먹이 공급 제한이 볼락 Sebastes inermis의 보상성장과 체성분에 미치는 영향

Abstract

Compensatory growth and chemical composition of dark-banded rockfish (mean weight: 13.6 g) were examined after fish had experienced five different pre-feeding regimes. Fish were fed at 0% (R0), 25% (R25), 50% (R50), 75% (R75) and 100% (control) satiation for2 wk before satiation feeding for 5 wk. Fish of R75 and R50 achieved the same body weight as the control fish after satiation feeding for 2 and 5 wk, respectively. Although the specific growth rate and feed efficiency of R25 andR0 fish were higher than those of the control fish during the first 3 wk of satiation feeding, they did not caught up with the body weight of the control fish. At the Week 2 and Week 7, the ratios lipid to lean body mass of R50, R25 and R0 fish were significantly lower than those of control fish, and there was no difference between the control and R75 fish. This result suggests that the fish subjected to a proper pre-restricted feeding (50-75% satiation) for 2 wk result in complete compensatory growth, while the fish experienced more severe feed restriction (0-25% satiation) show a partial compensatory growth capacity.