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Proceedings of the Royal Society B: Biological Sciences logoLink to Proceedings of the Royal Society B: Biological Sciences
. 2002 Jan 7;269(1486):21–27. doi: 10.1098/rspb.2001.1848

Pheasant sexual ornaments reflect nutritional conditions during early growth.

Thomas Ohlsson 1, Henrik G Smith 1, Lars Råberg 1, Dennis Hasselquist 1
PMCID: PMC1690866  PMID: 11788032

Abstract

Differences in growth conditions during early life have been suggested to cause long-lasting effects on morphology and quality of adult birds. We experimentally investigated the effect of early growth conditions on the expression of sexual ornaments later in life in male ring-necked pheasants (Phasianus colchicus). We also investigated the effects on immune function, as it could be a functional link between early nutrition and ornament expression. We manipulated the dietary protein intake during the first eight weeks post hatching. Males receiving fodder with 27% protein during the first three weeks of life grew larger and more colourful wattles when sexually mature than males receiving a low-protein diet (20.5% protein). Spur length was unaffected by diet treatment. Manipulation of food protein levels during weeks 4-8 after hatching had no effect on the development of ornaments. The different protein treatments had no long-term effect on either humoral or cell-mediated immune responses. There was, however, a positive relationship between spur length and cell-mediated immune responsiveness. Our study shows that expression of a sexual ornament in adult pheasants reflects nutritional conditions early in life. Because the expression of secondary sexual ornaments is affected by conditions during early growth, by selecting more ornamented males, females would choose mates that are superior at handling early nutritional stress. If the susceptibility to early nutritional stress also has a hereditary basis, females may benefit by obtaining 'good genes'.

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Selected References

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  1. Cheng S., Lamont S. J. Genetic analysis of immunocompetence measures in a White Leghorn chicken line. Poult Sci. 1988 Jul;67(7):989–995. doi: 10.3382/ps.0670989. [DOI] [PubMed] [Google Scholar]
  2. David P., Bjorksten T., Fowler K., Pomiankowski A. Condition-dependent signalling of genetic variation in stalk-eyed flies. Nature. 2000 Jul 13;406(6792):186–188. doi: 10.1038/35018079. [DOI] [PubMed] [Google Scholar]
  3. Hamilton W. D., Zuk M. Heritable true fitness and bright birds: a role for parasites? Science. 1982 Oct 22;218(4570):384–387. doi: 10.1126/science.7123238. [DOI] [PubMed] [Google Scholar]
  4. Hill GE. Is There an Immunological Cost to Carotenoid-Based Ornamental Coloration? Am Nat. 1999 Nov;154(5):589–595. doi: 10.1086/303264. [DOI] [PubMed] [Google Scholar]
  5. Klasing K. C. Nutritional modulation of resistance to infectious diseases. Poult Sci. 1998 Aug;77(8):1119–1125. doi: 10.1093/ps/77.8.1119. [DOI] [PubMed] [Google Scholar]
  6. Lindström J. Early development and fitness in birds and mammals. Trends Ecol Evol. 1999 Sep;14(9):343–348. doi: 10.1016/s0169-5347(99)01639-0. [DOI] [PubMed] [Google Scholar]
  7. Nowicki S., Hasselquist D., Bensch S., Peters S. Nestling growth and song repertoire size in great reed warblers: evidence for song learning as an indicator mechanism in mate choice. Proc Biol Sci. 2000 Dec 7;267(1460):2419–2424. doi: 10.1098/rspb.2000.1300. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Ohlsson T., Smith H. G. Early nutrition causes persistent effects on pheasant morphology. Physiol Biochem Zool. 2001 Mar-Apr;74(2):212–218. doi: 10.1086/319657. [DOI] [PubMed] [Google Scholar]
  9. doi: 10.1098/rspb.1998.0400. [DOI] [PMC free article] [Google Scholar]
  10. Rupes I. Cytoskeletal similarities. Nature. 1990 May 10;345(6271):119–119. doi: 10.1038/345119b0. [DOI] [PubMed] [Google Scholar]
  11. Sklan D., Melamed D., Friedman A. The effect of varying levels of dietary vitamin A on immune response in the chick. Poult Sci. 1994 Jun;73(6):843–847. doi: 10.3382/ps.0730843. [DOI] [PubMed] [Google Scholar]
  12. Warner R. E., Darda D. M., Baker D. H. Effects of dietary protein level and environmental temperature stress on growth of young ring-necked pheasants. Poult Sci. 1982 Apr;61(4):673–676. doi: 10.3382/ps.0610673. [DOI] [PubMed] [Google Scholar]
  13. Wedekind C. Mate choice and maternal selection for specific parasite resistances before; during and after fertilization. Philos Trans R Soc Lond B Biol Sci. 1994 Nov 29;346(1317):303–311. doi: 10.1098/rstb.1994.0147. [DOI] [PubMed] [Google Scholar]
  14. Woodard A. E., Vohra P., Snyder R. L. Effect of protein levels in the diet on the growth of pheasants. Poult Sci. 1977 Sep;56(5):1492–1500. doi: 10.3382/ps.0561492. [DOI] [PubMed] [Google Scholar]
  15. von Schantz T., Bensch S., Grahn M., Hasselquist D., Wittzell H. Good genes, oxidative stress and condition-dependent sexual signals. Proc Biol Sci. 1999 Jan 7;266(1414):1–12. doi: 10.1098/rspb.1999.0597. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. von Schantz T., Göransson G., Andersson G., Fröberg I., Grahn M., Helgée A., Wittzell H. Female choice selects for a viability-based male trait in pheasants. Nature. 1989 Jan 12;337(6203):166–169. doi: 10.1038/337166a0. [DOI] [PubMed] [Google Scholar]
  17. von Schantz T., Wittzell H., Göransson G., Grahn M., Persson K. MHC genotype and male ornamentation: genetic evidence for the Hamilton-Zuk model. Proc Biol Sci. 1996 Mar 22;263(1368):265–271. doi: 10.1098/rspb.1996.0041. [DOI] [PubMed] [Google Scholar]

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