491:. This idea is controversial and has been criticised by others that support the original thrifty gene hypothesis. A test of the ideas involved searching for signatures of selection at loci linked to body mass index and showed consistent with the ‘drifty’ but not ‘thrifty’ gene ideas there was no evidence of strong selection at these loci. Since 2018 he has published a series of studies of responses of mice to different diets, disputing the popular carbohydrate insulin model of obesity, This work culminated in a perspective article in Science with co-author Kevin D. Hall (in 2021) highlighting the inadequacies of the carbohydrate insulin model. In 2023 he led a paper using data from the DLW database which showed total energy expenditure has declined over the last 35 years surprisingly this was traced down to a reduction in basal metabolic rate rather than a decline in physical activity expenditure, which has actually increased.
468:, published in 1997 that remains the standard reference work for applications of this methodology in humans and other animals. Since 2018 he has been the chairman of the International Atomic Energy Agency doubly-labelled water database management committee, which manages a database of over 7500 measurements of human subjects made using the DLW method. A paper by Pontzer, Yamada and colleagues utilising this database, on which Speakman was a co-corresponding author, summarised the metabolic rates of humans between 8 days and 96 years old, was published in Science in August 2021.
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526:, effects of climate change etc. The idea is revolutionary because it shifts the fundamental locus of control over energy expenditure from extrinsic factors outside the animal (e.g. food supply, fractal supply system, uptake capacity), to intrinsic factors inside an animal (heat dissipation capacity). An independent review of studies of energy expenditure concluded that the HDL hypothesis provided a better explanation of the patterns of energy expenditure in endotherms than does the
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in animals. Between 2011-2020, he was a '1000 talents' Professor at the
Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, in Beijing, China, where he ran the molecular energetics group. In 2020 he moved to the Shenzhen Institutes of Advanced Technology, Chinese
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Speakman writes a monthly popular science column for the magazine ‘Newton’ (translated into
Chinese by an ex-student Lina Zhang) and has also published three popular science books consisting of the compiled English versions of these articles.
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in 2010. The idea is claimed to have wide implications for our understanding of many aspects of ecophysiology and ecology – such as limits on range distributions, maximum possible sizes of endothermic animals e.g. dinosaurs,
515:, which culminated in a novel hypothesis that animal energy expenditure is limited by the capacity to dissipate body heat. This idea – the "heat dissipation limit hypothesis" (HDL) was published by Speakman and Krol in the
388:, Institute of Biological and Environmental Sciences, for which he was Director from 2007 to 2011. He leads the University's Energetics Research Group, which is one of the world's leading groups using
627:• 2020 Elected foreign member of the US National Academy of Sciences. He is one of only 28 scientists in the world to be simultaneously a fellow of the UK, US and Chinese National academies.1.
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A. M. Prentice, B. J. Hennig and A. J. Fulford. (2008). Evolutionary origins of the obesity epidemic: natural selection of thrifty genes or genetic drift following predation release?
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Speakman's work focuses on the causes and consequences of variation in energy balance, and in particular the factors that limit expenditure, the genetic and environmental drivers of
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Speakman, J.R. and Krol, E (2010) Maximal heat dissipation capacity and hyperthermia risk: neglected key factors in the ecology of endotherms
Journal of Animal Ecology 79: 726-746
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Academy of
Sciences in Shenzhen, China where he works at the Center for Energy Metabolism and Reproduction and Head of the Shenzhen Key laboratory of Metabolic Health.
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J. R. Speakman, K. A. Rance and A. M. Johnstone. (2008). Polymorphisms of the FTO gene are associated with variation in energy intake, but not energy expenditure.
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Hudson, L.N. et al (2013) The relationship between body mass and field metabolic rate among individual birds and mammals. Journal of Animal
Ecology 82: 1009-2020
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Speakman, J.R. (2015) How dogs make us fall in love with them and eleven other short stories from the frontiers of bioscience 2015. Createspace publishing
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Speakman, J.R. (2014) Pandas – dead end or dead wrong? and eleven other short stories from the frontiers of bioscience, 2014. Create space publishing
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Gremillet et a. (2012) Heat dissipation limit theory and the evolution of avian functional traits in a warming world. Functional eology 26: 1001-1006
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1247:"John Speakman - PhD DSc - Institute of Genetics and Developmental Biology, CAS, Beijing - State Key Laboratory of Molecular Developmental Biology"
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J. R. Speakman. (2008). Thrifty genes for obesity, an attractive but flawed idea, and an alternative perspective: the 'drifty gene' hypothesis.
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Genetics, John
SpeakmanInstitute of; Biology, Developmental; DSc, CAS · State Key Laboratory of Molecular Developmental Biology 70 95 · PhD.
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Speakman, J.R. (2006). The genetics of obesity: five fundamental problems with the famine hypothesis. In G. Fantuzzi, and T. Mazzone, (Eds)
573:• 1991 Elected Fellow of the UK Institute of Biology, later renamed the Society of Biology and latterly the Royal Society of Biology (FRSB)
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J. R. Speakman. (2007). A nonadaptive scenario explaining the genetic predisposition to obesity: the "predation release" hypothesis.
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During the mid-1980s and early 1990s, Speakman made many contributions to the development of the DLW method, culminating in the book
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1033:"Total daily energy expenditure has declined over the last 3 decades due to declining basal expenditure, not activity expenditure"
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methodologies to measure energy demands and has used these methods on a wide range of wild animals, model species and humans.
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631:• 2020 Honorary professor, School of food science, Beijing Technology and Business University, Beijing, China
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595:• 2010 Bing Zhi forum Professor of the Chinese Academy of Sciences Institute of Zoology in Beijing.
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With
Aberdeen colleague Ela Krol, among others, he has published a series of over 30 papers in the
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and the energetic contribution to ageing. He is an internationally recognised expert in the use of
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One or more of the preceding sentences incorporates text from the royalsociety.org website where:
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617:• 2017 Elected a fellow of the American Association for the Advancement of Science (AAAS)
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621:• 2018 Associate member of the Institute of Mathematics and its applications (AMIMA)
615:• 2016 Royal Society Wolfson Research Merit Award from the Royal Society of London.
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585:• 2005 Kwarazimi International festival prizewinner, International guest of honour
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647:• 2023 Dale medalist, The highest accolade of the UK Society for Endocrinology
643:• 2022 Honorary professor, China Medical University, Shenyang, Liaoning, China.
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601:• 2011 Awarded 1000 talents A professorship, Chinese Academy of Sciences
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641:• 2021 Honorary adjunct professor, Yantai university, Shandong, China.
633:• 2020 TOPS award the premier research award by the US Obesity Society
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in 2009. in 2017 he obtained a BSc in Maths and
Statistics from the
579:• 1999 Royal Society (London) Leverhulme Trust Research Fellowship.
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where he was awarded a BSc in
Biology and Psychology in 1980 and a
645:• 2022 Lazarow lecture, University of Minnesota, Minneapolis, USA.
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1311:"BingZhi Forum-Institute of Zoology Chinese Academy of Sciences"
593:• 2009 Elected Fellow the Royal Society of Arts in London (FRSA)
589:• 2007 Royal society of Edinburgh Lloyds TSB research fellowship
1337:"Institute of Arctic Biology::Irving-Scholander Lecture Series"
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619:• 2017 Elected fellow of the Royal Society of Statistics (FRSS)
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591:• 2008 Elected Fellow UK Academy of Medical Sciences (FMedSci)
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from the article and its talk page, especially if potentially
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637:• 2021 Dokmanovic lecture, Columbia University, New York USA.
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Pontzer H, Yamada Y, Sagayama H, et al. (August 2021).
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Fellows of the
Academy of Medical Sciences (United Kingdom)
599:• 2011 Clive McCay endowment lecture at Cornell University
498:
to differences in food consumption in humans by examining
405:
422:
887:"Daily energy expenditure through the human life course"
1286:"John Speakman - University of Aberdeen - Academia.edu"
583:• 2004 Elected Fellow Royal Society of Edinburgh (FRSE)
1904:
Foreign associates of the National Academy of Sciences
838:
Creative Commons Attribution 4.0 International License
700:
The energetics of foraging in wading birds (Charadrii)
609:• 2014 Honorary professor, University of Dali (Yunnan)
425:
in 1984 for research on the energetics of foraging in
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The energetics of foraging in wading birds (Charadrii)
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Biologist and professor at the University of Aberdeen
629:• 2020 Elected a Fellow of the Linnean Society (FLS)
575:• 1995 Zoological Society of London scientific medal
967:
Adipose tissue and adipokines in health and disease
623:• 2018 Elected a Fellow of the Royal Society (FRS)
19:For the British politician and trade unionist, see
1899:Foreign members of the Chinese Academy of Sciences
1894:Royal Society Wolfson Research Merit Award holders
597:• 2011 Fellow European Academy (Academia Europaea)
502:variation in the fat mass and obesity associated
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605:• 2014 Fellow of The Obesity Society in the US
565:published by Oxford University Press in 2020.
23:. For the American lawyer and politician, see
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842:Royal Society Terms, conditions and policies
1270:: CS1 maint: numeric names: authors list (
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1221:"Publications - Energetics Research Group"
862:Doubly labelled water: theory and practice
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466:Doubly labelled water: theory and practice
256:Royal Society Wolfson Research Merit Award
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67:about living persons that is unsourced or
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138:Learn how and when to remove this message
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417:, near Manchester, and then went to the
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1889:Fellows of the Royal Society of Biology
1869:Academics of the University of Aberdeen
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494:Speakman's group was the first to link
471:Speakman is well known for his work on
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702:(PhD thesis). University of Stirling.
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1909:Alumni of the University of Stirling
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1031:Speakman JR, et al. (2023).
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698:Speakman, Jonathan Roger (1984).
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1445: This article incorporates
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1127:10.1111/j.1365-2435.2012.02048.x
1111:10.1111/j.1365-2656.2010.01689.x
1008:International Journal of Obesity
943:International Journal of Obesity
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864:. London: Chapman & Hall.
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487:and random genetic drift: the
429:. He was subsequently awarded
394:energy expenditure and balance
1:
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541:publications can be found at
1879:Fellows of the Royal Society
1422:National Academy of Sciences
1203:publications indexed by the
799:. University of Aberdeen, UK
777:. University of Aberdeen, UK
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797:"Energetics Research Group"
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483:arose via the release from
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1051:10.1038/s42255-023-00782-2
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1143:10.1111/1365-2656.12086
911:10.1126/science.abe5017
860:Speakman, J.R. (1997).
477:thrifty gene hypothesis
1396:University of Aberdeen
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489:drifty gene hypothesis
439:University of Stirling
435:University of Aberdeen
419:University of Stirling
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386:University of Aberdeen
310:University of Aberdeen
238:University of Stirling
59:Please help by adding
1392:"Awards & Prizes"
1290:Aberdeen.academia.edu
1190:Europe PubMed Central
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753:companieshouse.gov.uk
749:"John Roger SPEAKMAN"
547:Europe PubMed Central
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955:10.1038/ijo.2008.161
415:Leigh Grammar School
390:doubly labeled water
365:/energetics-research
228:Leigh Grammar School
65:Contentious material
1670:Lalita Ramakrishnan
1630:Dominic Kwiatkowski
1418:"2020 NAS Election"
1343:. 16 September 2014
903:2021Sci...373..808P
449:Career and research
378:John Roger Speakman
206:John Roger Speakman
1864:British biologists
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1660:Tracy Palmer
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1555:Philip Dawid
1535:Frank Caruso
1515:Polly Arnold
1439:
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1421:
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559:academia.edu
555:ResearchGate
536:
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427:wading birds
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128:October 2022
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1854:1958 births
1750:Daniel Wise
1620:Andrew King
1580:Roger Goody
1560:Peter Dayan
1341:Iab.uaf.edu
1014:, 1607-10,
537:Speakman's
500:polymorphic
214:Nationality
1848:Categories
1833:Adi Shamir
1675:Nancy Reid
1600:Judy Hirst
1575:Wenfei Fan
1370:bic.cas.cn
1225:abdn.ac.uk
1089:, 1961-5.
949:, 1611-7.
827:. London:
755:. London:
651:References
481:phenotypes
282:Energetics
98:newspapers
1705:John Smol
1645:Elon Musk
1451:CC BY 4.0
716:499851672
708:1893/2570
485:predation
401:Education
382:biologist
367:/speakman
297:Lactation
224:Education
50:citations
1764:Honorary
1494:elected
1453:license.
1427:28 April
1402:13 March
1266:cite web
1069:37100994
1060:10445668
990:, 5-12.
929:34385400
803:13 March
781:13 March
504:FTO gene
76:libelous
1781:Foreign
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1496:in 2018
1490:of the
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920:8370708
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891:Science
844:at the
473:obesity
459:isotope
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352:Website
287:Obesity
218:British
177:FMedSci
112:scholar
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332:(1984)
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270:Fields
258:(2016)
252:Awards
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840:.” --
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1429:2020
1404:2011
1398:, UK
1377:2017
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1297:2018
1272:link
1258:2018
1232:2018
1171:ISBN
1155:ISBN
1065:PMID
925:PMID
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805:2011
783:2011
712:OCLC
202:Born
181:FRSS
173:FRSA
169:FRSB
165:FRSE
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