OPTIMAL MANAGEMENT OF INVASIVE SPECIES WITH DIFFERENT REPRODUCTION AND SURVIVAL STRATEGIES
Article first published online: 2 JAN 2012
Copyright ©2011 Wiley Periodicals, Inc.
Natural Resource Modeling
Volume 25, Issue 4, pages 599–628, November 2012
How to Cite
ELOFSSON, K., BENGTSSON, G. and GREN, I.-M. (2012), OPTIMAL MANAGEMENT OF INVASIVE SPECIES WITH DIFFERENT REPRODUCTION AND SURVIVAL STRATEGIES. Natural Resource Modeling, 25: 599–628. doi: 10.1111/j.1939-7445.2011.00115.x
- Issue published online: 4 NOV 2012
- Article first published online: 2 JAN 2012
- Received by the editors on 20th October 2011. Accepted 22nd November 2011.
- Invasive species;
- resident species;
- age-structured model;
- numerical optimization
Abstract In this paper, a numerical model is developed for analyzing the role of species life history and age structure for the optimal management of a commercial resident species that is exposed to an invasive species. It is shown that reproduction and mortality characteristics of both species ands age structure of the invader at the time of invasion are important for the costs of invasions when the invader and resident species compete for scarce resources. Commercially harvested species with low juvenile survival and high reproduction are found to be economically more robust against invasions. Species with these life-history traits are also the most damaging as invaders. Properties of the harvesting cost function and the discount rate are shown to be of importance for the development of the invader population over time. Hence, it is possible to identify specific combinations of life-history characteristics and economic conditions under which invasions cause particularly large economic damage.