4.4 Article

Stochastic Dynamic Programming Illuminates the Link Between Environment, Physiology, and Evolution

Journal

BULLETIN OF MATHEMATICAL BIOLOGY
Volume 77, Issue 5, Pages 857-877

Publisher

SPRINGER
DOI: 10.1007/s11538-014-9973-3

Keywords

Stochastic dynamic programming; Parasitoids

Funding

  1. NSF [EF-0924195]
  2. USDA
  3. Cal-Fed Science Program
  4. NATO
  5. California Sea Grant
  6. US National Marine Fisheries Service
  7. Direct For Biological Sciences
  8. Emerging Frontiers [0924195] Funding Source: National Science Foundation

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I describe how stochastic dynamic programming (SDP), a method for stochastic optimization that evolved from the work of Hamilton and Jacobi on variational problems, allows us to connect the physiological state of organisms, the environment in which they live, and how evolution by natural selection acts on trade-offs that all organisms face. I first derive the two canonical equations of SDP. These are valuable because although they apply to no system in particular, they share commonalities with many systems (as do frictionless springs). After that, I show how we used SDP in insect behavioral ecology. I describe the puzzles that needed to be solved, the SDP equations we used to solve the puzzles, and the experiments that we used to test the predictions of the models. I then briefly describe two other applications of SDP in biology: first, understanding the developmental pathways followed by steelhead trout in California and second skipped spawning by Norwegian cod. In both cases, modeling and empirical work were closely connected. I close with lessons learned and advice for the young mathematical biologists.

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