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Breakdown of brain-...
Breakdown of brain-body allometry and the encephalization of birds and mammals
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- Tsuboi, Masahito (författare)
- Stockholms universitet,Zoologiska institutionen,University of Oslo, Norway; The Graduate University of Advanced Studies, Japan
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- van der Bijl, Wouter (författare)
- Stockholms universitet,Zoologiska institutionen
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Kopperud, Bjørn Tore (författare)
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Erritzøe, Johannes (författare)
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Voje, Kjetil L. (författare)
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- Kotrschal, Alexander (författare)
- Stockholms universitet,Zoologiska institutionen
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Yopak, Kara E. (författare)
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Collin, Shaun P. (författare)
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Iwaniuk, Andrew N. (författare)
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- Kolm, Niclas (författare)
- Stockholms universitet,Zoologiska institutionen
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(creator_code:org_t)
- 2018-08-13
- 2018
- Engelska.
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Ingår i: Nature Ecology & Evolution. - : Springer Science and Business Media LLC. - 2397-334X. ; 2:9, s. 1492-1500
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- The allometric relationship between brain and body size among vertebrates is often considered a manifestation of evolutionary constraints. However, birds and mammals have undergone remarkable encephalization, in which brain size has increased without corresponding changes in body size. Here, we explore the hypothesis that a reduction of phenotypic integration between brain and body size has facilitated encephalization in birds and mammals. Using a large dataset comprising 20,213 specimens across 4,587 species of jawed vertebrates, we show that the among-species (evolutionary) brain-body allometries are remarkably constant, both across vertebrate classes and across taxonomic levels. Birds and mammals, however, are exceptional in that their within-species (static) allometries are shallower and more variable than in other vertebrates. These patterns are consistent with the idea that birds and mammals have reduced allometric constraints that are otherwise ubiquitous across jawed vertebrates. Further exploration of ontogenetic allometries in selected taxa of birds, fishes and mammals reveals that birds and mammals have extended the period of fetal brain growth compared to fishes. Based on these findings, we propose that avian and mammalian encephalization has been contingent on increased variability in brain growth patterns.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
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- art (ämneskategori)
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Tsuboi, Masahito
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van der Bijl, Wo ...
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Kopperud, Bjørn ...
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Erritzøe, Johann ...
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Voje, Kjetil L.
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Kotrschal, Alexa ...
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visa fler...
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Yopak, Kara E.
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Collin, Shaun P.
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Iwaniuk, Andrew ...
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Kolm, Niclas
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visa färre...
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Stockholms universitet