Morphometric variation of fish scales among some species of the family Lutjanidae from Iranian waters

作者：Ibanez Ana L^*; Jawad Laith A; Sadighzadeh Zahra

来源：Cahiers de Biologie Marine, 2016, 57(4): 289-295.

• Geometric morphometrics
• Landmarks
• Scale Morphology
• Lutjanidae
• Discrimination

We used geometric morphometric methods on shape of fish scales to assess differences in shape among species and genera. We also compared the method with traditional phylogenetic approaches. Scale form was described using five landmarks, the coordinates of which were subjected to generalized Procrustes analysis, followed by principal component analysis. Cross validated discriminant analysis was used to assess and compare the efficacy of shape and relative warp in size-shape space (centroid size plus shape variables). The cross-validated canonical discriminant analysis correctly classified 79.0% for genus. Most misclassifications occurred between the Lutjanus species, with only 76.7% of correct classifications (especially with the genus Pristipomoides), whereas the genera Pinjalo and Pristipomoides showed 100.0% and 76.9% of correct classification, respectively. The discrimination of species correctly classified ranged between 64.3% and 100.0%. The highest correct classification rates were found among species of the genera Pinjalo, and the Lutjanus johni and L. lutjanus species. Agreement could be found between scale shape and phylogenetic analysis.

• 出版日期2016