A hatchery is a man-made farm for fish, used to cultivate and breed a large number of fish in a enclosed environment regulary as oppose to going out and finding the fish naturally. It is usual manual labour; a hatchery worker will take a female salmon, release her eggs, and then externally add the male salmons sperm, mix them and allow them to fertilize,and incubate undisturbed, where there is no risk of disease, or being eaten, they can immediately dispose of any un fertilized eggs, and in a matter of weeks, and out of season, making salmon available for sale, in greater numbers, available any time.
Reckless overfishing threatened to exhaust the supply and to imperil the industry, until the state regulated it by law and provided for it by hatcheries.
The state through its department of fisheries operates at the annual expense of $50,000 ten salmonhatcheries, from which nearly 70,000,000 young salmon are liberated annually.
Thus the Columbia River is made to produce year after year practically the same supply of salmon.
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