Abstract
The yolk of bird eggs contains maternal carotenoids that may act as antioxidants thus influencing offspring performance and survival. However, to our knowledge, this hypothesis has not been subjected to experimental tests and the function of transmission of carotenoids to the egg is largely unknown. We directly manipulated the concentration of the main carotenoid (lutein) in the eggs of barn swallows (Hirundo rustica) and analysed the effect of experimental manipulation on growth of nestlings and two fundamental components of their acquired immunity. Nestlings hatched from lutein-inoculated eggs had larger T-cell-mediated immune response compared with those of two control groups. T-cell-mediated immune response predicted nestling survival until fledging. However, lutein inoculation did not affect antibody response to an immunogen, body mass, tarsus length or plumage development. Nestling body mass and plumage development declined with egg laying order, but the effects of lutein inoculation were independent of egg laying order for all traits. Our results show that maternal yolk carotenoids can have a major effect in promoting a fundamental component of immunity that predicts offspring survival and suggests that adaptive early maternal effects can be mediated by transmission of antioxidants to eggs.
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Selected References
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- Dietert R. R., Golemboski K. A., Austic R. E. Environment-immune interactions. Poult Sci. 1994 Jul;73(7):1062–1076. doi: 10.3382/ps.0731062. [DOI] [PubMed] [Google Scholar]
- Edge R., McGarvey D. J., Truscott T. G. The carotenoids as anti-oxidants--a review. J Photochem Photobiol B. 1997 Dec;41(3):189–200. doi: 10.1016/s1011-1344(97)00092-4. [DOI] [PubMed] [Google Scholar]
- Saino N., Ninni P., Calza S., Martinelli R., De Bernardi F., Møller A. P. Better red than dead: carotenoid-based mouth coloration reveals infection in barn swallow nestlings. Proc Biol Sci. 2000 Jan 7;267(1438):57–61. doi: 10.1098/rspb.2000.0966. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Saino Nicola, Bertacche Vittorio, Ferrari Raffaella Paola, Martinelli Roberta, Møller Anders Pape, Stradi Riccardo. Carotenoid concentration in barn swallow eggs is influenced by laying order, maternal infection and paternal ornamentation. Proc Biol Sci. 2002 Aug 22;269(1501):1729–1733. doi: 10.1098/rspb.2002.2088. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Saino Nicola, Ferrari Raffaella Paola, Martinelli Roberta, Romano Maria, Rubolini Diego, Møller Anders Pape. Early maternal effects mediated by immunity depend on sexual ornamentation of the male partner. Proc Biol Sci. 2002 May 22;269(1495):1005–1009. doi: 10.1098/rspb.2002.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tella José L., Scheuerlein Alex, Ricklefs Robert E. Is cell-mediated immunity related to the evolution of life-history strategies in birds? Proc Biol Sci. 2002 May 22;269(1495):1059–1066. doi: 10.1098/rspb.2001.1951. [DOI] [PMC free article] [PubMed] [Google Scholar]