globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2008001117
论文题名:
Catch-quota matching allowances balance economic and ecological targets in a fishery managed by individual transferable quota
作者: Oostdijk M.; Byrne C.; Stefánsson G.; Santos M.J.; Woods P.J.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:40
起始页码: 24771
结束页码: 24777
语种: 英语
英文关键词: Catch-quota balancing ; Fisheries management ; Incentives
Scopus关键词: article ; Atlantic cod ; fishery management ; fishing ; nonhuman ; target organism
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164010
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(40)
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