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首页> 外文期刊>Animal biology >Righting time versus shell size and shape dimorphism in adult Hermann's tortoises: Field observations meet theoretical predictions
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Righting time versus shell size and shape dimorphism in adult Hermann's tortoises: Field observations meet theoretical predictions

机译：成年赫尔曼乌龟的正直时间与壳大小和形状二态性的关系：实地观察符合理论预测

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摘要

We investigated the relation between righting time (RT) and carapace morphology in 303 adult Hermann's tortoises (Testudo hermanni Gmelin, 1789) from two geographically close localities. Their size, shape and body mass, adjusted for size, were significantly different between males and females. Righting time differed among the populations and was related to the ambient temperature and the relative body mass and carapace shape. However, analysis showed that the impact of carapace "form" (shape plus relative body mass) alone had only moderate influence on the variation in righting time ("function"). Both "form" and "function" did not contribute much to the segregation of individuals in geometric space, based on either sex or locality. An interesting detail was that tortoises with a height/width ratio of the shell contour higher than 0.75 had quite a short righting time (less than 100 seconds), which is in accordance with the proposed theoretical model of energy balance of righting in chelonians. We suppose that interactions between general carapace "form", specific components of shell structure, physiological parameters and local environments shape variation in righting response in this species. An interdisciplinary approach combining geometric modeling with traditional biological disciplines would be needed to support this hypothesis.?
机译：我们研究了来自两个地理位置较近的地区的303只成年赫尔曼龟（Testudo hermanni Gmelin，1789）中的正直时间（RT）与甲壳形态之间的关系。调整大小后，它们的大小，形状和体重在男性和女性之间存在显着差异。不同人群的扶正时间不同，与环境温度，相对体重和甲壳形状有关。但是，分析表明，单独的甲壳“形式”（形状加上相对体重）的影响仅对扶正时间（“功能”）的变化有中等影响。 “形式”和“功能”对基于性别或地点的几何空间中的个人隔离都没有太大贡献。一个有趣的细节是，龟壳轮廓的高/宽比大于0.75的乌龟具有相当短的扶正时间（少于100秒），这与拟议中的靠山的扶正能量平衡理论模型一致。我们认为，一般的甲壳“形式”，壳结构的特定成分，生理参数和局部环境之间的相互作用会影响该物种在扶正反应中的变化。需要采用跨学科方法将几何建模与传统生物学学科结合起来，以支持这一假设。

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