Old male sex: large ejaculate, many sperm, but few offspring

  title={Old male sex: large ejaculate, many sperm, but few offspring},
  author={Tobias Kehl and Micha{\"e}l Beaulieu and Alexander Kehl and Klaus Fischer},
  journal={Behavioral Ecology and Sociobiology},
Reproduction induces non-trivial costs, such that both males and females should choose their mates carefully and invest their resources prudently. Male performance and thus their investment into ejaculates are often predicted to decrease with age and mating frequency, which may in turn negatively affect female fitness and thus feedback on the attractiveness of old males. Such reproductive senescence may be mediated by changes in the males’ oxidative status. Here, we investigated the effects of… CONTINUE READING
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