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Pacific Herring Statistical Area Centroid Positions
Statistical Area and Herring Section Boundary Maps   <<< Previous page

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     Centroid positions are center points used to plot herring spawn, catch or tag (mark-recapture) data summarized by 30 statistical areas (0 to 29) as indicated on boundary maps.   The size of circles shown at these 30 positions on time-series maps or tag recovery maps may depict summations of spawners (t) or catches (t), the number of tags recovered (n) or tag recovery precision.   Pacific herring fishery data was first delineated by statistical area (in entirety) in 1933.   These spatial units were originally designed primarily for Pacific salmon fisheries which developed initially in south coast areas (e.g. Fraser River).   Spatial analysts should be cognizant that statistical areas are significantly smaller and more numerous in the south coast of British Columbia than in the north coast.

Other spatial scales: stock assessment regions, herring sections and herring locations.