World's Best Scientists 2026 revealed!

D-Index & Metrics

Ecology and Evolution

D-Index
93
Citations
43328
World Ranking
383
National Ranking
56

Overview

John R. Krebs is affiliated with the University of Oxford in the United Kingdom. Their research primarily focuses on the field of Medicine, with significant contributions across several subfields including Public Health, Environmental and Occupational Health, Physiology, Oncology, Pediatrics, Perinatology and Child Health, and Genetics.

The scientist's work covers a variety of topics, notably in Nutritional Studies and Diet, Diet and Metabolism Studies, Colorectal Cancer Screening and Detection, Nutrition and Health in Aging, Cancer Risks and Factors, Consumer Attitudes and Food Labeling, and Cancer Survivorship and Care.

Recent publications by John R. Krebs center predominantly on colorectal cancer prognosis and related lifestyle and dietary factors. These include:

  • Post-diagnosis physical activity and sedentary behaviour and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis, 2024, International Journal of Cancer
  • Dietary-Lifestyle Patterns and Colorectal Cancer Risk: Global Cancer Update Programme (CUP Global) Systematic Literature Review, 2025, American Journal of Clinical Nutrition
  • Post-diagnosis dietary factors, supplement use and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis, 2024, International Journal of Cancer
  • Post-diagnosis adiposity, physical activity, sedentary behaviour, dietary factors, supplement use and colorectal cancer prognosis: Global Cancer Update Programme (CUP Global) summary of evidence grading, 2024, International Journal of Cancer
  • Post-diagnosis adiposity and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis, 2024, International Journal of Cancer

John R. Krebs frequently collaborates with several coauthors. Notable frequent collaborators include:

  • Ellen Copson
  • Monica L. Baskin
  • Rajiv Chowdhury
  • L. Robert Hill
  • Jacob C. Seidell

The majority of publications are found in these journals:

  • International Journal of Cancer
  • American Journal of Clinical Nutrition
  • Journal of Environmental Management
  • Nature
  • Historical Records of Australian Science

Their research outputs highlight a strong engagement with cancer-related studies, nutritional epidemiology, and public health, particularly focusing on lifestyle factors affecting colorectal cancer prognosis. The combination of frequent collaborations and publication in high-impact journals indicates ongoing involvement in multidisciplinary scientific efforts within their areas of study.

Best Publications

  • An introduction to behavioural ecology

    J. R. Krebs;N. B. Davies

  • Behavioural Ecology : An Evolutionary Approach

    J. R. Krebs;N. B. Davies

  • Arms races between and within species.

    Richard Dawkins;John Richard Krebs

  • Animal signals: information or manipulation?

    R. Dawkins;J. R. Krebs

  • The second Silent Spring

    John R. Krebs;Jeremy D. Wilson;Richard B. Bradbury;Gavin M. Siriwardena

  • Territory and Breeding Density in the Great Tit, Parus Major L.

    John R. Krebs

  • Hippocampal specialization of food-storing birds

    J R Krebs;D F Sherry;S D Healy;V H Perry

  • Test of optimal sampling by foraging great tits

    John R. Krebs;Alejandro Kacelnik;Peter Taylor

  • Hunting by expectation or optimal foraging: A study of patch use by chickadees

    John R. Krebs;John C. Ryan;Eric L. Charnov

  • ON CLUTCH‐SIZE AND FITNESS

    Eric L. Charnov;John R. Krebs

  • Optimal prey selection in the great tit (Parus major)

    John R. Krebs;Jonathan T. Erichsen;Michael I. Webber;Eric L. Charnov

  • Colonial Nesting and Social Feeding as Strategies for Exploiting Food Resources in the Great Blue Heron (Ardea Herodias)

    John R. Krebs

  • Territorial defence in the great tit (Parus major): Do residents always win?

    John R. Krebs

  • FLOCKING AND FEEDING IN THE GREAT TIT PARUS MAJOR–AN EXPERIMENTAL STUDY

    John R. Krebs;Michael H. MacRoberts;J. M. Cullen

  • Song repertoires and territory defence in the great tit

    John Krebs;Ruth Ashcroft;Mike Webber

  • Perspectives in ornithology: Perspectives in optimal foraging

    John R. Krebs;David W. Stephens;William J. Sutherland;J. P. Myers

  • How marsh tits find their hoards: the roles of site preference and spatial memory

    Sara J. Shettleworth;John R. Krebs

  • Relations between Song Repertoire Size and the Volume of Brain Nuclei Related to Song: Comparative Evolutionary Analyses amongst Oscine Birds

    Timothy J. Devoogd;John Richard Krebs;Susan D. Healy;Andy Purvis

  • Geographical variation in the song of the great tit parus major in relation to ecological factors

    Malcolm L. Hunter;John R. Krebs

  • An introduction to behavioural ecology, 2nd ed.

    John R. Krebs;Nicholas B. Davies;Jan Parr

  • Memory for spatial and object-specific cues in food-storing and non-storing birds

    N. S. Clayton;J. R. Krebs

  • Book reviewDeception: Perspectives on Human and Nonhuman Deceit, Robert W. Mitchell, Nicholas S. Thompson (Eds.), State University of New York Press, New York (1986), p. xxix

    John R. Krebs

Frequent Co-Authors

Susan D. Healy
Susan D. Healy University of St Andrews
Mark J. Whittingham
Mark J. Whittingham Newcastle University
Alejandro Kacelnik
Alejandro Kacelnik University of Oxford
Jeremy D. Wilson
Jeremy D. Wilson Royal Society for the Protection of Birds
Peter K. McGregor
Peter K. McGregor Cornwall College
Jonathan T. Erichsen
Jonathan T. Erichsen Cardiff University
Sara J. Shettleworth
Sara J. Shettleworth University of Toronto
Richard B. Bradbury
Richard B. Bradbury University of Cambridge
Nicola S. Clayton
Nicola S. Clayton University of Cambridge
Daniel M. Weary
Daniel M. Weary University of British Columbia

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