科研之友
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摘要
Maintenance feeding (MF) followed by higher submaximum feeding was evaluated to reduce waste feed, fecal solids, and feed conversion ratios (FCRs) in aquaculture. Individually housed juvenile hybrid bluegills constituted a control and two treatments. Controls were fed daily at maximum consumption indicated by a lead control group. In feeding cycle 1 (FC1), treatments (T1 and T2) received 14 d of MF followed by higher submaximum feeding for 28 d at 75% (SM75) and 100% (SM100) of control ration. FC2 followed with 7 d of MF in T1 and T2, followed by 28 d of SM75 and SM100, respectively. Over the 77-d experiment, controls wasted 38.34% of feed provided; SM100 (10.64%) and SM75 (3.84%) wasted significantly less. Mean FCRs were controls (1.60), SM100 (0.98), SM75 (0.80); treatments were significantly below controls. Mean feces produced per feed consumed (%) were controls (5.54), SM100 (4.00), and SM75 (3.81). Treatments were significantly below controls by approximately 30%. Control and treatment SGRs did not differ; full catch-up growth occurred in treatments. Feeding hybrid bluegills on cycles of MF followed by higher submaximum feeding reduced waste feed and feces while improving FCRs. Maintenance/submaximum feeding may be applicable in aquaculture for reducing feed costs and improving effluent quality without reducing growth.
- 出版日期2010-7
