Productivity Impacts of Veil Nets on UK Crangon Vessels
研究了英国褐虾渔船强制使用细网后，实际生产率下降约14%，采用生产前沿方法估计，对渔业管理者和政策制定者有参考价值。
Abstract As with many shrimp fisheries, the North Sea brown shrimp (Crangon crangon) fishery has been characterised by by‐catch and discarding of juvenile fish species that are of value to other fleet segments. To offset this externality, the mandatory use of veil nets or separator panels was introduced in 2003 for all vessels using an aggregate beam length of more than 8 m. Sea trials prior to this date suggested that retained catch might be reduced by between 8% and 35%, depending on the area and season. These studies, however, do not consider the behavioural response by fishers to reduce this impact. In this study, the actual impact of the restrictions on the productivity of UK Crangon vessels was estimated using a production frontier approach. The ex post analysis suggests that a productivity decline of around 14% has been experienced by UK vessels adopting this gear.