Stock Dynamics
The stock recruitment relationship is that used in ICES (2000, p. 46) for medium term predictions. Season-1 recruits at age 0 into the fishery in year y in millions, , is an Occam-type function of spawning stock biomass in year y-1,  . Below the threshold of 2,348 thousand tonnes, recruits are a positive linear function of , and above the threshold recruitment is constant at 4,252 million, so that: 
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