caa a22 4500 465744591 CHVBK 20180323111817.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF02239829 doi (NATIONALLICENCE)springer-10.1007/BF02239829 Baptist Richard Department of Animal Production, University of Nairobi, PO Box 29053, Nairobi, Kenya aut Simulated livestock dynamics—Effects of pastoral offtake practices and drift on cattle wealth [Elektronische Daten] [Richard Baptist] Simulation De Developpement De Troupeaux. Consequences Des Prelevements Pastoraux Sur Le Rendement Optimal Du Cheptel Simulacion De La Dinamica Ganadera-Efecto De Practicas Pastorales Extractivas Y Rumbo Sobre El Bienestar Pecuario Summary: Pastoral cattle herds were simulated to demonstrate a species-independent package (DADAS) for the analysis and simulation of livestock dynamics. A cow culling age of 11 years was expected to maximise offtake rate and to stabilise the cattle population. This threshold was derived by the deterministic module of the package used. A closer look at six offtake patterns using the stochastic module of the simulation program revealed that those who cull cows at an age limit would fare less well than those who cull cows only when sterile. Within each offtake pattern the cumulative effects of chance fluctuations in sex-ratio of calves, mortality, sterility, age at first calving and calving interval resulted in cattle wealth indicators varying widely between replicate herds. The example shows that livestock dynamics simulation on personal computers is feasible for planning, teaching and research purposes. Centre for Tropical Veterinary Medicine, 1990 Tropical Animal Health and Production Kluwer Academic Publishers-Human Sciences Press 22/2(1990-06-01), 67-76 0049-4747 22:2<67 1990 22 11250 https://doi.org/10.1007/BF02239829 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02239829 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Baptist Richard Department of Animal Production, University of Nairobi, PO Box 29053, Nairobi, Kenya aut NATIONALLICENCE 773 0- Tropical Animal Health and Production Kluwer Academic Publishers-Human Sciences Press 22/2(1990-06-01), 67-76 0049-4747 22:2<67 1990 22 11250 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer