[MARMAM] New publication

Mariana Viglino viglinomariana at yahoo.com.ar
Fri Oct 3 12:23:20 PDT 2014

Dear Colleagues,

We are pleased to announce the publication of the following article:

Viglino, M., Flores, D. A., Ercoli, M. D. and Álvarez, A. (2014), Patterns of morphological variation of the vertebral column in dolphins. Journal of Zoology. doi: 10.1111/jzo.12177

Cetaceans swim by the alternate action of their epiaxial and hypaxial muscles and their propulsive movements are confined to the vertical plane. Changes in the shape and mechanical properties of vertebrae strongly affect their function during oscillatory swimming. The first objective of this study was to provide a quantitative characterization of vertebral morphology in representatives of the Delphinidae and Pontoporiidae families. A novel morphometric approach was applied, using nine vertebral measurements and three indices. The second objective was to assess the relationship between morphology and both habitat and size through regression analyses. The phylogenetic structure of the distribution of characters was also explored by estimating phylogenetic signal. No relationship was found between morphology and habitat or size, but vertebral measurements and indices showed a significant phylogenetic signal. Morphological profiles indicated that coastal and
 oceanic delphinid species had a conservative regionalization of the vertebral column. All delphinid species showed discoidal centra morphology, while Pontoporia blainvillei presented a spool-shaped morphology. Differences in vertebral morphology and inferred muscular architecture between P. blainvillei and delphinids could indicate distinct dynamics of vertebral movement during swimming. However, other complex and specific functional relationships and life-history traits may also be influencing vertebral morphology. The detailed study of the complex evolutionary history of lineages could bring to light other clarifying dimensions for understanding morphological evolution in odontocetes.

The article can be access via http://onlinelibrary.wiley.com/doi/10.1111/jzo.12177/pdf
or by requesting an electronic reprint from viglinomariana at yahoo.com.ar

Thank you!

Mariana Viglino
Lic. Mariana Viglino
Laboratorio de Paleontología
Centro Nacional Patagónico - CONICET
Boulevard Brown 2915 - U9120ACD
Puerto Madryn - Chubut
Tel: (+54) 0280-4883184 - Int: 1327
Fax: (+54) 0280-4883543
viglinomariana at yahoo.com.ar
viglino at cenpat-conicet.gob.ar
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