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Abstract
1. The relative rates of development in a commercial layer and a broiler strain of chicken fed 180 or 230 g crude protein/kg were investigated by the use of the allometric‐autoregressive model. Development was divided into pre‐pubertal (0 to 8 weeks) and puber‐tal phases (8 to 22 weeks).
2. Significant strain effects were observed, at all ages, in rates of gain of live (L) body mass, carcase (C) mass, non‐carcase (N) mass and empty‐body (EB) mass as well as C, N and EB moisture, protein and fat content.
3. Significant dietary effects were observed in C and EB fat in the pre‐pubertal phase and L mass, N protein and C fat in the subsequent pubertal period.
Notes
Present address: Animal and Dairy Science Research Institute, Private Bag X2, Irene 1675, Republic of South Africa.