A new otolith image contour descriptor based on partial reflection
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Document typeArticle
Defense date2010-12
Rights accessRestricted access - publisher's policy
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Abstract
In this paper we propose a new contour
descriptor for reconstructing fish otolith contours that
uses half the number of coefficients needed by the
classical elliptical Fourier descriptors (EFDs) for the
same accuracy. The efficiency of the proposed shape
descriptor has been tested with two different species,
Liza aurata and Liza ramada, belonging to the family
Mugilidae (http://aforo.cmima.csic.es), and two populations
(from the USA and Canada) of the family
Merlucciidae. These groups are characterized by high
similarity between species; therefore, accurate, detailed
shape analyses of their otoliths can help to identify and
discriminate morphologically close species or different
populations. For comparative purposes the descriptor
was also tested with specimens of Mullus barbatus
(Family Mullidae). For a certain number of coefficients
(<50) the new descriptor clearly outperforms the
reconstruction accuracy of the EFD.
CitationReig, R. [et al.]. A new otolith image contour descriptor based on partial reflection. "Environmental biology of fishes", Desembre 2010, vol. 89, núm. 3-4, p. 579-590.
ISSN0378-1909
Publisher versionhttp://www.springerlink.com/index/XP7672Q7256603UM.pdf
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