Cumulative Herring Spawn Analysis

Select a map from the pull down menu... or see overview maps of cumulative spawn (all years).

Large and frequently utilized, spawning beds are indicated by asterisks (*).
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Cumulative spawn maps are based on annual, herring spawn survey measurements. Check out a recent, survey manual. Egg depositions are estimated for each kilometre of British Columbia coastline and are separately summed by kilometre over all survey years (from 1928 to the present year). Spawn habitat indices for all BC coastal kilometre segments are re-calculated annually and plotted on digital maps. See cumulative herring spawn tables for further details.

Proportionately sized, multi-colour circles, rank and classify each kilometre of herring spawning habitat and display on 101 section maps of British Columbia. Learn more about these maps.

legend herring photo