Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/2058
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dc.contributor.authorSlijepčević, Majaen_US
dc.contributor.authorGalis, Frietsonen_US
dc.contributor.authorArntzen, Janen_US
dc.contributor.authorIvanović, Anaen_US
dc.date.accessioned2019-10-21T11:48:23Z-
dc.date.available2019-10-21T11:48:23Z-
dc.date.issued2015-11-10-
dc.identifier.issn2167-8359-
dc.identifier.urihttps://biore.bio.bg.ac.rs/handle/123456789/2058-
dc.description.abstract© 2015 Slijepcević et al. We explored intraspecific variation in vertebral formulae, more specifically the variation in the number of thoracic vertebrae and frequencies of transitional sacral vertebrae in Triturus newts (Caudata: Salamandridae).Within salamandrid salamanders this monophyletic group shows the highest disparity in the number of thoracic vertebrae and considerable intraspecific variation in the number of thoracic vertebrae. Triturus species also differ in their ecological preferences, from predominantly terrestrial to largely aquatic. Following Geoffroy St. Hilaire's and Darwin's rule which states that structures with a large number of serially homologous repetitive elements are more variable than structures with smaller numbers, we hypothesized that the variation in vertebral formulae increases in more elongated species with a larger number of thoracic vertebrae. We furthermore hypothesized that the frequency of transitional vertebrae will be correlated with the variation in the number of thoracic vertebrae within the species.We also investigated potential effects of species hybridization on the vertebral formula. The proportion of individuals with a number of thoracic vertebrae different from the modal number and the range of variation in number of vertebrae significantly increased in species with a larger number of thoracic vertebrae. Contrary to our expectation, the frequencies of transitional vertebrae were not correlated with frequencies of change in the complete vertebrae number. The frequency of transitional sacral vertebra in hybrids did not significantly differ from that of the parental species. Such a pattern could be a result of selection pressure against transitional vertebrae and/or a bias towards the development of full vertebrae numbers. Although our data indicate relaxed selection for vertebral count changes in more elongated, aquatic species, more data on different selective pressures in species with different numbers of vertebrae in the two contrasting, terrestrial and aquatic environments are needed to test for causality.en_US
dc.description.sponsorshipSerbian Ministry of Education, Science, and Technological Developmenten_US
dc.description.sponsorshipSyntheSysen_US
dc.description.sponsorshipNaturalis Biodiversity Centeren_US
dc.language.isoenen_US
dc.relationDiversity of the amphibians and reptiles on the Balkan Peninsula: evolutionary and conservation aspectsen_US
dc.relationNL-TAF 1245en_US
dc.relationNL-TAF 3082en_US
dc.relationTemminck fellowshipen_US
dc.relation.ispartofPeerJen_US
dc.subjectAmphibiaen_US
dc.subjectAxial skeletonen_US
dc.subjectGeoffroy St. Hilaire's ruleen_US
dc.subjectSalamadersen_US
dc.subjectTransitional vertebraeen_US
dc.titleHomeotic transformations and number changes in the vertebral column of Triturus newtsen_US
dc.typeArticleen_US
dc.identifier.doi10.7717/peerj.1397-
dc.identifier.pmid26587355-
dc.identifier.scopus2-s2.0-84949682101-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/84949682101-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.fulltextWith Fulltext-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
crisitem.author.deptChair of Morphology, Systematics and Phylogeny of Animals-
crisitem.author.orcid0000-0002-6247-8849-
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