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- W2019480937 abstract "Abstract Several acclimation periods and hormone treatments were tried to determine their effects on controlled spawning of 2-year-old Florida largemouth bass (Micropterus salmoides floridanus). During the first season, fish were acclimated to raceways for 0–8 weeks before spawning; males and females were separated during acclimation. There was an inverse relationship between the length of the acclimation period and latency of first spawn after the sexes were mixed. The longest acclimation periods resulted in the shortest latencies; however, once spawning began, the rate of spawning (interval between spawns) was similar across treatments. During the second season, unacclimated and 2-week-acclimated largemouth bass were injected with saline, human chorionic gonadotropin (HCG; 4,000 IU/kg body weight) or [D-ala6pro9-N-ethylamide]-luteinizing hormone releasing hormone (LHRH-A; 0.5 mg/kg body weight). Injections of HCG induced spawning quicker, and produced more spawns and fry, than injections of LHRH-A or saline. Acclimated largemouth bass produced more spawns than did unacclimated largemouth bass in all treatments. Acclimation periods may have allowed stress associated with common fish culture practices to diminish and may have provided time for synchrony to develop between male and female largemouth bass. In the last experiment, injections of HCG in females alone resulted in spawns within 48 h; however, spawns did not produce fry. This was attributed to a lack of synchrony with males, possibly resulting in overripeness of eggs. These results show that optimum spawning can be achieved when largemouth bass are allowed to acclimate to raceway conditions for 2 weeks. and that HCG treatment of both sexes is the preferred hormone treatment for induction of spawning." @default.
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- W2019480937 date "1993-01-01" @default.
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- W2019480937 title "Raceway Spawning of Florida Largemouth Bass: Effects of Acclimation Time and Hormone Treatment on Spawning Success" @default.
- W2019480937 doi "https://doi.org/10.1577/1548-8640(1993)055<0001:rsoflb>2.3.co;2" @default.
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