해상 가두리 내 동갈돗돔 (Hapalogenys nigripinnis) 치어의 성장, 사료 섭취, 체성분 및 혈액성상에 미치는 사료 공급 횟수의 영향

Abstract

A 60 days feeding trial was conducted to investigate the influence of feeding frequency on growth, food consumption and body composition of feeding frequency for juvenile short barbeled velvetchin. Triplicate groups of fish (mean body weight of 28.8 g) were hand-fed to visual satiety with four different feeding frequencies (one to four meals daily) in 12 rectangular sea cage with 15 juveniles per each cage respectively. Weight gain, specific growth rate and feed intake of fish fed three and four meals per day were significantly (P < 0.05) higher than those of fish fed one and two meals per day. Feed efficiency and inter-individual size variation in weight were not significantly affected by feeding frequency (P > 0.05). Three and four meals per day had significantly higher mean food consumption at 08:30 compared to that at other feeding time. Crude lipid content of the fish fed three and four meals per day was significantly higher than those of one and two meals (P < 0.05) but was not significantly different between three and four meals (P > 0.05). The contents of GOT and GPT in fish fed one meal per day were significantly lower than those of other groups (P < 0.05). Our results suggest that an optimum feeding frequency for improving growth of juvenile short barbeled velvetchin weighing from 30 to 150 g reared in sea cage is three meals per day under our experimental conditions.