Supplement 3. Scripts and data for estimating quantile equivalence for Ambystoma tigrinum trends (Dixon and Pechmann 2005) with the quantreg package in R.

File List Ambystoma.tigrinum.csv<br> trends.rtf Description trends.rtf is a text file with commands for implementing the quantile regression analyses on <i>Ambystoma tigrinum</i> trends in the text file Ambystoma.tigrinum.csv using the quantreg package in R. Ambystoma.tigrinum.csv<br> Column 1: species - amphibian species,<br> Column 2: year - year of count,<br> Column 3: abundance - numbers per constant effort search,<br> Column 4: lagabundance - abundance lagged 1 year.<br> trends.rtf