Abstract

In this study, otolith shape analysis has been used to perform identification of two smelt species specimens (genus Hypomesus), H. japonicus and H. nipponensis, as well as differentiation of local gatherings in the first species, in the north-western Sea of Japan (SJ). Based on the otolith shape and using several multidimension statistical approaches obvious differences were defined for both inter- and intraspecies levels of otolith variation. Species discrimination by otolith shape indices and other variables extends well to within the species H. japonicus gatherings, the individuals sampled from the northern sample in Olga Bay (OB) are most similar morphologically to those from the coastal waters off the village of Terney to the north of OB. In contrast, the individuals of this species from the coastal waters off Russky Island (RI), including another southern sample and those from northern samples, manifest the greatest differences, thus providing evidence on the existence of at least two local stocks of the species in the waters of the north-western Sea of Japan.

中文翻译：

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耳石形态分析及其用于鉴定日本西北海的两种低气味种Hypomesus japonicus和H. nipponensis（Osteichthyes，Osmeridae）的方法，有助于推断H. japonicus的种群

摘要

在这项研究中，耳石形状分析已被用于鉴定日本H. japonicus和H. nipponensis这两个冶炼物种标本（Hypomesus 属），以及区分西北海中第一个物种的局部聚集。日本（SJ）。基于耳石的形状并使用多种多维统计方法，对种间和种内耳石变异的水平定义了明显的差异。通过耳石形状指数和其他变量对物种的区分很好地延伸到了日本血吸虫物种内从奥尔加湾（OB）北部样本中采集的个体在形态上与从OB北部特尼村附近的沿海水域采集的个体在形态上最相似。相比之下，来自拉斯基岛（RI）沿海水域的该物种的个体，包括另一个南部样本和来自北部样本的个体，表现出最大的差异，从而提供了至少两个当地物种种群存在的证据。日本西北海的水域。