Regression analyses of relationship between catch and spectral reflectivities of targets.

For each regression model, explanatory terms (mean reflectivities across colour bands for regressions 1 and 2 or at particular wavelengths for regressions 3 and 4) were removed from the maximal models in which all terms were included but not their interactions. Parameter estimates and SEs are for the minimally-adequate models which include significant terms only. The change in deviance (Δ deviance) due to removing a term from the maximal model is also expressed as a percentage of the deviance of the maximal model.