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Title: | Ontogeny of skull size and shape changes within a framework of biphasic lifestyle: a case study in six Triturus species (Amphibia, Salamandridae) | Authors: | Ivanović, Ana Vukov, Tanja Džukić, Georg Tomašević Kolarov, Nataša |
Keywords: | Geometric morphometrics;Skull shape;Allometry;Developmental rate;Phylogeny;Geometrijska morfometrija;Oblik lobanje;Alometrija;Filogenija;Stopa razvoja | Issue Date: | Sep-2007 | Project: | “Patterns of amphibian and reptile diversity on the Balkan Peninsula,” grant 143052 | Journal: | Zoomorphology | Abstract: | As with many other amphibians, Triturus species are characterized by a biphasic life cycle with abrupt changes in the cranial skeleton during metamorphosis. The post-metamorphic shape changes of the cranial skeleton were investigated using geometric morphometric techniques in six species: Triturus alpestris, T. vulgaris, T. dobrogicus, T. cristatus, T. carnifex, and T. karelinii. The comparative analysis of ontogenetic trajectories revealed that these species have a conserved developmental rate with divergent ontogenetic trajectories of the ventral skull shape that mainly reflect phylogenetic relatedness. A striking exception in the ontogenetic pattern was possibly found in T. dobrogicus, characterized by a marked increase in the developmental rate compared to the other newt species. The size-related shape changes explained a large proportion of shape change during post-metamorphic growth within each species, with marked positive allometric growth of skull elements related to foraging. |
URI: | https://biore.bio.bg.ac.rs/handle/123456789/3449 | DOI: | 10.1007/s00435-007-0037-1 |
Appears in Collections: | Journal Article |
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