There are Federal hatcheries at Swanton (for pike perch and yellow perch) and at Holden (for trout). [Please select]
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Several species prey upon the predaceous diving beetles _(Dytiscidae),_ which are a nuisance in fish hatcheries and which destroy many insects, the natural food of fishes. [Please select]
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State pheasant hatcheries have been established in Massachusetts, Connecticut, New York, New Jersey, Ohio, Illinois, Missouri, Iowa and California. [Please select]
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The hatching is done by custom hatcheries, the eggs coming from flocks of White Leghorns on farms that do not specialize in poultry but keep a flock of Leghorns under more favorable conditions than exist on the egg farms. [Please select]
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The arrangements used in these old hatcheries are crude, and the success of the operation depends upon exceptional skill and judgment on the part of the operator. [Please select]
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