THE DYNAMICS OF AN ANIMAL—VEGETATION SYSTEM: SHEEP FARMING
Article first published online: 9 AUG 2013
Copyright © 2013 Wiley Periodicals, Inc.
Natural Resource Modeling
Volume 27, Issue 1, pages 80–103, February 2014
How to Cite
DA ROCHA, J.-M. and SKONHOFT, A. (2014), THE DYNAMICS OF AN ANIMAL—VEGETATION SYSTEM: SHEEP FARMING. Natural Resource Modeling, 27: 80–103. doi: 10.1111/nrm.12020
- Issue published online: 23 JAN 2014
- Article first published online: 9 AUG 2013
- Manuscript Accepted: 12 JUL 2013
- Manuscript Received: 16 NOV 2012
- Sheep farming;
- vegetation growth;
The paper studies the economy and ecology of sheep farming at the farm level in a Nordic context, with a crucial distinction between the outdoors grazing season and the winter indoors feeding season, and where climate conditions fix the length of the grazing season. Two different categories of animals, ewes (adult females) and lambs, and one plant species are included in our ecological model. The farmer is assumed to maximize present-value profit where the revenue is made up income from meat and wool production. We find that livestock cycles may represent an optimal management policy. We also show that in a possible steady state with a constant number of animals and constant vegetation quantity, slaughtering either only lambs or only ewes is optimal.