#### Loggerhead PVA base model

##### Richard Murphy

Group exercise: loggerhead managementThis will allow Loggerhead turtles to persist for another 1000 years.

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Based on Crowder et al. 1994

Group exercise: loggerhead managementThis will allow Loggerhead turtles to persist for another 1000 years.

Group exercise: loggerhead managementThis will allow Loggerhead turtles to persist for another 1000 years.

- 1 year 3 months ago

Based on: https://www.nps.gov/yell/learn/upload/YellowstoneScience-BearIssue.pdf

PVA Practice

What is the approximate**carrying capacity** (K) of the Yellowstone grizzly population?

It looks like around 140 Bears (Total Abundance over Time for 1000 years).

PVA Practice

What is the approximate

It looks like around 140 Bears (Total Abundance over Time for 1000 years).

- 1 year 3 months ago

Based on: https://www.nps.gov/yell/learn/upload/YellowstoneScience-BearIssue.pdf

(PVA Lecture 2)

(PVA Lecture 2)

- 1 year 3 months ago

Based on: https://www.nps.gov/yell/learn/upload/YellowstoneScience-BearIssue.pdf

PVA review.

PVA review.

- 1 year 3 months ago

Basic exponential growth model with environmental stochasticity

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Basic exponential growth model with demographic stochasticity

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Basic exponential growth model

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Basic population model (linear)

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Predator-Prey

- 2 years 2 months ago

2f. [thought question] Is it possible for r maxrmax to be positive and yet for the total regional abundance to exhibit a persistent declining trend? Explain your reasoning, using at least one biologically realistic example.

- 2 years 2 months ago

Just as we can use metapopulation models to study the probability of **regional extinction**, we can also study **regional abundance** and regional abundance trends.

- 2 years 2 months ago

1j. Change your InsightMaker model to reflect the rescue effect AND internal colonization. Set the parameter to 0.1. Set the parameter to 0.25. Provide a link to your InsightMaker model as part of your lab write-up.

- 2 years 3 months ago

1i. Compare your InsightMaker results (provide a plot) with the results from applying Equation 4.8 from Gotelli. Show your work. Do the two answers match?

- 2 years 3 months ago

We will have a chance to use a metapopulation model in lab.

- 2 years 3 months ago

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This PVA will show the probability of extinction of the Swan Valley and Flathead Populations over time.

- 2 years 3 months ago

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Deterministic threats.

- 2 years 3 months ago

Translated loosely from NetLogo code developed by Dr. Elizabeth Hunter for a class on individual-based modeling.

Notes: init pop should be 50 sheep 5 wolves

kill rate should be 0.1

sheep birth should be 3.

wolf birth should be 1

wolf starvation should be self.remove()

Notes: init pop should be 50 sheep 5 wolves

kill rate should be 0.1

sheep birth should be 3.

wolf birth should be 1

wolf starvation should be self.remove()

- 2 years 3 months ago

demographic stochasticity

- 2 years 3 months ago

3b. Is the current population **viable**, under the criteria listed above? That is, is there a less than 5% risk of extinction over a 50-year time frame? **Hint**: use the *Sensitivity Testing* tool to run 500 replicates. Visualize the 95% quantile.

- 2 years 4 months ago

Environmental Stochasticity

- 2 years 4 months ago

- 2 years 4 months ago