The evolution of mammalian brain size

被引：77

作者：

Smaers, J. B. ^{[1
,2
]}

Rothman, R. S. ^{[3
]}

Hudson, D. R. ^{[3
]}

Balanoff, A. M. ^{[4
,5
]}

Beatty, B. ^{[6
,7
]}

Dechmann, D. K. N. ^{[8
,9
]}

de Vries, D. ^{[10
]}

Dunn, J. C. ^{[11
,12
,13
]}

Fleagle, J. G. ^{[14
]}

Gilbert, C. C. ^{[6
,15
,16
,17
]}

Goswami, A. ^{[18
]}

Iwaniuk, A. N. ^{[19
]}

Jungers, W. L. ^{[14
,20
]}

Kerney, M. ^{[12
]}

Ksepka, D. T. ^{[21
,22
,23
,24
]}

Manger, P. R. ^{[25
]}

Mongle, C. S. ^{[2
,3
,26
]}

Rohlf, F. J. ^{[1
]}

Smith, N. A. ^{[23
,27
]}

Soligo, C. ^{[28
]}

Weisbecker, V ^{[29
]}

Safi, K. ^{[8
,9
]}

机构：

[1] SUNY Stony Brook, Dept Anthropol, Stony Brook, NY 11794 USA

[2] Amer Museum Nat Hist, Div Anthropol, New York, NY 10024 USA

[3] SUNY Stony Brook, Interdept Doctoral Program Anthropol Sci, Stony Brook, NY 11794 USA

[4] Johns Hopkins Univ, Dept Psychol & Brain Sci, Baltimore, MD 21218 USA

[5] Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA

[6] NYIT Coll Osteopath Med, Old Westbury, NY 11568 USA

[7] Smithsonian Inst, US Natl Museum, Washington, DC 20560 USA

[8] Max Planck Inst Anim Behav, Dept Migrat, D-78315 Radolfzell am Bodensee, Germany

[9] Univ Konstanz, Dept Biol, D-78464 Constance, Germany

[10] Univ Salford, Ecosyst & Environm Res Ctr, Sch Sci Engn & Environm, Manchester M5 4WX, Lancs, England

[11] Univ Cambridge, Div Biol Anthropol, Cambridge CB2 3QG, England

[12] Anglia Ruskin Univ, Behav Ecol Res Grp, Cambridge CB1 1PT, England

[13] Univ Vienna, Dept Cognit Biol, A-1090 Vienna, Austria

[14] SUNY Stony Brook, Dept Anat Sci, Stony Brook, NY 11794 USA

[15] Hunter Coll, Dept Anthropol, New York, NY 10065 USA

[16] CUNY, PhD Program Anthropol, Grad Ctr, 365 Fifth Ave, New York, NY 10016 USA

[17] New York Consortium Evolutionary Primatol, New York, NY 10065 USA

[18] Nat Hist Museum, Dept Life Sci, London SW7 5BD, England

[19] Univ Lethbridge, Dept Neurosci, Lethbridge, AB T1K 3M4, Canada

[20] Assoc Vahatra, BP 3972, Antananarivo 101, Madagascar

[21] Bruce Museum, Greenwich, CT 06830 USA

[22] Amer Museum Nat Hist, Dept Ornithol, New York, NY 10024 USA

[23] Field Museum Nat Hist, Div Sci & Educ, Chicago, IL 60605 USA

[24] Smithsonian Inst, Dept Paleobiol, Washington, DC 20013 USA

[25] Univ Witwatersrand, Fac Hlth Sci, Sch Anat Sci, Johannesburg, South Africa

[26] SUNY Stony Brook, Turkana Basin Inst, Stony Brook, NY 11794 USA

[27] Clemson Univ, Campbell Geol Museum, Clemson, SC 29634 USA

[28] UCL, Dept Anthropol, London WC1H 0BW, England

[29] Flinders Univ S Australia, Coll Sci & Engn, Bedford Pk, SA 5042, Australia

来源：

SCIENCE ADVANCES | 2021年 / 7卷 / 18期

基金：

欧洲研究理事会; 美国国家科学基金会; 英国自然环境研究理事会; 芬兰科学院; 澳大利亚研究理事会;

关键词：

Mammals;

D O I：

10.1126/sciadv.abe2101

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：11

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