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 Article › Research › Not peer-reviewed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

  29. Published

    Does hyperthermia constrain flight duration in a short-distance migrant?

    Guillemette, M. & Portugal, S., 26 Sep 2016, In: Philosophical Transactions of the Royal Society of London B: Biological Sciences. 371, 1704, p. 1-8 8 p.

    Research output: Contribution to journalArticlepeer-review

  30. E-pub ahead of print

    Ecological drivers of eggshell wettability in birds

    Attard, M., Bowen, J., Corado, R., Hall, L., Dorey, R. & Portugal, S., 13 Oct 2021, (E-pub ahead of print) In: Journal of the Royal Society. Interface.

    Research output: Contribution to journalArticlepeer-review

  31. Published

    Eggshell permeability: A standard technique for determining interspecific rates of water vapor conductance

    Portugal, S., Maurer, G., Cassey, P. & Portugal, S., 1 Nov 2010, In: Physiological and Biochemical Zoology. 83, 6, p. 1023-1031 9 p.

    Research output: Contribution to journalArticlepeer-review

  32. Published

    Eggshell pigment composition covaries with phylogeny but not with life history or with nesting ecology traits of British passerines

    Brulez, K., Portugal, S. & Cassey, P., Mar 2016, In: Ecology and Evolution. 6, 6, p. 1637–1645 9 p.

    Research output: Contribution to journalArticlepeer-review

  33. Published

    Embryo movement is more frequent in avian brood parasites than birds with other reproductive strategies

    Mcclelland, S., Reynolds, M., Cordall, M., Hauber, M. E., Goymann, W., McClean, L., Hamama, S., Lund, J., Dixit, T., Louder, M., Safari, I., Honza, M., Spottiswoode, C. & Portugal, S., 27 Oct 2021, In: Proceedings of the Royal Society B: Biological sciences. 288, 1961

    Research output: Contribution to journalArticlepeer-review

  34. Published

    Emergence of splits and collective turns in pigeon flocks under predation

    Papadopoulou, M., Hildenbrandt, H., Sankey, D., Portugal, S. & Hemelrijk, C., Feb 2022, In: Royal Society Open Science. 9, 2, 211898.

    Research output: Contribution to journalArticlepeer-review

  35. E-pub ahead of print

    Externally attached biologgers cause compensatory body mass loss in birds

    Portugal, S. & White, C., 30 Oct 2021, (E-pub ahead of print) In: Methods in ecology and evolution.

    Research output: Contribution to journalArticlepeer-review

  36. Published

    Fine-scale changes in speed and altitude suggest protean movements in homing pigeon flights

    Garde, B., Wilson, R., Lempidakis, L., Börger, L., Portugal, S., Hedenström, A., Dell’Omo, G., Quetting, M., Wikelski, M. & Shepard, E., 19 May 2021, In: Royal Society Open Science. 8, 5

    Research output: Contribution to journalArticlepeer-review

  37. Published

    First light for avian embryos: eggshell thickness and pigmentation mediate variation in development and UV exposure in wild bird eggs

    Maurer, G., Portugal, S., Hauber, M. E., Mikšík, I., Russell, D. G. D. & Cassey, P., Feb 2015, In: Functional Ecology. 29, 2, p. 209-218 10 p.

    Research output: Contribution to journalArticlepeer-review

  38. Published

    Flight feather moult drives minimum daily heart rate in wild geese

    Portugal, S., White, C., Green, J. & Butler, P., Nov 2018, In: Biology Letters. 14, 11, p. 1-4 4 p.

    Research output: Contribution to journalArticlepeer-review

  39. E-pub ahead of print

    Geographical bias in physiological data limits predictions of global change impacts

    White, C., Marshall, D., Chown, S., Clusella-Trullas, S., Portugal, S., Franklin, C. & Seebacher, F., 19 Apr 2021, (E-pub ahead of print) In: Functional Ecology.

    Research output: Contribution to journalArticlepeer-review

  40. Forthcoming

    Global diversity and adaptations of avian eggshell thickness indices

    Attard, M. & Portugal, S., 5 Sep 2022, (Accepted/In press) In: Ibis.

    Research output: Contribution to journalArticlepeer-review

  41. Published

    Greater energy stores enable flightless moulting geese to increase resting behaviour

    Portugal, S. J., Green, J. A., Piersma, T., Eichhorn, G., Butler, P. J. & Portugal, S., 1 Oct 2011, In: Ibis. 153, 4, p. 868-874 7 p.

    Research output: Contribution to journalArticlepeer-review

  42. Published

    Homing pigeons (Columba livia) modulate wingbeat characteristics as a function of route familiarity

    Taylor, L., Portugal, S. & Biro, D., 2017, In: Journal of Experimental Biology. 220, 16, p. 2908-2915 8 p.

    Research output: Contribution to journalArticlepeer-review

  43. E-pub ahead of print

    How much calcium to shell out? Eggshell calcium carbonate content is greater in birds with thinner shells, larger clutches, and longer lifespans

    Mcclelland, S., Cassey, P., Maurer, G., Hauber, M. E. & Portugal, S., 29 Sep 2021, (E-pub ahead of print) In: Journal of the Royal Society. Interface. 18, 182

    Research output: Contribution to journalArticlepeer-review

  44. E-pub ahead of print

    Impacts of “supermoon” events on the physiology of a wild bird

    Portugal, S., White, C., Frappell, P., Green, J. & Butler, P., 25 Jun 2019, (E-pub ahead of print) In: Ecology and Evolution. 9, 14, p. 7974-7984 11 p.

    Research output: Contribution to journalArticlepeer-review

  45. Published

    Implantation reduces the negative effects of bio-logging devices on birds

    White, C. & Portugal, S., 4 Apr 2013, In: Journal of Experimental Biology.. 216, p. 537-542

    Research output: Contribution to journalArticlepeer-review

  46. Published

    Indications of phenotypic plasticity in moulting birds: Captive geese reveal adaptive changes in mineralisation of their long bones during wing moult

    Portugal, S. J., Butler, P. J., Green, J. A., Cassey, P. & Portugal, S., 1 Oct 2011, In: Journal of Ornithology . 152, 4, p. 1055-1061 7 p.

    Research output: Contribution to journalArticlepeer-review

  47. E-pub ahead of print

    Ineffectiveness of light emitting diodes as underwater deterrents for long-tailed ducks Clangula hyemalis

    Cantlay, J., Bond, A. L., Wells-Berlin, A. M., Crawford, R., Martin, G. R., Rouxel, Y., Peregoy, S., McGrew, K. A. & Portugal, S., 7 May 2020, (E-pub ahead of print) In: Global Ecology and Conservation. e01102.

    Research output: Contribution to journalArticlepeer-review

  48. Published

    It Takes Time to Be Cool: On the Relationship between Hyperthermia and Body Cooling in a Migrating Seaduck

    Guillemette, M., Polymeropoulos, E., Portugal, S. & Pelletier, D., 25 Jul 2017, In: Frontiers in Physiology. 8, p. 1-10 10 p., 532.

    Research output: Contribution to journalArticlepeer-review

  49. Published

    Life in a bubble: the role of the labyrinth organ in determining territory, mating and aggressive behaviours in Anabantoid fishes

    Tate, M., McGoran, R., White, C. & Portugal, S., Sep 2017, In: Journal of Fish Biology. 91, 3, p. 723-749 27 p.

    Research output: Contribution to journalArticlepeer-review

  50. Published

    Matching times of leading and following suggest cooperation through direct reciprocity during V-formation flight in ibis

    Voelkl, B., Portugal, S., Unsold, M., Usherwood, J., Wilson, A. & Fritz, J., 17 Feb 2015, In: Proceedings of the National Academy of Sciences of the United States of America. 112, 7, p. 2115–2120 6 p.

    Research output: Contribution to journalArticlepeer-review

  51. Published

    Miniaturisation of biologgers is not alleviating the 5% rule

    Portugal, S. & White, C., Jul 2018, In: Methods in ecology and evolution. 9, 7, p. 1662-1666 5 p.

    Research output: Contribution to journalArticlepeer-review

  52. Published

    Nesting behaviour influences species-specific gas exchange across avian eggshells

    Portugal, S., Maurer, G. & Cassey, P., 15 Jul 2014, In: Journal of Experimental Biology.. 217, 18, p. 3326-3332 6 p., 10.1242/jeb.103291.

    Research output: Contribution to journalArticlepeer-review

  53. E-pub ahead of print

    Overall dynamic body acceleration as an indicator of dominance in Homing Pigeons (Columba livia)

    Ricketts, R., Sankey, D., Tidswell, B., Brown, J., Deegan, J. & Portugal, S., 28 Sep 2021, (E-pub ahead of print) In: Ibis.

    Research output: Contribution to journalArticlepeer-review

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