for the other groups of species are always less than one-sixth oftotal catch volume.Nevertheless, a more detailed study of catch structure finds adifference between the two strata: the first two groups of species(small pelagics plus trash fish) total just 74% of catches by WA-MPAhouseholds compared with 89% among REM-MPA households. Thebiological spread of the fish catch is therefore much broader amongWA-MPA households.