作者: María Constanza Marchesi , Matías S. Mora , Silvana L. Dans , Rolamdo González-José
DOI: 10.1007/S10914-020-09514-9
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摘要: Commerson’s dolphin (Cephalorhynchus commersonii), Peale’s (Lagenorhynchus australis), dusky obscurus), and hourglass cruciger) are closely related species occurring in the Southern Hemisphere. Even though they partially sympatric, have evolved towards diverse foraging strategies, prey, habitat preferences. Size variation occurs both among within species. Our goal was to study allometric patterns ontogenetic trajectories vertebral column of these dolphins their ecology. We choose nine functionally homologous vertebrae each digitized five different tridimensional configurations, containing 28 41 landmarks depending on functional region under analysis. explored levels allometry (static, ontogenetic, evolutionary) using multivariate regressions shape vs. log-transformed centroid size. compared regression vectors evidence differences growth patterns. Finally, we calculated Procrustes distances configurations determine timing shifts. Of studied species, When Lagenorhynchus showed highest degrees allometry, static ontogenetic. The macroevolutive trends indicate a high degree evolutionary morphological change, which could be associated with rapid radiation proposed for group. This is first time that changes small cetaceans by means 3D geometric morphometrics.