Killing them softly: Ontogeny of jaw mechanics and stiffness in mollusk‐feeding freshwater stingrays
Killing them softly: Ontogeny of jaw mechanics and stiffness in mollusk‐feeding freshwater stingrays
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轻柔地杀死它们：软体动物下颌力学和刚度的个体发育——喂养淡水黄貂鱼
DOI：
10.1002/jmor.20984
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发表时间：
2019
影响因子：
1.5
通讯作者：
Kolmann, Matthew A.
中科院分区：
文献类型：
--
作者：
Rutledge, Kelsi M.;Summers, Adam P.;Kolmann, Matthew A.
食硬壳的捕食者吃硬壳的猎物，如双壳类、腹足类和大型甲壳类动物，通常是通过碾碎矿化的外骨骼。从咬合力、操作时间和对捕食者骨骼施加的压力的角度来看，这是代价高昂的。硬食性分类群表现出个体发育从较软的猎物向较硬的猎物转变的情况并不少见，这意味着较小的动物相对较难捕食有壳的猎物。蝙蝠类鱼类(射线、溜冰鱼、锯鱼和吉他鱼)已经多次独立进化出食硬性，尽管与粉碎猎物比它们自己的软骨骨骼更难相关的挑战。我们用面积二阶矩作为抗弯能力的指标，并分析了颌骨OFP矿化骨架的排列。使用来自计算机断层扫描(CT)扫描的数据进行利奥多夫个体发育研究。大白鲨OFP。Lleopoldidios几乎不像其他食硬性的弹性支链那样抵抗弯曲，而且颌骨最坚硬的地方是关节附近，而不是牙列以下。虽然第二时刻在个体发育过程中具有相似的物质分布，但牙齿下颌骨的矿化随着年龄的增长而增加。新生放射物颌骨僵硬程度低，矿化能力差，提示P。狮子兽在生命早期可能不会以硬壳猎物为食。颌骨在形状、硬度和矿化方面的这些差异。与其食性较大的近亲进行比较表明，有几种方法可以解决用顺从的骨骼粉碎有壳猎物的问题。
Durophagous predators consume hard‐shelled prey such as bivalves, gastropods, and large crustaceans, typically by crushing the mineralized exoskeleton. This is costly from the point of view of the bite forces involved, handling times, and the stresses inflicted on the predator's skeleton. It is not uncommon for durophagous taxa to display an ontogenetic shift from softer to harder prey items, implying that it is relatively difficult for smaller animals to consume shelled prey. Batoid fishes (rays, skates, sawfishes, and guitarfishes) have independently evolved durophagy multiple times, despite the challenges associated with crushing prey harder than their own cartilaginous skeleton.Potamotrygon leopoldiis a durophagous freshwater ray endemic to the Xingu River in Brazil, with a jaw morphology superficially similar to its distant durophagous marine relatives, eagle rays (e.g.,Aetomylaeus, Aetobatus). We used second moment of area as a proxy for the ability to resist bending and analyzed the arrangement of the mineralized skeleton of the jaw ofP. leopoldiover ontogeny using data from computed tomography (CT) scans. The jaws ofP. leopoldido not resist bending nearly as well as other durophagous elasmobranchs, and the jaws are stiffest nearest the joints rather than beneath the dentition. While second moment has similar material distribution over ontogeny, mineralization of the jaws under the teeth increases with age. Neonate rays have low jaw stiffness and poor mineralization, suggesting thatP. leopoldimay not feed on hard‐shelled prey early in life. These differences in the shape, stiffness and mineralization of the jaws ofP. leopoldicompared to its durophagous relatives show there are several solutions to the problem of crushing shelled prey with a compliant skeleton.
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软骨鱼类（鲨鱼和鳐鱼）棋盘状内骨骼的超微结构和发育特征
影响因子：
2.4
作者：
Ronald Seidel;Kady Lyons;M. Blumer;P. Zaslansky;P. Fratzl;J. Weaver;M. Dean
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发表时间：
2012
期刊：
影响因子：
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G. Moro;Patricia Charvet;Ricardo S. Rosa
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影响因子：
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作者：
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影响因子：
2.5
作者：
Fedorov, Andriy;Beichel, Reinhard;Kalpathy-Cramer, Jayashree;Finet, Julien;Fillion-Robin, Jean-Christophe;Pujol, Sonia;Bauer, Christian;Jennings, Dominique;Fennessy, Fiona;Sonka, Milan;Buatti, John;Aylward, Stephen;Miller, James V.;Pieper, Steve;Kikinis, Ron
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Kikinis, Ron
巴西亚马逊内格罗河中游淡水黄貂鱼（Elasmobranchii，Potamotrygonidae）胃内容物分析
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
Akemi Shibuya;M. L. G. Araújo;J. Zuanon
通讯作者：
J. Zuanon