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Journal of Ornithology

, Volume 152, Issue 1, pp 209–212 | Cite as

Evaluation of a glossmeter for studying the surface appearance of avian eggs

  • Golo Maurer
  • Phillip Cassey
Technical Notes

Abstract

Gloss is a striking characteristic of avian eggshells that may affect both egg recognition and clutch predation. Previously, gloss has proved difficult to quantify objectively. Newly developed handheld glossmeters seem to offer a solution. We evaluated the use of a handheld glossmeter for a range of different eggshell surfaces, shapes and sizes. In all cases, their measurements were strongly affected by egg size and seem currently suitable only for very large eggs; the size of Rhea sp. eggs or larger. A glossmeter may, however, still prove useful to quantify other structures in comparative ornithology, with flat surfaces such as feathers or nest material.

Keywords

Eggshell Structure Repeatability Tinamou Feather 

Zusammenfassung

Glanz ist eine markante Eigenschaft der Eierschalen der Vögel, die sowohl Ei-Erkennung als auch Gelegeprädation beeinflussen kann. Bisher hat sich Glanz meist als schwer quantifizierbar erwiesen. Neu entwickelte, tragbare Glanzmesser scheinen eine Lösung für diese Problem zu bieten. Wir haben den Gebrauch von Glanzmesser für ein weites Spektrum von Eierschalen verschiedener Oberflächen und Größen evaluiert. Für alle Eier war die Messung stark von der Größe abhängig und Glanzmesser scheinen derzeit nur für sehr große Eier, vom Rhea sp. Ei aufwärts, anwendbar. Glanzmesser könnten jedoch bei der Quantifizierung von Glanz flacher Objekte, wie Federn oder Nestmaterial, nützliche Anwendung in der vergleichenden Ornithologie finden.

Notes

Acknowledgments

We are very grateful to John Godrich Ltd. and the Zehntner GmbH for kindly loaning us a ZGM 1120.268 to conduct the study and for their advice. We also thank the Natural History Museum in Tring for providing the egg samples from their destructive collection. R Boulton, S Coward, T Harrison, J Myatt and S J Portugal kindly gloss-scored the eggs. The work was funded by a HFSP young investigators grant and a Leverhulme Trust project grant to P.C.

References

  1. Andersson S (1996) Bright ultraviolet colouration in the Asian whistling-thrushes (Myiophonus spp.). Proc Biol Sci 263:843–848CrossRefGoogle Scholar
  2. Bakken GS, Vanderbilt VC, Buttemer WA, Dawson WR (1978) Avian eggs—thermoregulatory value of very high near-infrared reflectance. Science 200:321–323CrossRefPubMedGoogle Scholar
  3. Delhey K, Peters A, Kempenaers B (2007) Cosmetic coloration in birds: occurrence, function, and evolution. Am Nat 169:S145–S158CrossRefPubMedGoogle Scholar
  4. Gosler AG, Higham J, Reynolds SJ (2005) Why are birds’ eggs speckled? Ecol Lett 8:1105–1113CrossRefGoogle Scholar
  5. Green R, Scharlemann JPW (2003) Egg and skin collections as a resource for long-term ecological studies. Bull Br Ornithol Club 123A:165–176Google Scholar
  6. Handford P, Mares MA (1985) The mating systems of ratites and tinamous: an evolutionary perspective. Biol J Linn Soc 25:77–104CrossRefGoogle Scholar
  7. Hunter RS, Richard WH (1987) The measurement of appearance, 2nd edn. Wiley, New YorkGoogle Scholar
  8. Lancaster DA (1964) Life history of the boucard tinamou in British Honduras part II: breeding biology. Condor 66:253–276CrossRefGoogle Scholar
  9. Lessells CM, Boag PT (1987) Unrepeatable repeatabilities: a common mistake. Auk 104:116–121Google Scholar
  10. Mänd R, Nigul A, Sein E (1986) Oomorphology—a new method. Auk 103:613–617Google Scholar
  11. Marshall AJ (2009) Leaf-display and the sexual cycle in the tooth-billed bowerbird (Scenopoeetes dentirostris, Ramsay). Proc Zool Soc Lond 120:749–759CrossRefGoogle Scholar
  12. Mizrach A, Lu R, Rubino M (2009) Gloss evaluation of curved-surface fruits and vegetables. Food Bioproc Technol 2:300–307CrossRefGoogle Scholar
  13. Moreno J, Osorno JL (2003) Avian egg colour and sexual selection: does eggshell pigmentation reflect female condition and genetic quality? Ecol Lett 6:803–806CrossRefGoogle Scholar
  14. Pezzo F, Gosler AG (2005) Evidence of prenuptial moult in the little bittern Ixobrychus minutus. Ringing Migr 22:129–132Google Scholar
  15. Schönwetter M (1960–1992) Handbuch der Oologie. Akademie, BerlinGoogle Scholar
  16. Shawkey MD, Estes AM, Siefferman LM, Hill GE (2003) Nanostructure predicts intraspecific variation in ultraviolet-blue plumage colours. Proc R Soc Lond B 270:1455–1460CrossRefGoogle Scholar
  17. Spottiswoode CN, Colebrook-Robjent JFR (2007) Egg puncturing by the brood parasitic greater honeyguide and potential host counter adaptations. Behav Ecol 18:792–799CrossRefGoogle Scholar
  18. Toomey M, Butler M, Meadows M, Taylor L, Fokidis H, McGraw K (2010) A novel method for quantifying the glossiness of animals. Behav Ecol Sociobiol 64:1047–1055CrossRefGoogle Scholar
  19. Underwood TJ, Sealy SG (2002) Adaptive significance of egg colouration. In: Deeming DC (ed) Avian incubation: behaviour, environment and evolution. Oxford University Press, Oxford, pp 280–298Google Scholar
  20. Wilson N, Preston EJ, Preston FW (1958) The gloss of eggs. Auk 75:456–464Google Scholar

Copyright information

© Dt. Ornithologen-Gesellschaft e.V. 2010

Authors and Affiliations

  1. 1.Centre for Ornithology, School of BiosciencesBirmingham UniversityBirminghamUK
  2. 2.School of Earth and Environmental ScienceUniversity of AdelaideAdelaideAustralia

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