东海外海金乌贼角质颚与内壳微结构特征及轮纹判读Microstructure of Beak and Cuttlebone and Determination of Growth Increments for Sepia esculentas off Coast of East China Sea
方舟;俞骏;杨光明媚;韩霈武;
摘要(Abstract):
【目的】探究金乌贼(Sepia esculenta)的日周期性,以及角质颚和内壳微结构在金乌贼年龄鉴定中的相关关系。【方法】根据2018年9月至2019年3月在东海外海海域(123°-127°E,28.0°-31.5°N)采集金乌贼132尾,对其角质颚、内壳微结构轮纹进行分析判读,并通过线性拟合、差异化比较等非分析角质颚、内壳微结构的轮纹特征,探讨两者轮纹数间及其与胴长的相关关系。【结果】金乌贼角质颚喙部切面生长纹主要分布在头盖区与侧壁区,对称分布于喙部截面纵轴的两侧,其喙部头盖区的背侧生长纹较为完整。角质颚生长纹中还存在标记轮、亚日轮以及其他特殊生长纹结构;金乌贼内壳微结构纵切面的生长纹,从顶端延续到底端,生长纹长度也随之递减。内壳与角质颚生长纹数目为56~137,二者线性相关系数R=0.947 1。内壳、角质颚轮纹数与对应样本胴长分别线性相关。【结论】金乌贼角质颚、内壳微结构与日龄线性相关,可作为年龄鉴定材料,但应根据实际情况进行选择。
关键词(KeyWords): 金乌贼;角质颚;内壳;微结构;年龄鉴定
基金项目(Foundation): 国家重点研发计划(2019YFD0901404);; 国家自然基金面上项目(NSFC41876141);; 农业部外海渔业开发重点实验室开放课题(LOF 2021-01)
作者(Authors): 方舟;俞骏;杨光明媚;韩霈武;
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