Effects of Surface Water Spray, Diet, and Phase Feeding on Swim Bladder Inflation, Survival, and Cost of Production of Intensively Reared Larval Walleyes
- 1 October 1993
- journal article
- Published by Oxford University Press (OUP) in The Progressive Fish-Culturist
- Vol. 55 (4) , 224-228
- https://doi.org/10.1577/1548-8640(1993)055<0224:eoswsd>2.3.co;2
Abstract
Three experiments were conducted to determine the effects of a surface water spray and diet on survival and swim bladder inflation of intensively reared larval walleyes. Survival and swim bladder inflation were determined at 30 d posthatch. In each experiment, 275-L cylindrical tanks were stocked with 20 fry/L. In experiment 1, a spray of water was applied to the surface of three tanks, and three additional tanks received no surface spray. BioKyowa FFK-B diet was fed to fish in all tanks. Survival of fish with the spray (11.8%) and without the spray (9.1%) was not significantly different, but the incidence of swim bladder inflation was higher with (98.4%) than without the spray (51.7%). In experiment 2, larval walleyes were fed one of three commercially available larval feeds—FFK-B, San Francisco Bay Brand EPAC, and Zeigler Larval AP200—and all tanks received a surface spray. Only the fish fed FFK-B had reasonable 30-d survival (33.1%) and swim bladder inflation rates (95.6%). In experiment 3, ph...Keywords
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