BIOECONOMIC MODEL OF EASTERN BALTIC COD UNDER THE INFLUENCE OF NUTRIENT ENRICHMENT
Article first published online: 8 OCT 2012
Copyright © 2012 Wiley Periodicals, Inc.
Natural Resource Modeling
Volume 26, Issue 2, pages 259–280, May 2013
How to Cite
THANH, N. V. (2013), BIOECONOMIC MODEL OF EASTERN BALTIC COD UNDER THE INFLUENCE OF NUTRIENT ENRICHMENT. Natural Resource Modeling, 26: 259–280. doi: 10.1111/j.1939-7445.2012.00137.x
- Issue published online: 22 APR 2013
- Article first published online: 8 OCT 2012
- Received by the editors on 6th july 2012. Accepted 4th june 2012.
- Bioeconomic model;
- Eastern Baltic cod;
Abstract The objective of this paper is to study the economic management of Eastern Baltic cod (Gadus morhua) under the influence of nutrient enrichment. Average nitrogen concentration in the spawning areas during the spawning season of cod stock is chosen to be an indicator of nutrient enrichment. The optimal cod stock is defined using a dynamic bioeconomic model for the cod fisheries. The results show that the current stock level is about half of the estimated optimal stock level and that the current total allowable catch (TAC) is about one-fourth of the optimal equilibrium yield. The results also indicate that the benefit from a reduction in nitrogen very much depends on the harvest policies. If the TAC is set equal to the optimal equilibrium yield, the benefit of a nitrogen reduction from the 2009 level to the optimal nitrogen level would be about 604 million DKK over a 10-year time horizon, given a discount rate of 4% per year. However, if a recovery management plan is chosen, the benefit would only be about 49 million DKK over a 10-year time horizon.