Costs of reproduction can explain the correlated evolution of semelparity and egg size: theory and a test with salmon.

  title={Costs of reproduction can explain the correlated evolution of semelparity and egg size: theory and a test with salmon.},
  author={Holly K. Kindsvater and Douglas C. Braun and Sarah Perin Otto and John D. Reynolds},
  journal={Ecology letters},
  volume={19 6},
Species' life history traits, including maturation age, number of reproductive bouts, offspring size and number, reflect adaptations to diverse biotic and abiotic selection pressures. A striking example of divergent life histories is the evolution of either iteroparity (breeding multiple times) or semelparity (breed once and die). We analysed published data on salmonid fishes and found that semelparous species produce larger eggs, that egg size and number increase with salmonid body size among… 

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