应用波波变换 (a trous算法,B3-spline波波) 用于形状量化.
利用主要组件分析,多层感知神经网络和分歧和形态型识别的集群分析.

主要成果:

观察到显著的耳骨形状变化,其中的关键差异在正面,反正面和后部区域.
波形分析确定了两种不同的形态 (上方和下方的立场) 沿着一个度梯度结构.
一个神经网络在分类个体时取得了90.9%的准确性,表明了强大的人口差异化,特别是在圣劳伦斯河和特拉华河.
集群分析揭示了五种具有明显空间分布的形态类型,这表明了当地环境的影响.

结论:

耳骨石形状分析是有效的解密美国阴影人口结构.
地理结构和当地环境条件似乎塑造了耳骨石形态,表明了美国影子中的类型塑性.

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