Exploratory analysis based on morphological characters and landmarks in three species of grenadiers of the Macrouridae Family: Coelorinchus fasciatus, Macrourus holotrachys and Macrourus carinatus
Keywords:Morphological analysis, landmarks, Macrouridae
In order to identify Coelorinchus fasciatus, Macrourus holotrachys and M. carinatus, three grenadier species, 349 individuals were analyzed and 16 morphometric variables were explored using landmarks. Each variable was fitted considering the linearized allometry relationship eliminating the size effect. The null hypothesis of equal slopes was tested and the Principal Components Analysis (PCA) performed for each variable and each species. The results obtained allow to conclude that the major differences are found between C. fasciatus and M. carinatus. PCA detected those differences in the morphology of the cephalic region of species of the Coelorinchus and Macrourus genera. In M. holotrachys and M. carinatus, the two large grenadiers species, differences were found in the anterior portion of the head, specifically in the orbital region. The result of the length-weight relationship analysis between pairs of species showed disparities between C. fasciatus and M. carinatus.
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Copyright (c) 2015 Beatriz Jerez, Daniel Hernández
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