Effects of feeding rate on conversion efficiency and chemical composition of the fishTilapia mossambica

✍ Scribed by T. J. Pandian; R. Raghuraman

• Publisher: Springer-Verlag
• Year: 1972
• Tongue: English
• Weight: 783 KB
• Volume: 12
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00350747

✦ Synopsis

Average daily rations of 14, 35 or 58 mg Tubi]ex tubi/ex worm per gram of the fish Tilapia mossambica PETERS represent maintenance, optimum or maximum feeding Levels. At these levels, conversion efficiency (K1) is 5, 9 or 24 %. An amount of 65 mg worm/g fish/day, when fed under experimental conditions, is converted with the poorest conversion efficiency (4%). Test individuals fed at 11 to 49 mg worm/g fish/day show a decreasing trend in water content (78A to 74.8 %), and an increasing trend in fat content (32A to 44.2 %). Below or above this feeding rate range, water content increases, while fat content decreases. The range of individual variations in fat content is nearly 3 times greater than that of ash and 15 times greater than that of water. Test individuals starved for 60 days lose 2A mg dry body weight/g/day. This loss is contributed by calorifically equivalent amounts of fat and protein. The endogenous loss of nitrogen by these individuals averaged 0A8 mg N/g body weight/day.