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首页> 外文期刊>ICES Journal of Marine Science >Lack of equivalence in the elemental and stable isotope chemistry within the sagittal otolith pair of the summer flounder,Paralichthys dentatus
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Lack of equivalence in the elemental and stable isotope chemistry within the sagittal otolith pair of the summer flounder,Paralichthys dentatus

机译：夏季比目鱼Paralichthys dentatus的矢状耳石对中元素和稳定同位素化学元素的缺乏

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摘要

In fish that are not bilaterally symmetrical, the left and right sagittae are often not symmetrical, exhibiting divergent growth patterns and mass, and may have differences in chemical composition. We investigated this in the asymmetrical summer flounder Paralichthys dentatus, collected from different nursery habitats along the US east coast. Significant differences were detected in otolith mass, δ~(13)C, δ~(18)O, Li:Ca, Mg:Ca, and Sr:Ca, and overall chemical signatures. These results refute the hypothesis of left- right equivalence that is prevalent for bilaterally symmetrical fishes. We tested whether a specific side was better suited for classification. The best models differed between sagittae and resulted in different classification accuracies. The left otolith produced better classification accuracies. Simulated samples of randomized sets of left or right otoliths produced mean accuracies intermediate to classification and were often highly variable. We recommend that future otolith chemistry studies involving bilaterally asymmetrical species test the hypothesis of equivalence within the sagittae before randomly choosing an otolith for chemical analyses.
机译：在不对称的鱼类中，左，右箭矢通常不对称，表现出不同的生长方式和质量，并且化学成分可能有所不同。我们在不对称夏季比目鱼Paralichthys dentatus中进行了调查，该比目鱼是从美国东海岸的不同苗圃栖息地收集的。在耳石质量，δ〜（13）C，δ〜（18）O，Li：Ca，Mg：Ca和Sr：Ca和整体化学特征方面检测到显着差异。这些结果驳斥了左右对称鱼普遍存在的左右等价的假设。我们测试了特定方面是否更适合分类。最佳的模型在人参之间有所不同，并导致不同的分类精度。左耳石产生更好的分类精度。左耳或右耳耳石随机集的模拟样本产生的平均准确度介于分类之间，并且通常变化很大。我们建议在涉及双侧不对称物种的未来耳石化学研究中，在随机选择耳石进行化学分析之前，先验证箭矢内等价的假设。

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