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Crappie (Pomoxis spp.) is a popular sport fish with food fish potential. Feeding behavioral patterns should be considered prior to nutrtitional studies. The objective of this study was to determine the best feeding time and duration for hybrid crappie raised in indoor recirculating aquaculture systems. Three feeding treatments with three replciates consisted of two 12 hour feeding periods initiated at 0800 (12h-amLD) and 1700 (12h-pmLD) and a 24 feeding period started at 0800 (24h-amLD). Treatments in experimental tanks were arranged in a random block design and stocked with 14 hybrid fingerlings fed for 12 weeks. Fingerling fish were spwaned in pongs using previously feed trained black crappe females (P. nigromaculatus) and white crappie males (P. annularis). Weight gain, feed conversion ratio (FCR), survival rate, consumption rate and proximate analysis of fish flesh and visceral were measured. Mean mass weight gains for 12h-amLD, 12h-pmLD, and 24-amLD were 153, 196, and 139g. There were no significant differences (p ≥ 0.05) among weight gains. Mean FCR were 1.69, 1.82, and 2.57 for 12h-amLD, 12h-pmLD, and 24-amLD, respectively. A significant diffference in FCR occured between 24h and the two 12 hour treaments. There were no significant differences in survival rate, feed consumption, or composition of fish flesh among treatments. The only significant difference in visceral was between 12h treatments for ash. This study indicated that feeding times or durations did not affect hybrid crappies body weight gain. However, there could be a FCR advantage with the 12 hour feeding schedules.
Aquaculture--Research, Crappie, Crappie--Growth, Crappie--Feeds and feeding, Crappie--Physiology
Aquaculture and Fisheries
Brandon, Wiles N.; Dudenhoeffer, Gregory A.; and Omara-Alwala, Thomas R., "Optimal Feeding Time and Duration of Hybrid Crappie Kept Indoors" (2016). Cooperative Extension Research Publications. 9.