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- W2014089172 abstract "The procedures and techniques involved in the artificial propagation of northern pike (Esox lucius) at the Valley City, North Dakota, National Fish Hatchery are discussed. Twenty million to 40 million northern pike eggs are taken from wild fish each spring. The eggs are incubated in Downing-type glass jars and the “swim-up” fry are stocked in hatchery ponds at the rate of 100,000 per acre. The use of filtered water for incubation purposes increased the percentage of hatch from 20 percent in 1958 to 78 percent in 1959. Hatchery ponds are filled with water from the Sheyenne River and fertilized 2 weeks prior to the introduction of free-swimming pike. The fry grow to a length of 2-2 1/2 inches over a period of 4-6 weeks in the hatchery ponds. Fingerlings are harvested near the end of their plankton-feeding stage to prevent serious losses from cannibalism. Pond yields vary from 0 to 90,000 fingerlings per acre with an average of 35,000 during the 1959 and 1960 production years." @default.
- W2014089172 created "2016-06-24" @default.
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- W2014089172 date "1961-07-01" @default.
- W2014089172 modified "2023-09-25" @default.
- W2014089172 title "Propagation of Northern Pike" @default.
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- W2014089172 doi "https://doi.org/10.1577/1548-8659(1961)90[298:ponp]2.0.co;2" @default.
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