Abstract
Abstract Log-linear models are proposed for the problem of simultaneously analyzing relative abundance indices available from different survey techniques over different areas and years. I show why analysis on the untransformed (original) scale is inappropriate, and why analysis on the logarithmic scale allows for a generally consistent theory. Models for estimating both annual abundance indices (two-way analysis of variance), and trends in annual abundance (analysis of covariance) are considered. The methods are illustrated by analyzing data from the Japanese commercial longline fishery for sablefish Anoplopoma fimbria in the gulf of Alaska.
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