Sterile Insect Release: Curacao Simulation Exercises



Exercises

General Instructions

  • Review the background for SIR

  • Download and print the PDF for the exercises

  • Click the Open Simulation button. The simulation settings open in a window.

    Scroll through the menus, noting the purpose of each parameter. Each parameter can be set individually, and the default values can be restored by clicking on the "Default Reset" button. The default parameters represent the assumptions of the example published by Knipling in 1979.

  • Click on the Run Simulation button at the bottom of the window to begin execution.

    A diagrammatic representation of the island of Curaçao, divided up into "cells," will appear. The blue cells represent sea, the green cells land, and the yellow cells areas infested with the target insect. The intensity of the yellow color is a function of the population density of fertile females. In this simulation, we divide the island into three concentric zones, Zone 1 being the innermost zone. The default places native insects only in the center zone.

  • Click on the Next Generation button in the lower right corner of the window to advance the simulation one generation at a time.

....proceed to EXERCISE 1

Introduction

The first practical application of sterile insect release (SIR) for the eradication of an insect pest was on the Caribbean island of Curaçao, in the Dutch Antilles, 60 kilometers off the north coast of Venezuela.
A USDA team in a large-scale field test in 1955 drove the screwworm, Cochliomyia hominivorax, a serious pest of livestock, to extinction in just 10 weeks.

 

This simulation is patterned after the simple mathematical model published by E. F. Knipling in 1955. The original version of the simulation was written by A. J. Sawyer (1987) to illustrate the effects of changes in the assumptions of the Knipling model.

The simulation was rewritten as a Microsoft Windows application by B. E. Ticknor and P. A. Arneson in 1990. It was modified as a web application in 2001 by J. M. Goldfarb.

 

 


Last updated: July 3, 2003
© Cornell University 2003