Dr Steve Portugal

  1. Doctoral Thesis › Research
  2. Published
  3. Article › Research › Not peer-reviewed
  4. Published

    Mechanics of flight feathers: effects of captivity?

    Portugal, S., Nudds, R., Green, J., Alexander, R. M., Butler, P. & Ker, R., 2020, In: bioRxiv.

    Research output: Contribution to journalArticle

  5. Published

    Overall dynamic body acceleration as an indicator of dominance in homing pigeons

    Ricketts, R., Sankey, D., Tidswell, B., Brown, J., Deegan, J. & Portugal, S., 2020, In: bioRxiv.

    Research output: Contribution to journalArticle

  6. Submitted

    Pre-winter fattening and fat loss during wing moult: the annual cycle of fat deposition in captive barnacle geese (Branta leucopsis).

    Portugal, S., McGill, R., Green, J. & Butler, P., 2020, (Submitted) In: bioRxiv.

    Research output: Contribution to journalArticle

  7. Published

    The determinants of aggression in male Siamese fightingfish, Betta splendens

    McGoran, R., Papworth, S. & Portugal, S., 2020, In: bioRxiv.

    Research output: Contribution to journalArticle

  8. Article › Research › Peer-reviewed
  9. Published

    A comparison of indices and measured values of eggshell thickness of different shell regions using museum eggs of 230 European bird species

    Maurer, G., Portugal, S. J., Cassey, P. & Portugal, S., 1 Oct 2012, In: Ibis. 154, 4, p. 714-724 11 p.

    Research output: Contribution to journalArticlepeer-review

  10. Published

    A rare mineral, vaterite, acts as a shock absorber in the eggshell of a communally nesting bird

    Portugal, S., Bowen, J. & Riehl, C., 3 Jan 2018, In: Ibis. 160, 1, p. 173-178 6 p.

    Research output: Contribution to journalArticlepeer-review

  11. Published

    Absence of “selfish herd” dynamics in bird flocks under threat

    Sankey, D., Storms, R., Musters, R., Russell, T., Hemelrijk, C. & Portugal, S., 4 Jun 2021, In: Current Biology . 31, 14, p. 3192-3198 7 p.

    Research output: Contribution to journalArticlepeer-review

  12. Published

    Annual changes in body mass and resting metabolism in captive barnacle geese (Branta leucopsis): the importance of wing moult

    Portugal, S. J., Green, J. A. & Butler, P. J., 31 Mar 2007, In: Journal of Experimental Biology. 210, p. 1391-1397 7 p.

    Research output: Contribution to journalArticlepeer-review

  13. Published

    Artificial mass loading disrupts stable social order in pigeon dominance hierarchies

    Portugal, S., Usherwood, J., White, C., Sankey, D. & Wilson, A. M., 5 Aug 2020, In: Biology Letters. 16, 8, 6 p.

    Research output: Contribution to journalArticlepeer-review

  14. Published

    Associations Between Resting, Activity and Daily metabolic rate in Free-living Endotherms: No Universal Rule for Birds and Mammals

    Portugal, S., Green, J., Halsey, L. & Butler, P., 14 Apr 2016, In: Physiological and Biochemical Zoology. 89, 3

    Research output: Contribution to journalArticlepeer-review

  15. Published

    Avian eggshell pigments are not consistently correlated with colour measurements or egg constituents in two Turdus thrushes

    Cassey, P., Mikšík, I., Portugal, S. J., Maurer, G., Ewen, J. G., Zarate, E., Sewell, M. A., Karadas, F., Grim, T., Hauber, M. E. & Portugal, S., 1 Nov 2012, In: Journal of Avian Biology. 43, 6, p. 503-512 10 p.

    Research output: Contribution to journalArticlepeer-review

  16. Published

    Avian embryonic development does not change the stable isotope composition of the calcite eggshell

    Maurer, G., Portugal, S. J., Boomer, I. & Cassey, P., 24 Jan 2011, In: Reproduction, Fertility and Development. 23, 2, p. 339-345 7 p.

    Research output: Contribution to journalArticlepeer-review

  17. Published

    Balancing the competing requirements of air-breathing and display behaviour during male-male interactions in Siamese fighting fish Betta splendens

    Alton, L. A., Portugal, S. J., White, C. R. & Portugal, S., 1 Feb 2013, In: Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology. 164, 2, p. 363-367 5 p.

    Research output: Contribution to journalArticlepeer-review

  18. Published

    Behavioural compensation reduces energy expenditure during migration hyperphagia in a large bird

    Guillemette, M., Richman, S. E., Portugal, S. J., Butler, P. J. & Portugal, S., 1 Aug 2012, In: Functional Ecology. 26, 4, p. 876-883 8 p.

    Research output: Contribution to journalArticlepeer-review

  19. Published

    Bird flocks

    Portugal, S., 9 Mar 2020, In: Current Biology . 30, 5, p. 206-210 5 p.

    Research output: Contribution to journalArticlepeer-review

  20. Published

    Birds invest wingbeats to keep a steady head and reap the ultimate benefits of flying together

    Taylor, L., Taylor, G., Lambert, B., Walker, J., Biro, D. & Portugal, S., 18 Jun 2019, In: PLoS Biology. 17, 6, p. 1-20 20 p., e3000299.

    Research output: Contribution to journalArticlepeer-review

  21. Published

    Birds of a feather

    Portugal, S. & Jones, T., 1 Mar 2009, In: Planet Earth. SPRING, p. 24-25 2 p.

    Research output: Contribution to journalArticlepeer-review

  22. Published

    Boldness traits, not dominance, predicts exploratory flight range and homing behaviour in homing pigeons

    Portugal, S., Ricketts, R., Chappell, J., White, C., Shepard, E. & Biro, D., Aug 2017, In: Philosophical Transactions of the Royal Society of London B: Biological Sciences. 372, 1727, p. 1-10 10 p.

    Research output: Contribution to journalArticlepeer-review

  23. Published

    Bringing a Time–Depth Perspective to Collective Animal Behaviour

    Biro, D., Sasaki, T. & Portugal, S., Jul 2016, In: Trends in Ecology and Evolution. 31, 7, p. 550–562 13 p.

    Research output: Contribution to journalArticlepeer-review

  24. Published

    Can museum egg specimens be used for proteomic analyses?

    Portugal, S. J., Cooper, H. J., Zampronio, C. G., Wallace, L. L., Cassey, P. & Portugal, S., 14 Jul 2010, In: Proteome Science. 8, 40.

    Research output: Contribution to journalArticlepeer-review

  25. E-pub ahead of print

    Climate variability and parent nesting strategies influence gas exchange across avian eggshells

    Attard, M. & Portugal, S., 16 Jun 2021, (E-pub ahead of print) In: Proceedings of the Royal Society B: Biological sciences.

    Research output: Contribution to journalArticlepeer-review

  26. Published

    Convergent evolution of reduced eggshell conductance in avian brood parasites

    Mcclelland, S., Jamie, G., Waters, K., Caldas, L., Spottiswoode, C. & Portugal, S., Apr 2019, In: Philosophical Transactions of the Royal Society of London B: Biological Sciences. 374, 1769, p. 1-12 12 p.

    Research output: Contribution to journalArticlepeer-review

  27. Published

    Differences in foraging ecology determine variation in visual fields in ibises and spoonbills (Threskiornithidae)

    Martin, G. R., Portugal, S. J. & Portugal, S., 1 Oct 2011, In: Ibis. 153, 4, p. 662-671 10 p.

    Research output: Contribution to journalArticlepeer-review

  28. Published

    Do captive waterfowl alter their behaviour patterns during their flightless period of moult?

    Portugal, S. J., Isaac, R., Quinton, K. L., Reynolds, S. J. & Portugal, S., 1 Jan 2010, In: Journal of Ornithology . 151, 2, p. 443-448 6 p.

    Research output: Contribution to journalArticlepeer-review

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