Dr. Jorge Chollet-Villalpando,
Lab. de Morfometría,
Bodiversidad y Sistemática, INECOL
- Agosto 2018 a Julio 2019
(Extensión de beca por segundo año).
- Agosto 2017 a Julio 2018.
Beca CONACYT, programa de apoyo al Posgrado.Chollet-Villalpando JG, FJ García-Rodríguez, E De Luna, J De La Cruz-Agüero. Geometric morphometrics for the analysis of character variation in size and shape of the sulcus acusticus of sagittae otolith in species of Gerreidae (Teleostei: Perciformes). MARINE BIODIVERSITY.
Proyecto: "Morfometría y filogenia de la familia Gerreidae (Teleostei: Perciformes)."
Sagittal otoliths have been deemed as an appropriate structure to distinguish teleostean fishes. However, character variation in size and shape of the sulcusacusticushas not been tested among Gerreidae Günther, 1859 species. For the first time, this paper explores the size and shape variation in the sulcus acusticususing landmark data and geometric morphometric methods. Our findings show that variation in the sulcusacusticussize, as estimated with centroid size, is not a useful feature to distinguish neither the five genera nor all species in this study. However, since analyses of variance followed by Tukey a posterioritests detect differences among groups of species, it is possible that the size of the sulcus acusticuswill still be useful as a phylogenetic character. In contrast, the pattern of variation in the shape of the sulcusacusticusconsists of well-defined character states exclusive of each of the 18 species of Gerreidae included. All comparisons in multivariate analyses of variance of semi-landmark configurations with a CVA were statistically significant, and the rates forcorrect posterior classifications were all above 79%. Discriminant axes allowed to locate variation in particular regions of the sulcus acusticusoutline that contribute most to the distinction among genera. Results revealed species in the same genus share a particular shape in the ostium and posterior extension of the cauda. Variation in the shape of the sulcusacusticusis, therefore, a very useful character to identify species in Gerreidae.
Keywords: Character states, landmark data, morphological variation, silver biddies
SCOPUS ID: https://www.scopus.com/authid/detail.uri?authorId=37072053800
Curso de Morfometria Geométrica,
Posgrado del INECOL, Xalapa.