A model for optimal offspring size in fish, including live-bearing and parental effects.

  title={A model for optimal offspring size in fish, including live-bearing and parental effects.},
  author={Christian Helms J\orgensen and Sonya K Auer and David N. Reznick},
  journal={The American naturalist},
  volume={177 5},
Since Smith and Fretwell's seminal article in 1974 on the optimal offspring size, most theory has assumed a trade-off between offspring number and offspring fitness, where larger offspring have better survival or fitness, but with diminishing returns. In this article, we use two ubiquitous biological mechanisms to derive the shape of this trade-off: the offspring's growth rate combined with its size-dependent mortality (predation). For a large parameter region, we obtain the same sigmoid… CONTINUE READING
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