Hypotheses for the Production of Excess Zygotes: Models of Bet-hedging and Selective Abortion.

@article{Kozlowski1989HypothesesFT,
  title={Hypotheses for the Production of Excess Zygotes: Models of Bet-hedging and Selective Abortion.},
  author={Jan Kozlowski and Stephen C Stearns},
  journal={Evolution; international journal of organic evolution},
  year={1989},
  volume={43 7},
  pages={1369-1377}
}
Two hypotheses can explain the overproduction of zygotes. Bet-hedging assumes that optimal brood size varies unpredictably among breeding attempts. Excess zygotes are produced so that the number of independent offspring can be flexibly adjusted downward to the optimum number for that attempt. Selective abortion suggests that parents overproduce zygotes, identify those with the highest fitness expectations, then kill or abandon those with lower fitness in order to concentrate investment in those… CONTINUE READING

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