Disruptive selection for alternative life histories in salmon

  title={Disruptive selection for alternative life histories in salmon},
  author={M. Hubert Vaudry Rapporteur M. Jean - Philippe Vert R Gross},
Many salmon species include males which mature as much as 50% younger and as small as 30% of the adult body size of other males in the population1–8. In the semelparous Pacific salmon Oncorhynchus spp., these small males are known as ‘jacks’, and they compete with larger late-maturing ‘hooknose’ males for opportunity to spawn on the breeding grounds. The existence of jacks is problematical as it is believed that salmon populations should have a single optimal age or size at maturity9–11. I now… CONTINUE READING
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