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- W1973223275 abstract "Abstract Channel catfish Ictalurus punctatus were induced to spawn out of season by means of photothermal and hormonal manipulations in indoor water-recirculating systems. Groups of fish were maintained under the following temperature regimes: annual, cycles of 9 months in cool water (17 ± 2°C) followed by 3 months at spawning temperatures (25–28°C); compressed, 6 months in cool water, then 3 months at spawning temperatures; annual–compressed, 6 months at spawning temperatures, followed by alternating cycles of 6 months of cool temperatures and 3 months of spawning temperatures; and extended, 15 months at cool temperatures, then 3 months at spawning temperatures. At cool temperatures fish received light 8 h/d; at spawning temperatures they received light 14 h/d. Fish subjected to two successive compressed regimes consistently spawned at the outset and at two 8-month intervals thereafter. All fish in the other groups also spawned when water temperatures were increased to 25 ± 2°C. Injections of luteinizing hormonereleasing hormone analog and human chorionic gonadotropin were used with half of the pairings to achieve spawning success. Hormone-induced females laid fewer eggs than females that spawned naturally either in season or out of season. Out-of-season fry production was similar to fry production from in-season spawns when eggs were collected and hatched in hatching jars. We demonstrated that manipulation of ovulation and oocyte maturation can be achieved in channel catfish to potentially provide a stable, year-round supply of fingerlings." @default.
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- W1973223275 date "1996-10-01" @default.
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- W1973223275 title "Manipulation of Spawning Cycles of Channel Catfish in Indoor Water-Recirculating Systems" @default.
- W1973223275 doi "https://doi.org/10.1577/1548-8640(1996)058<0221:moscoc>2.3.co;2" @default.
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