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Pacific Herring Section Maps (Rectangle positions)
  Herring Section and Statistical Area Boundary Maps     <<< Previous page

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     Centroid positions were established for each map rectangle shown in the figure above.   Centroid positions are center points used to plot herring spawn, catch or tag (mark-recapture) data summarized by 101 herring sections - see boundary maps.   These positions were determined by the mean latitude and longitude kilometre coordinates of all recorded spawning events occurring within the geographical boundaries of each section.   Currently, there are a total of 147 herring sections in BC.   Only 101 of these sections, however, have a history of spawning - see time-series maps of herring spawn data aggregated by 101 sections.   The remaining geographical sections of BC consist mostly of offshore areas and undefined spawning or fishing locations bounded within statistical areas.   Herring catches have been recorded in 143 of the 147 herring sections and are summarized in statistical tables by catch season and gear type.   Fifteen of the most expansive herring sections in BC have been subdivided further to facilitate mapping geographical areas at similar scales (e.g. Spiller and Mathieson Channels: 078N & 078S).   Herring spawn and catch statistics displayed on this Web site (e.g. mean lat/long positions and weighted, mean spawning dates, etc.) were not aggregated by these additional subdivisions but continue to conform to the 147 herring sections recorded by Haist and Rosenfeld (1988) or Midgley (2003).   See Herring Spawning Areas of BC for details or references.

Other spatial scales: stock assessment regions, statistical areas & herring locations.