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  The evolution of mammalian brain size

Smaers, J. B., Rothman, R. S., Hudson, D. R., Balanoff, A. M., Beatty, B., Dechmann, D. K. N., et al. (2021). The evolution of mammalian brain size. Science Advances, 7(18): eabe2101. doi:10.1126/sciadv.abe2101.

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Smaers, J. B., Autor
Rothman, R. S., Autor
Hudson, D. R., Autor
Balanoff, A. M., Autor
Beatty, B., Autor
Dechmann, Dina K. N.1, Autor           
de Vries, D., Autor
Dunn, J. C., Autor
Fleagle, J. G., Autor
Gilbert, C. C., Autor
Goswami, A., Autor
Iwaniuk, A. N., Autor
Jungers, W. L., Autor
Kerney, M., Autor
Ksepka, D. T., Autor
Manger, P. R., Autor
Mongle, C. S., Autor
Rohlf, F. J., Autor
Smith, N. A., Autor
Soligo, C., Autor
Weisbecker, V., AutorSafi, Kamran1, Autor            mehr..
Affiliations:
1Department of Migration, Max Planck Institute of Animal Behavior, Max Planck Society, ou_3054975              

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 Zusammenfassung: Relative brain size has long been considered a reflection of cognitive capacities and has played a fundamental role in developing core theories in the life sciences. Yet, the notion that relative brain size validly represents selection on brain size relies on the untested assumptions that brain-body allometry is restrained to a stable scaling relationship across species and that any deviation from this slope is due to selection on brain size. Using the largest fossil and extant dataset yet assembled, we find that shifts in allometric slope underpin major transitions in mammalian evolution and are often primarily characterized by marked changes in body size. Our results reveal that the largest-brained mammals achieved large relative brain sizes by highly divergent paths. These findings prompt a reevaluation of the traditional paradigm of relative brain size and open new opportunities to improve our understanding of the genetic and developmental mechanisms that influence brain size.

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 Datum: 2021-04-28
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1126/sciadv.abe2101
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Titel: Science Advances
  Andere : Sci. Adv.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Washington : AAAS
Seiten: - Band / Heft: 7 (18) Artikelnummer: eabe2101 Start- / Endseite: - Identifikator: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548