Dr Steve Portugal

  1. 2006
  2. Published

    Respirometry: Anhydrous drierite equilibrates with carbon dioxide and increases washout times

    White, C. R., Portugal, S. J., Martin, G. R., Butler, P. J. & Portugal, S., 1 Sep 2006, In: Physiological and Biochemical Zoology. 79, 5, p. 977-980 4 p.

    Research output: Contribution to journalArticlepeer-review

  3. 2007
  4. 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

  5. 2008
  6. Published
  7. 2009
  8. 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

  9. Published

    Predicting the rate of oxygen consumption from heart rate in barnacle geese: effects of captivity and annual changes in body condition.

    Portugal, S., 9 Apr 2009, In: Journal of Experimental Biology.. 212, p. 2941-2948 doi:10.1242/jeb.034546.

    Research output: Contribution to journalArticlepeer-review

  10. Published

    Recording raptor behavior on the wing via accelerometry

    Halsey, L. G., Portugal, S. J., Smith, J. A., Murn, C. P., Wilson, R. P. & Portugal, S., 1 Jun 2009, In: Journal of Ornithology . 80, 2, p. 171-177 7 p.

    Research output: Contribution to journalArticlepeer-review

  11. Published

    Testing the use/disuse hypothesis: Pectoral and leg muscle changes in captive barnacle geese Branta leucopsis during wing moult

    Portugal, S. J., Thorpe, S. K. S., Green, J. A., Myatt, J. P., Butler, P. J. & Portugal, S., 1 Aug 2009, In: Journal of Experimental Biology. 212, 15, p. 2403-2410 8 p.

    Research output: Contribution to journalArticlepeer-review

  12. 2010
  13. 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

  14. 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

  15. Published

    Variability in avian eggshell colour: A comparative study of museum eggshells

    Cassey, P., Portugal, S. J., Maurer, G., Ewen, J. G., Boulton, R. L., Hauber, M. E., Blackburn, T. M. & Portugal, S., 15 Oct 2010, In: PLoS ONE. 5, 8, e12054.

    Research output: Contribution to journalArticlepeer-review

  16. 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

  17. 2011
  18. 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

  19. Published

    The use of body mass loss to estimate metabolic rate in birds

    Portugal, S. J., Guillemette, M. & Portugal, S., 1 Mar 2011, In: Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology. 158, 3, p. 329-336 8 p.

    Research output: Contribution to journalArticlepeer-review

  20. Published

    Vigilance patterns of wintering Eurasian Wigeon: Female benefits from male low-cost behaviour

    Portugal, S. J., Guillemain, M. & Portugal, S., 1 Jul 2011, In: Journal of Ornithology . 152, 3, p. 661-668 8 p.

    Research output: Contribution to journalArticlepeer-review

  21. 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

  22. 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

  23. 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

  24. Published

    Review: An embryo's eye view of avian eggshell pigmentation

    Maurer, G., Portugal, S. J., Cassey, P. & Portugal, S., 1 Nov 2011, In: Journal of Avian Biology. 42, 6, p. 494-504 11 p.

    Research output: Contribution to journalArticlepeer-review

  25. Published

    Speckles of cryptic black-headed gull eggs show no mechanical or conductance structural function

    Maurer, G., Portugal, S. J., Mikšík, I. & Cassey, P., 1 Nov 2011, In: Journal of Zoology . 285, 3, p. 194-204 11 p.

    Research output: Contribution to journalArticlepeer-review

  26. 2012
  27. Published

    Wild geese do not increase flight behaviour prior to migration

    Portugal, S. J., Green, J. A., White, C. R., Guillemette, M., Butler, P. J. & Portugal, S., 23 Jun 2012, In: Biology Letters. 8, 3, p. 469-72 4 p.

    Research output: Contribution to journalArticlepeer-review

  28. Published

    Visual fields, foraging and collision vulnerability in Gyps vultures

    Martin, G. R., Portugal, S. J., Murn, C. P. & Portugal, S., 1 Jul 2012, In: Ibis. 154, 3, p. 626-631 6 p.

    Research output: Contribution to journalArticlepeer-review

  29. Published

    Why are birds' eggs colourful? Eggshell pigments co-vary with life-history and nesting ecology among British breeding non-passerine birds

    Cassey, P., Thomas, G. H., Portugal, S. J., Maurer, G., Hauber, M. E., Grim, T., Lovell, P. G., Mikšík, I. & Portugal, S., 1 Jul 2012, In: Biological Journal of the Linnean Society. 106, 3, p. 657-672 16 p.

    Research output: Contribution to journalArticlepeer-review

  30. 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

  31. 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

  32. 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

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