Sperm quality, secondary sexual characters and parasitism in roach (Rutilus rutilus L.)

@inproceedings{Kortet2004SpermQS,
  title={Sperm quality, secondary sexual characters and parasitism in roach (Rutilus rutilus L.)},
  author={Raine Kortet and Anssi Vainikka and Markus J Rantala and Juuso Taskinen},
  year={2004}
}
According to sperm competition models, a male spawning in a disfavoured role should have spermatozoa with higher velocity but shorter longevity compared with a male spawning in a favoured role. Moreover, immunosuppressive androgens are needed to produce both secondary sexual characters and sperm cells. The ‘sperm protection’ hypothesis suggests that the immunosuppressive action of androgens has evolved to protect haploid spermatozoa, which are antigenic, from autoimmune attacks. Therefore, a… CONTINUE READING
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