基于形态分析探究鳞头犬牙南极鱼各生活史阶段耳石形态变化

doi:10.13287/j.1001-9332.202204.029

应用生态学报 ›› 2022, Vol. 33 ›› Issue (4): 1137-1144.doi: 10.13287/j.1001-9332.202204.029

基于形态分析探究鳞头犬牙南极鱼各生活史阶段耳石形态变化

魏联^1,2,3, 钱胡蕊¹, 杨丹^1,2,3, Sobahle Somhlaba⁴, 朱国平^1,2,3,5*

¹上海海洋大学海洋科学学院, 上海 201306;
²上海海洋大学极地研究中心, 上海 201306;
³上海海洋大学大洋渔业资源可持续开发教育部重点实验室极地海洋生态系统研究室, 上海 201306;
⁴Department of Forestry, Fisheries and the Environment, Cape Town 7700, Republic of South Africa;
⁵国家远洋渔业工程研究中心, 上海 201306

收稿日期:2021-05-22 接受日期:2021-12-17 出版日期:2022-04-15 发布日期:2022-10-15
通讯作者: * E-mail: gpzhu@shou.edu.cn
作者简介:魏联, 女, 1992年生, 博士研究生。主要从事海洋生物学研究。E-mail: weilian_1992@126.com
基金资助:
中国科协双边学术交流活动项目(2020ZZGJB060926)、国家留学基金委员会促进与加澳新及拉美地区科研合作与高层次人才培养项目(2021-109)、国家自然科学基金项目(41776185)和国家重点研发计划项目(2018YFC1406801)资助

Using shape analysis to inform variation in otolith morphology with life stages of Dissostichus mawsoni

WEI Lian^1,2,3, QIAN Hu-rui¹, YANG Dan^1,2,3, SOMHLABA Sobahle⁴, ZHU Guo-ping^1,2,3,5*

¹College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
²Center for Polar Research, Shanghai Ocean University, Shanghai 201306, China;
³Laboratory of Polar Marine Ecosystem, Ministry of Education Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Shanghai 201306, China;
⁴Department of Forestry, Fisheries and the Environment, Cape Town 7700, Republic of South Africa;
⁵National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China

Received:2021-05-22 Accepted:2021-12-17 Online:2022-04-15 Published:2022-10-15

摘要/Abstract

摘要： 鳞头犬牙南极鱼为南极最为重要的底层鱼类,具有重要的生态作用和极高的商业价值,鱼类耳石形态随着生活史过程的推移有所差异,故耳石形态分析可用于推断鳞头犬牙南极鱼的生活史过程。本研究利用采集自南极罗斯海、阿蒙森海、威德尔海及拉扎列夫海120尾分属4个生活史阶段的鳞头犬牙南极鱼耳石,结合传统测量分析与椭圆傅里叶分析两种形态学研究方法,对其各生活史阶段耳石形态的差异进行研究。结果表明: 鳞头犬牙南极鱼各生活史阶段耳石形态存在差异,随着生活史过程的推移,耳石的变化趋势为整体上由轮廓平滑、复杂度较低向轮廓曲折、高度复杂化转变,且纵轴方向增长速度低于横轴方向,翼叶等特征部位变化显著。针对耳石形态的线性判别分析结果显示,椭圆傅里叶分析判别值较高,为85.4%,而传统测量分析判别值较低,为71.9%,表明相较于传统测量分析,椭圆傅里叶分析更具优势。

关键词: 传统测量分析, 椭圆傅里叶分析, 耳石, 形态学, 线性判别分析

Abstract: As the most important domestic fish in the Antarctic Ocean, Antarctic toothfish (Dissostichus mawsoni) has an important ecological role and high commercial value. The otolith morphology of fish species differs across stages of life history. Therefore, otolith shape analysis can be used to infer life history of D. mawsoni. In this study, otoliths from 120 D. mawsoni individuals with four life stages randomly collected from the Ross Sea, Amundsen Sea, Weddell Sea and Lazarev Sea were used to analyze the otolith morphological differences of D. mawsoni at life stages by conventional measurement and elliptical Fourier analysis. The results showed that variation in otolith morphology occurred across life stages. Generally, the morphology of otolith was changed from smooth and low comple-xity to zigzagging and high complexity. The growth rate of otolith along the longitudinal direction was lower than that along the transverse direction. The characteristic parts of otolith, such as antirostrum, changed significantly across life stages. Compared to the linear discriminant analysis (71.9%), the elliptical Fourier analysis had the higher discrimination rate (85.4%), indicating that the elliptical Fourier analysis was more suitable to analyze the otolith morphology of D. mawsoni.

Key words: geometric morphometrics, elliptic Fourier descriptor, otolith, morphology, linear discriminant analysis

魏联, 钱胡蕊, 杨丹, Sobahle Somhlaba, 朱国平. 基于形态分析探究鳞头犬牙南极鱼各生活史阶段耳石形态变化[J]. 应用生态学报, 2022, 33(4): 1137-1144.

WEI Lian, QIAN Hu-rui, YANG Dan, SOMHLABA Sobahle, ZHU Guo-ping. Using shape analysis to inform variation in otolith morphology with life stages of Dissostichus mawsoni[J]. Chinese Journal of Applied Ecology, 2022, 33(4): 1137-1144.

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基于形态分析探究鳞头犬牙南极鱼各生活史阶段耳石形态变化

Using shape analysis to inform variation in otolith morphology with life stages of Dissostichus mawsoni

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