基于地标点法的3种眶灯鱼耳石形态种间差异性  

Interspecies differences in the otolith morphology of three Diaphus species based on landmark method

作　　者：庄文鑫 吴荔生[1] 刘巧红 柳淑芳[2] 丁少雄[1] Zhuang Wenxin;Wu Lisheng;Liu Qiaohong;Liu Shufang;Ding Shaoxiong(College of Ocean and Earth Sciences,Xiamen University,Xiamen 361100,China;Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Qingdao 266071,China)

机构地区：[1]厦门大学海洋与地球学院,福建厦门361100 [2]中国水产科学院黄海水产研究所,山东青岛266071

出　　处：《海洋学报》2023年第9期119-127,共9页

基　　金：青岛海洋科学与技术试点国家实验室山东省专项(2021QNLM050103-2);广东省基础与应用基础研究重大项目(2019B030302004)。

摘　　要：眶灯鱼属(Diaphus)是灯笼鱼科中物种丰度最高,种群数量最丰富的属之一,也是大洋中深层鱼类中的优势类群,但由于外部形态的高度相似,目前对眶灯鱼属的种类鉴定存在较多困难。为探究耳石地标点形态分析法(简称地标点法)在识别耳石形态相似、分布海域有较大重叠的眶灯鱼种间矢耳石差异的可行性,本文采集了分布于印度洋的西氏眶灯鱼(Diaphus thiollierei)和分布于南海的喀什眶灯鱼(D. garmani)和马来眶灯鱼(D. malayanus)的耳石应用地标点法进行形态分析。分析结果显示,3种眶灯鱼的矢耳石形态差异主要集中于内部听沟,内部标点贡献率达62%。网格差异可视化表明,西氏眶灯鱼矢耳石翼叶长度长于其他两种,而宽度则略窄。利用贝叶斯函数进行分类判别,结果表明西氏眶灯鱼判别成功率达到100%,而其余两种眶灯鱼则存在少量误判。此外,本研究结合样本栖息环境差异及相互间的亲缘关系,发现造成3种眶灯鱼矢耳石听沟形态差异的主要原因可能来源于所栖息海域的巨大盐度差异,但盐度影响矢耳石听沟形态的内在生理机制还需进一步研究。Diaphus is one of the genera with the highest species abundance and the most abundant population in the family Myctophidae,and it is also the dominant group of deep sea fishes in the ocean.However,due to the high similarity of external morphology,it is difficult to identify the lanternfish species.In order to explore the feasibil-ity of otoliths morphological analysis in identifying the otolith differences between Diaphus species with similar otoliths and large overlapping distribution areas,the otoliths of three Diaphus species were collected from the Indi-an Ocean and the South China Sea for morphometrics analysis with landmark method.The results showed that the morphological variation of sagittal otoliths in three lanternfishes were mainly in the internal main sulcus,and the internal punctuation contribution rate reached 62%.The grid difference visualization showed that the wing length of sagittal otoliths in D.thiollierei was longer than that of the other two species,while the width was slightly nar-rower.The Bayes function was used for classification and discrimination,and the results showed that the success rate of D.thiollierei was 100%,while the other two species had a few misjudgments.In addition,taking into ac-count the habitat environment and the genetic relationship between these three species,we supposed that the main reason for the morphological differences in the main sulcus of the three spescies was the huge salinity difference in the habitat sea area.However,the impact and physiological mechanism of salinity on the morphology of the main sulcus of sagittal otoliths needs to be further studied.

关 键 词：眶灯鱼 地标点法 耳石形态 

分 类 号：S917.4[农业科学—水产科学] P714.5[天文地球—海洋科学]