WLF 448: Fish & Wildlife Population Ecology

Fall 2004

Lab 5 Help/Hints: Distance sampling

 

1. You have data for 2 treatments and a control.  So you should have 3 stratum with 4 line transects in each and each transect is 4 km in length. 

2. If you are having errors while running an analysis (convergence error), try deleting the "uniform" key function and re-running the analysis.  It can give you troubles at times.

3. In the results section, the table should include the key function and series expansion (the model it fits), the density estimate, the standard error of the density estimate and the 95% CI of the density estimate.

4. Your results table should resemble the one below.

Method / Strata Key Function/ Series Expansion Density Density 95% CI f(0) f(0) 95% CI ESW ESW 95% CI
Line transect/Control              
Line transect/Fertilized              
Line transect/Mowed              
Line transect/Total              

Revised: 28 September 2004