Approximately Optimal Recovery of a Multicohort Fishery from Depleted Stocks and Excess Vessel Capacity
作者:
KennedyJohn O. S.,
期刊:
Journal of the Operational Research Society
(Taylor Available online 1989)
卷期:
Volume 40,
issue 3
页码: 231-241
ISSN:0160-5682
年代: 1989
DOI:10.1057/jors.1989.34
出版商: Taylor&Francis
关键词: dynamic programming;fisheries management;irreversible decisions;multicohort model
数据来源: Taylor
摘要:
AbstractThe effect of current harvesting on future fish stocks is best captured with a multicohort model. In principle, numerical dynamic programming can be used to determine optimal harvesting for any level of fish stocks. In practice, applications to long-lived species of fish have been limited because of the need to have a state variable for each cohort. The problem is further increased if vessel capacity is included as a state variable. Ignoring excess vessel capacity in a fishery with depleted stocks is likely to lead to recommendations for overly drastic reductions in catch. A method is proposed for finding approximately optimal harvesting policies for a multicohort fishery, taking account of changing harvesting capacity. The method is illustrated for the southern bluefin tuna fishery.
点击下载:
PDF (4856KB)
返 回