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DURING THE PAST 13 YEARS the MinnesotaDepartment of Conservation has raised -Naileyed pike from fry to fingerling size in ponds. Two types of ponds have been used: (1) artificial ponds so constructed that they can be drained, and (2) shallow natural ponds from •;hich the fingerlings are harvested by seining. This report deals ;•ith fingerling yield and some aspects of mm•agement of artificial ponds for the years 1945 t.hrou•h 1951. The number of artificial ponds operated for the rearing-of walleye fingerlings in each year of this period was as follows: might enter with the water supply. Screens, filters, or both are used on the intake lines. In spite of these precautions, other fishes sometimes get through and have had, therefore, mn m•o•rn effect on the yield of some of the ponds. Artificial ponds are usually cropped several weeks before the final harvest. At the 17& OCTOBER 1952 T•,w. 2.--CroppLug and growth of walleyed pike in drainable constructed •onds (Ponds ranked acccrding to total yield--pounds per acre, as in table l)

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