Feeding Strategy Does Affect Carbohydrate Utilization by Hybrid Tilapia <i>Oreochromis niloticus×O. aureus</i>

  • Shiau Shi-Yen
    Department of Food Science, National Taiwan Ocean University
  • Lei Min-Shyan
    Department of Food Science, National Taiwan Ocean University

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Other Title
  • Feeding Strategy Does Affect Carbohydrate Utilization by Hybrid Tilapia Oreochromis niloticus×O.aureus
  • Feeding Strategy Does Affect Carbohydrate Utilization by Hybrid Tilapia Oreochromis niloticus O.aureus
  • Feeding Strategy Does Affect Carbohydrate Utilization by Hybrid Tilapia <i>Oreochromis niloticus&times;O. aureus</i>

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Abstract

An eight-week growth trial was conducted to evaluate the effect of feeding strategy (continuous fed vs two meals per day) on the utilization of carbohydrate by juvenile hybrid tilapia, Oreochromis niloticus×O. aureus. The carbohydrates were starch and glucose, and included at 44% of the diet. Average initial body weight of the fish was 0.47±0.01g, and fish were fed at a rate of 5% body weight per day. The results indicated that weight gain was significantly higher (p<0.05) for fish fed continuously than for those fed two meals a day for both carbohydrate diets. Higher hepatic phosphofructokinase (PFK) and malic enzyme (ME) activities were observed in the continuous-fed fish than in meal-fed fish. Hepatic asparate transaminase (AST) and alanine transaminase (ALT) activities of the continuous-fed fish with glucose diet were lower than those of the meal-fed fish. Plasma AST and ALT activities were higher in the meal-fed fish than in the continuous-fed fish. These data suggest that carbohydrate utilization by tilapia is affected by feeding strategy and that continuous fed improves carbohydrate utilization.

Journal

  • Fisheries science

    Fisheries science 65 (4), 553-557, 1999

    The Japanese Society of Fisheries Science

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