The Relationship of the Juvenile Herring Stocks in Barkley Sound to the Major Adult Herring Populations in British Columbia

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Abstract
During the summers of 1951–53, small body-cavity tags were inserted in 55,547 juvenile (1-year) herring on the lower west coast of Vancouver Island. Fifty of these tags were recoved from the catches of adult fish between 1953–54 and 1956–57. These recoveries indicated homing by sub-district (the region occupied by an adult population) to be 52% after two years at large, and 64% after three years. Comparable data for herring tagged as adults showed 82% and 81% homing respectively. The greater tendency for the immature fish to mix with other adult populations may result from the fact that these fish join adult schools when the latter are considerably dispersed and intermixed on the offshore feeding grounds. Thus, population studies linking the juvenile and adult stages may require the use of a larger basic unit of area than that encompassing the distribution of the adult population. The dimensions of this unit will depend on the local potential for intermixing of adult populations at the time of recruitment.

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