Effect of feed deprivation on compensatory growth in juvenile rock bream Oplegnathus fasciatus
A feed-deprivation study was conducted for 9 weeks with four feeding regimes, estimating compensatory growth and proximate composition of rock bream Oplegnathus fasciatus (56.0 ± 0.9 g). Feeding regimes included continuous feeding (control), feed-deprivation for 1 week (S1) in week 3, for 2 weeks (S2, weeks 2–3), and for 3 weeks (S3, weeks 1–3). Following 3 weeks, fish were on a continuous feeding regime for the remaining period. Complete compensation was achieved in S1 and S2 after resuming feeding for 3 weeks and 6 weeks. Although specific growth rate, feeding rate and feed efficiency in S3 were higher than in the control during the feeding resumption period, S3 fish did not catch up the body weight of control fish by the end of the experiment. At the end of the feed-deprivation period, the ratio of lipid to lean body mass and the levels of protein, lipid, and energy in S1, S2 and S3 were lower than those in the control. After feeding resumption for 6 weeks, protein and lipid contents in S3 were significantly (P < 0.05) lower than those in the control. Rock bream with single-phase feed-deprivation for 1–2 weeks could exhibit full compensatory growth after feeding resumption for 3–6 weeks under our experimental conditions.
KeywordsCompensatory growth Fasting Feed intake Oplegnathus fasciatus
This research was supported in part by the project titled “Development of Fish Aquaculture Technology using the Net Cage at Coastal Area of Ulleung Island (Project No. 20150367, PM60410)” funded by the Ministry of Oceans and Fisheries, Republic of Korea and “Technology Development of Long-term Environmental Monitoring System and the Safety Standards of Maritime Activities to Solve Environmental and Safety Issues due to the Offshore Wind Farm of the Korea Institute of Energy Technology Evaluation and Planning (KETEP, No. 20163010024660, PN67850)” granted financial resources from the Ministry of Trade, Industry & Energy, Republic of Korea. The authors thank Luke A. Roy for his helpful comments and revisions on an early version of the manuscript.
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