Wei Lian, Qian Hu-Rui, Yang Dan, Somhlaba Sobahle, Zhu Guo-Ping
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; Center for Polar Research, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Polar Marine Ecosystem, Ministry of Education Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Shanghai 201306, China.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China.
Ying Yong Sheng Tai Xue Bao. 2022 Apr;33(4):1137-1144. doi: 10.13287/j.1001-9332.202204.029.
As the most important domestic fish in the Antarctic Ocean, Antarctic toothfish () 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 . In this study, otoliths from 120 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 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 .
南极犬牙鱼作为南大洋最重要的本土鱼类，具有重要的生态作用和较高的商业价值。鱼类的耳石形态在其生活史的不同阶段存在差异。因此，耳石形状分析可用于推断南极犬牙鱼的生活史。在本研究中，从罗斯海、阿蒙森海、威德尔海和拉扎列夫海随机采集了处于四个生活阶段的120尾南极犬牙鱼个体的耳石，通过常规测量和椭圆傅里叶分析来分析南极犬牙鱼在不同生活阶段的耳石形态差异。结果表明，耳石形态在不同生活阶段存在变化。总体而言，耳石形态从平滑且复杂度低转变为锯齿状且复杂度高。耳石沿纵向的生长速率低于沿横向的生长速率。耳石的特征部位，如吻背，在不同生活阶段有显著变化。与线性判别分析（71.9%）相比，椭圆傅里叶分析具有更高的判别率（85.4%），表明椭圆傅里叶分析更适合用于分析南极犬牙鱼的耳石形态。
