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- Title
Comparative analysis of otolith morphology in three species of <italic>Scomber</italic>.
- Authors
He, Tao; Cheng, Jiao; Qin, Jian-guang; Li, Yun; Gao, Tian-xiang
- Abstract
Geometric morphometrics is a quick and reliable approach to differentiate fish stocks based on the variation of otolith shapes. In this study, morphometric analysis of otolith shapes was used to differentiate three species of <italic>Scomber</italic>. The sagittae morphology of <italic>S. scombrus</italic> otolith is totally different from that of <italic>S. japonicus</italic> and <italic>S. australasicus</italic>. Multivariate analysis consistently showed that <italic>S. japonicus</italic> was morphologically similar to <italic>S. australasicus</italic>, whereas a significant difference in otolith shapes was detected between <italic>S. scombrus</italic> and other two species of <italic>Scomber</italic>. The rostrum, antirostrum, excisural notch and dorsal-posterior margin of the otolith reflect the main variations between the three species of <italic>Scomber</italic>. Shape indices and Fourier coefficients were used to discriminate fish species using analysis of variance and Fisher discriminant analysis. The shape indices successfully differentiated 100%, 95.7% and 96.4% of otoliths in <italic>S. japonicus</italic>, <italic>S. australasicus</italic> and <italic>S. scombrus</italic>, respectively, while the Fourier coefficients only discriminated 70.0%, 61.9% and 91.3% of the sagittae in <italic>S. japonicus</italic>, <italic>S. australasicus</italic> and <italic>S. scombrus</italic>. This study indicates that the shape analysis on the sagittae morphometrics of otoliths is a better method to differentiate species of <italic>Scomber</italic>.
- Subjects
OTOLITHS; FISH morphology; MORPHOMETRICS; SCOMBER; ICHTHYOLOGY
- Publication
Ichthyological Research, 2018, Vol 65, Issue 2, p192
- ISSN
1341-8998
- Publication type
Article
- DOI
10.1007/s10228-017-0605-4