Energy and protein metabolism between 3 and 6 weeks of age of male broiler chickens selected for growth rate or for improved food efficiency
- 1 May 1998
- journal article
- research article
- Published by Taylor & Francis in British Poultry Science
- Vol. 39 (2) , 264-272
- https://doi.org/10.1080/00071669889231
Abstract
1. A new open-circuit respiration unit consisting of 6 respiration chambers, gas analysis unit and data-acquisition system is briefly described. 2. Energy and protein metabolism in broiler lines selected for improved food efficiency (FC) or for growth rate (GL) were measured weekly from 3 to 6 weeks of age. 3. Gross and apparent metabolisable energy intake per kg W 0.75 was on average higher for GL than for FC chickens without differences in metabolisability. Fed and fasted heat production per kg W 0.75 did not differ between the lines. FC chickens retained less energy per kg W 0.75 than GL chickens. 4. FC chickens deposited much less of the retained energy as fat than their GL counterparts and also showed greater protein conversion efficiency. The leaner composition of the body weight gain in FC chickens was confirmed by the estimated lower fat deposition per kg W 0.75 and by the lower fat protein ratio.Keywords
This publication has 17 references indexed in Scilit:
- Temporal Secretory Patterns of Growth Hormone in the Danish Broiler Lines Selected for High Body Weight or for Improved Food EfficiencyActa Agriculturae Scandinavica, Section A — Animal Science, 1995
- Further investigations on protein requirement of genetically lean and fat chickensBritish Poultry Science, 1991
- Muscle protein turnover in chickens selected for increased growth rate, food consumption or efficiency of food utilisation: Effects of genotype and relationship to plasma IGF‐I and growth hormoneBritish Poultry Science, 1991
- Energy and nitrogen retention and loss in broiler chickens genetically selected for leanness and fatnessBritish Poultry Science, 1988
- Experimental divergent selection on abdominal fat in broilers — parental female and male type lines and their crossesPublished by Elsevier ,1988
- Genetic selection of meat-type chickens for high or low abdominal fat contentPublished by Elsevier ,1988
- Methods of Measuring Energy Utilization in Broilers: Effect of Genetic Line and Presence of Supplemental Dietary FatPoultry Science, 1985
- Energy and nitrogen metabolism of broilers selected over ten generations for increased growth rate, food consumption and conversion of food to gainBritish Poultry Science, 1984
- Selecting Broilers for Low or High Abdominal Fat: Comparison of Energy Metabolism of the Lean and Fat LinesPoultry Science, 1982
- Selection for food conversion in broilers: Body composition of birds selected for increased body‐weight gain, food consumption and food conversion ratioBritish Poultry Science, 1979