Effectiveness of a Whitefish Hatchery

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Abstract
A long term expt. to test the effectiveness of the Alberta whitefish hatchery was begun in 1941 by planting "eyed" eggs in a series of lakes on alternate yrs. Subsequent year class strengths, detd. by samples from the commercial catch, were then compared. Evidence from the first 5 yrs. indicates that hatchery supported year classes are no stronger than those not so supported in a series of lakes 12 to 462 sq. miles in area. Preliminary observations on the efficiency of natural reproduction indicate that about 10% of the eggs survive to become fry. This is sufficient to produce roughly 100 times the number of fish which a lake can support. The introduction of additional stock from a hatchery is, therefore, unlikely to increase production.

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