Geographic, intraspecific and sexual variation in beak morphology of purpleback flying squid (Sthenoteuthis oualaniensis) throughout its distribution range

文献类型： 外文期刊

第一作者： Liu, Bi Lin

作者： Liu, Bi Lin;Chen, Xin Jun;Fang, Zhou;Xu, Luo Liang;Wang, Xue Hui;Du, Fei Yan;Liu, Bi Lin;Chen, Xin Jun;Liu, Bi Lin;Liu, Bi Lin;Liu, Bi Lin;Chen, Xin Jun

作者机构：

关键词： multivariate statistics; population

期刊名称：MARINE AND FRESHWATER RESEARCH （ 影响因子：2.07； 五年影响因子：2.162 ）

ISSN： 1323-1650

年卷期： 2019 年 70 卷 3 期

页码：

收录情况： SCI

摘要： In this study we investigated 745 specimens of purpleback flying squid Sthenoteuthis oualaniensis across a large distribution range to investigate geographic, intraspecific and sexual variations in beak morphology. Beak morphometric variables showed significant spatial and intraspecific differences (P < 0.05), with samples from the north-western Indian Pacific Ocean and the South China Sea having the largest and smallest beaks respectively. Multivariate statistical analysis indicated that the morphological characteristics of squid beaks would be useful for the identification of population structures and sex determination. Environmental conditions may be the major reason for variations in beak morphology between geographic populations throughout large distribution areas. In contrast, genetic differences may contribute to most of the intraspecific variation in beak morphology in the South China Sea. To address this clearly, further research needs to be done on morphology combined with genetic evaluation to compare methods of geographic and intraspecific population identification.

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