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Identifying Mediterranean Sea gobies using otoliths

AutorLombarte, Antoni ; Miletić, M.; Kovacic, Marcelo; Otero-Ferrer, Jose Luís; Tuset, Víctor M.
Fecha de publicación21-oct-2014
EditorInternational Council for the Exploration of the Sea
Citación5th International Otolith Symposium. Book Abstracts: 119 (2014)
ResumenA total of 234 sagittal otoliths from 25 Mediterranean (North Western area and Adriatic Sea) gobiids species were anatomically described and morphometrically analysed to determine the usefulness and efficiency of sagittae in the identification of species. This group of fishes is ones of largest Mediterranean Teleostean families characterizing by a high taxonomic complexity. The analysis of contour otolith was based on the mathematical descriptor called wavelet (WT). Two methods of classification were used in basis wavelets functions: an iterative system based in 10 wavelets that searches on AFORO database; and a discriminant method based in WT number 5. With exception of paedomorfic species, the results showed that otolith anatomy and morphometry can be used as diagnostic character of the three Mediterranean phylogenetic lineages (Pomatoschistus-lineage or sand gobiids, Aphia-lineage-gobiids and Gobius-lineage). The main anatomical differences of the otoliths were related to general shape (squared to rhomboidal), the development and shape of postero-dorsal and antero-ventral lobes and the degree of convexity of dorsal and ventral margins. In basis to morphometry of otolith contour, iterative classifications and discriminant analysis showed very similar results. In both cases more of 70 % specimens were correctly classified at species level and more of 80% at genus level. Iterations on AFORO database (including 216 families of Teleostean fishes) give a 100% of correct classification at family level. These high differentiated otoliths shape respect other Perciformes families support the most recent molecular data that propose recognition of gobiids and related groups as a new taxonomic order, Gobiiformes, separated of the main Perciformes taxa
Descripción5th International Otolith Symposium (IOS2014), 20-24 October 2014, Mallorca, Balearic Islands Spain.-- 1 page
Versión del editorhttp://www.ices.dk/news-and-events/symposia/otolith/Pages/Programme.aspx
Aparece en las colecciones: (ICM) Comunicaciones congresos
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