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Credit: Saskia Keller, National Wildlife Health Center.

A graph showing general density-dependent and frequency-dependent relationships between host contact rates and population density

You think that this pathogen has density-dependent transmission, so you decide to cull snakes to reduce snake density and transmission. You doubt that you can reduce the population density below the invasion threshold (reducing R0 below 1), but you hope that some density reduction will appreciable slow disease spread, especially at the invasion front, where you focus your efforts. The humanpower required to find and catch snakes makes this an expensive and time-consuming intervention. However, it is slightly less intensive and expensive than specifically finding infected snakes, because you can deploy non-selective snake traps. After all your team's hard work, you estimate that you were able to cull 20% of all snakes in affected areas. In NetLogo, click the “cull-snakes” button a single time, which should cause many of the red dots to turn black. Now advance 4 weeks/ticks and subtract $50,000 from your budget. 

Fluid preserved snakes in containers at a museum

Your team did not cull any endangered or threatened species and the culling methods were as humane as possible. However, the general public and conservation practitioners are upset that healthy snakes were culled in an attempt to control this outbreak. They worry that there will not be enough healthy snakes left to allow the population to recover, and that snakes that had natural resistance to the fungus may have been removed from the population. Decrease your team's charisma by 3 points. You will not be able to do another general cull of Florida snakes without your team being fired. What do you want to do next?

Option 1: Do another intervention.

Time Cost: Depends on which intervention you select

Monetary Cost: Depends on which intervention you select

Charisma Effect: Unknown

Option 2:  Apply for more money for research or control efforts.

Time Cost: 4 Weeks/Ticks

Monetary Cost: $0

Charisma Effect: Unknown

Option 3: Do more research.

Time Cost: It depends on which research option you choose

Monetary Cost: It depends on which research option you choose

Charisma Effect: Unknown

Educational games increase student engagement and learning. This game was created by S. Hopkins, PhD and is free to adapt and use. The corresponding NetLogo model and student worksheet are available on QUBESHub at http://dx.doi.org/10.25334/1XBQ-M835

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