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Evolutionary biology

Scramble for the eggs

Copulating cockerels can, it seems, tailor their ejaculate to several factors: the degree of male competition, whether they have mated with the female before, and the female's reproductive 'value'.

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  1. Parker, G. A. Biol. Rev. 45, 525–567 (1970).

    Article  Google Scholar 

  2. Birkhead, T. R. & Møller, A. P. Sperm Competition and Sexual Selection (Academic, London, 1998).

    Google Scholar 

  3. Gage, M. J. G. & Morrow, E. H. Curr. Biol. 13, 754–757 (2003).

    Article  CAS  Google Scholar 

  4. Pizzari, T., Cornwallis, C. K., Løvlie, H., Jakobsson, S. & Birkhead, T. R. Nature 426, 70–74 (2003).

    Article  ADS  CAS  Google Scholar 

  5. Setchell, B. P. in Reproduction in Mammals Vol. 1, Germ Cells and Fertilization (eds Austin, C. R. & Short, R. V.) 63–101 (Cambridge Univ. Press, 1982).

    Google Scholar 

  6. Olsson, M., Madsen, T. & Shine, R. Proc. R. Soc. Lond. B 264, 455–459 (1997).

    Article  ADS  Google Scholar 

  7. Parker, G. A., Ball, M. A., Stockley, P. & Gage, M. J. G. Proc. R. Soc. Lond. B 264, 1793–1802 (1997).

    Article  ADS  CAS  Google Scholar 

  8. Parker, G. A., Ball, M. A., Stockley, P. & Gage, M. J. G. Proc. R. Soc. Lond. B 263, 1291–1297 (1996).

    Article  ADS  Google Scholar 

  9. Gage, M. J. G. Anim. Behav. 42, 1036–1037 (1991).

    Article  Google Scholar 

  10. Wedell, N., Gage, M. J. G. & Parker, G. A. Trends Ecol. Evol. 17, 313–320 (2002).

    Article  Google Scholar 

  11. Martin, O. Y. & Hosken, D. J. Anim. Behav. 63, 541–546 (2002).

    Article  Google Scholar 

  12. Pilastro, A., Scaggiante, M. & Rasotto, M. B. Proc. Natl Acad. Sci. USA 99, 9913–9915 (2002).

    Article  ADS  CAS  Google Scholar 

  13. Wilson, J. R., Kuehn, R. E. & Beach, F. A. J. Comp. Physiol. Psychol. 56, 636–644 (1963).

    Article  CAS  Google Scholar 

  14. Dewsbury, D. A. Psychol. Bull. 89, 464–482 (1981).

    Article  Google Scholar 

  15. Pound, N. Proc. R. Soc. Lond. B 266, 1755–1758 (1999).

    Article  CAS  Google Scholar 

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Gage, M. Scramble for the eggs. Nature 426, 22–23 (2003).

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