Atlantic Fisheries Research Document 1996/121
Herrring spawn volume and progenitor biomass at Fisherman's bank, Prince Edward Island, in 1995
By D.K. Cairns; C. Leblanc; C. MacDougall
Abstract
Thicknesses of herring egg beds deposited at Fisherman's Bank in eastern Northumberland Strait were measured by underwater video and egg volumes were estimated by geostatistic analysis. In 1995, herring deposited an estimated 1,262 m³ of spawn on Fisherman's Bank, the smallest deposition in the time series (1985-1987, 1989-1995). Progenitor biomass responsible for this spawning was estimated as 7,514 tons. The decreased egg deposition does not necessarily mean a population crash because fish may have shifted spawning to the nearby Ridge or elsewhere.
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