Dr Steve Portugal

  1. Article › Research › Peer-reviewed
  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

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