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Title

Comparison of different otolith shape descriptors and morphometrics for the identification of closely related species of Lutjanus spp. from the Persian Gulf

AuthorsSadighzadeh, Zahra; Tuset, Víctor M. ; Valinassab, Tooraj; Dadpour, Mohammad R.; Lombarte, Antoni
KeywordsOtolith
Morphology
Fourier
Wavelets
Lutjanidae
Persian Gulf
Issue DateAug-2012
PublisherTaylor & Francis
CitationMarine Biology Research 8(9): 802-814 (2012)
AbstractThe anatomical and morphometric (shape indices, contour descriptors and otolith weight) characterizations of sagittal otoliths were investigated in 11 species of Lutjanus spp. inhabiting the Persian Gulf. This is the first study that compares the efficiency of three different image analysis techniques for discriminating species based on the shape of the outer otolith contour, including elliptical Fourier descriptors (EFD), fast Fourier transform (FFT) and wavelet transform (WT). Sagittal otoliths of snappers are morphologically similar with some small specific variations. The use of otolith contour based on wavelets (WT) provided the best results in comparison with the two other methods based on Fourier descriptors, but only the combination of the all three methods (EFD, FFT and WT) was useful to obtain a robust classification of species. The species prediction improved when otolith weight was included. In relation to the shape indices, only the aspect ratio provided a clear grouping of species.
Description13 pages, 6 figures, 2 tables.
Publisher version (URL)http://dx.doi.org/10.1080/17451000.2012.692163
URIhttp://hdl.handle.net/10261/56295
DOI10.1080/17451000.2012.692163
ISSN1745-1000
E-ISSN1745-1019
Appears in Collections:(ICM) Artículos
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