Walleye Hatching, Rearing And Transporting Techniques As Practiced In Kentucky

This study revealed that walleye, Stizostedion vitreum vitreum (Mitchell), can be jar-hatched, stocked, and a portion raised to fingerling size, for an annual outlay of $1,000.00 or less. Early returns indicate that walleye can be inexpensively established by stocking fry in either old or new lakes. The method used was to stock the fish in intermittent rows from a boat. Both openwater stocking and shoreline stocking were practiced successfully. Two ponds were utilized for experimental walleye production in 1958. Walleye were produced at the rate of 21,255 fingerling walleye 1 1/2 to 2 inches in length per acre in one experimental pond and 10,333 in another pond, without re-sorting to feeding with minnows. This seemed to indicate that walleye lend themselves to pond culture as far south as Kentucky. The experimental evidence concurred with the findings of Dobie (1956) in Minnesota and indicated that production was augmented by the use of organic fertilizers. The writer used hay and soybean meal. It was felt that hay was especially beneficial by helping to prevent phytoplankton blooms. Both fry and fingerlings were hauled in station wagons in plastic bags placed in cardboard beer cases, a variation of the Ohio method. The fry were hauled at an average of 36,000 per bag, 12 to 20 bags per station wagon. Various containers were used to carry the bags, and beer cases were found to be particularly tough and re-usable. They could be stacked 2 or 3 high and provided excellent insulation. O-Tabs, made by Pemble Laboratories, were more successful than bottled oxygen for hauling fry. Buffers, such as dibasic sodium phosphate and sodium bicarbonate, were tried experimentally but were found to be unnecessary. Icing was also used experimentally and was successful but unnecessary. Preliminary evidence indicated that fingerling walleye 1 1/2 to 2 inches in length and weighing 728 per pound could probably be hauled at the rate of 7,000 to 9,000 per station wagon load. Buffers were needed for hauling fingerlings in plastic bags. Best results were obtained by using dibasic sodium phosphate, activated charcoal, and icing the bag.

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