Within the EU, it is agreed that watershed-based management of water quality problems is likelyto be more economically efficient compared to existing institutional arrangements. Watershedauthorities, assigned under the European Water Framework Directive, do however lack financialresources for...

In this paper, a numerical model is developed where the role of species life history and age structure for the optimal management of a harvested resident species which is exposed to an invasive species. It is shown that reproduction and mortality characteristics of both species as well as age...

Within the EU, it is agreed that watershed-based management of water quality problems is likely to be more economically efficient compared to existing institutional arrangements. Watershed authorities, assigned under the European Water Framework Directive, do however lack financial resources for...