public void setupDialog()
{
// set useNet to default selection
useNet.Checked = true;
volumeToUse = "Net";
// then we need the unique species/product groups plus live/dead for the grid
rgList = bslyr.GetUniqueSpeciesGroups();
SpeciesGroups.DataSource = rgList;
// remove existing regressions in table
bslyr.DeleteRegressions();
} // end setupDialog
