Sea Turtle Population Matrix Model Guest Lecture

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Sea Turtle Population Matrix Model Guest Lecture

  1. 1. Discussion of sea turtle pop. matrix model paper<br />Bio 41E (Karnovsky) guest lecture,<br />Jason Price, PhD<br />2011-03-23<br />
  2. 2. 3 part approach: <br />Overview/Main Results & Conclusions<br />Key details (Figures & Tables)<br />Big picture: Contribution to the field<br />Crouse et al. 1987<br />
  3. 3. Part 1 Breakout: Paper overview<br />What were the authors’ goals?<br />What methods did they use?<br />What were the main results?<br />What did they conclude?<br />Crouse et al. 1987<br />
  4. 4. Crouse et al. 1987<br />Part 2Key Details: Parameters pg 1415<br />when λm= er= 1, r = 0 = stable pop. Size<br />ε= elasticity = Proportional senistivity = differentialΔλfor same amnt of Δ in parameter <br />Parameters <br />Fi = reproductive output (think Fecundity)<br />Gi = prop. of indiv Growing to next stage<br />Pi = prop. of indiv surviving within stage <br />(Di = prop of indiv. Not surviving) <br />pi = annual survival probablility<br />di = stage duration<br />
  5. 5. Crouse et al. 1987<br />Key Details: Stage Class Pop Matrix<br />Pg 1415<br />
  6. 6. Crouse et al. 1987<br />Fig 1<br />
  7. 7. How do they improve on Fig 1? <br />Crouse et al. 1987<br />
  8. 8. Crouse et al. 1987<br />Fig 3 Fi PiGi Proportional sensitivity<br />Within-stage <br />Survival <br />Fecundity<br />Between-stage<br /> survival<br />
  9. 9. How improve on Fig 3?<br />Crouse et al. 1987<br />
  10. 10. Crouse et al. 1987<br />Fig 4 pidiProportional sensitivity<br />To stage specific<br />survival probability<br />To changes in <br />stage duration<br />
  11. 11. What other key details did you notice?<br />Crouse et al. 1987<br />
  12. 12. Part 3 Big Picture<br />What did you learn (beyond main results)?<br />What is the value of using life tables? <br />Why were you assigned this paper? / What makes it exceptional?<br />What question would you ask Crouse if you had been present at her PhD defense? <br />Crouse et al. 1987<br />

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