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

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 th...

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Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 33; no. 4; p. 1137
Main Authors Wei, Lian, Qian, Hu-Rui, Yang, Dan, Somhlaba, Sobahle, Zhu, Guo-Ping
Format Journal Article
LanguageChinese
Published China 01.04.2022
Subjects
elliptic Fourier descriptor
morphology
linear discriminant analysis
geometric morphometrics
otolith
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Summary: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 discrimi
ISSN:1001-9332
DOI:10.13287/j.1001-9332.202204.029