Proceedings
Systems analysis techniques that have been applied to evaluation of beef production systems are being applied and extended to evaluation of goat and sheep production systems as part of the USAID Title XII Small Ruminants CRSP. The goat simulation model is designed to predict productivity based upon genetic potential, feed resources and management practices. This model incorporates functional biological relationships so that the field of application may be extended, with adaptation for each specific setting, to many different types of production systems. The model simulates growth, milk production, fertility, gestation and health status of individual animals. Effects of both energy and protein deficiencies are included. Nutrients are partitioned among the different requirements on a priority basis. The animal can mobilize body fat and lean to help meet nutrient requirements. Genetic potential is specified in terms of mature weight, maturing rate, milk production, ovulation rate and seasonality of estrus. Forage digestibility, crude protein percentage and maximum per head availability must be externally specified. No effects of animal management on the grazing resource are included. The model permits the specification of almost any management regiment in terms of breeding season, weaning age, supplement feeding, sales policies, dual-purpose, etc. Data are stored on individual animals which can be divided into 14 classes and 12 mating groups in up to 6 separate flocks. Simulations are run on 15-day time steps. The model is programmed in FORTRAN with double-linked lists used to organize records
| Main Authors: | , , , |
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| Format: | biblioteca |
| Published: |
Scottsdale, AZ (EUA)
1982
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| Subjects: | CAPRINOS, MODELOS DE SIMULACION, PRODUCCION ANIMAL, CRECIMIENTO, REPRODUCCION, SALUD ANIMAL, PRODUCCION DE LECHE, ESTADOS UNIDOS DE AMERICA, |
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