气候变化领域集成服务门户(CCPortal): Catch-quota matching allowances balance economic and ecological targets in a fishery managed by individual transferable quota

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DOI	10.1073/pnas.2008001117
	Catch-quota matching allowances balance economic and ecological targets in a fishery managed by individual transferable quota
	Oostdijk M.; Byrne C.; Stefánsson G.; Santos M.J.; Woods P.J.
发表日期	2020
ISSN	0027-8424
起始页码	24771
结束页码	24777
卷号	117 期号:40
英文摘要	Fishers with individual catch quota, but limited control over the mix of species caught, depend on trade and catch-quota balancing allowances to fully utilize their quota without discarding. However, these allowances can theoretically lead to overfishing if total allowable catches (TACs) are consistently exceeded. This study investigates usage of balancing allowances by the Icelandic demersal fleet over 2001-2017, for over 1,900 vessels. When a vessel's demersal catch exceeds owned and leased quota for a given species, the gap can be bridged by borrowing quota from the subsequent fishing period or transforming unutilized quota in other species, restricted by limits. Conversely, excess quota can be saved or transformed into quota for species where there is a shortfall. We found evidence that balancing behavior is frequently similar across the fleet. Transformations are consistent with indicators of a general quota shortage and potential for arbitrage caused by differences in conversion ratios used for transformation and lease prices. Larger companies contribute more to these patterns. Nevertheless, TAC overages are generally modest especially in recent years-key reasons appear to be the tightening of vessel transformation limits and the central role of Atlantic cod, which is the main target species but cannot be persistently overfished due to a specific prohibition on positive transformations into the species. These results show how the tailored design of the Icelandic catch-quota balancing system has helped in balancing economic and ecological goals of management.We suggest policy changes that could further reduce ecological risks, e.g., prioritizing between-year transfers over transformations. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Catch-quota balancing; Fisheries management; Incentives
语种	英语
scopus关键词	article; Atlantic cod; fishery management; fishing; nonhuman; target organism
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160780
作者单位	Oostdijk, M., Department of Life and Environmental Sciences, University of Iceland, Reykjavík, 101, Iceland, Environment and Resource Dynamics Group, Department of Physical Geography, Stockholm University, Stockholm, 114 19, Sweden; Byrne, C., Department of Environment and Natural Resources, University of Iceland, Reykjavik, 101, Iceland; Stefánsson, G., Science Institution, University of Iceland, Reykjavik, 107, Iceland; Santos, M.J., University Research Priority Program in Global Change and Biodiversity, University of Zurich, Zurich, 8057, Switzerland, Department of Geography, University of Zurich, Zurich, 8057, Switzerland; Woods, P.J., Demersal Division, Marine and Freshwater Research Institute, Hafnafjör ur, 220, Iceland
推荐引用方式 GB/T 7714	Oostdijk M.,Byrne C.,Stefánsson G.,et al. Catch-quota matching allowances balance economic and ecological targets in a fishery managed by individual transferable quota[J],2020,117(40).
APA	Oostdijk M.,Byrne C.,Stefánsson G.,Santos M.J.,&Woods P.J..(2020).Catch-quota matching allowances balance economic and ecological targets in a fishery managed by individual transferable quota.Proceedings of the National Academy of Sciences of the United States of America,117(40).
MLA	Oostdijk M.,et al."Catch-quota matching allowances balance economic and ecological targets in a fishery managed by individual transferable quota".Proceedings of the National Academy of Sciences of the United States of America 117.40(2020).