Poos, J. J., Turenhout, M. N. J., van Oostenbrugge, H., and Rijnsdorp, A. D. 2013. Adaptive response of beam trawl fishers to rising fuel cost – ICES Journal of Marine Science, 70: 675–684. In this paper, we develop models to test different hypotheses on the optimal towing speed at which fuel savings are traded off against the reduction in catch due to the decrease in swept area. The model predicts that optimal towing speed is a decreasing function of fuel price and an increasing function of fish abundance and price. The model was fitted to vessel monitoring system (VMS) data. By means of mixture analysis, these VMS data were attributed to one of three behavioural modes: floating, towing, or navigating. Data attributed to the towing mode were used to determine the model that best fit the data. The preferred model includes a maximum towing speed and a component describing the decline in catch efficiency with decreasing towing speed. Towing speed is reduced by up to 14%. The savings obtained by reducing towing speed were estimated for each month and showed that vessels reduced their fuel consumption by between 0 and 40%.
This memorandum provides an estimation of the costs for four variant closures for the protection of the benthic ecosystem on the Frisian Front and the Central Oyster Grounds for the Dutch fishing sector in addition to the cost-benefit analysis carried out in Van Oostenbrugge et al. (2015). The two preferential variants lead to similar costs for the fisheries sector, whereas the costs of the two alternative combinations are either 20% higher or lower. The user may reproduce, distribute and share this work and make derivative works from it. Material by third parties which is used in the work and which are subject to intellectual property rights may not be used without prior permission from the relevant third party. The user must attribute the work by stating the name indicated by the author or licensor but may not do this in such a way as to create the impression that the author/licensor endorses the use of the work or the work of the user. The user may not use the work for commercial purposes.LEI accepts no liability for any damage resulting from the use of the results of this study or the application of the advice contained in it. Depending on the assumptions taken, the total costs for the Dutch fishing sector, measured as the negative effect on net present value of the gross value added, range from 0 to 8.9m euro. From the compiled overview of costs (Table S.1) the variants can be characterised as follows. COA_FFAPreferential variant A comprises three larger areas, one in the Central Oyster Grounds and two in the etc.) and the behavioural changes of fishermen and their economic consequences. Displacement scenario C assumes that the fishermen will be able to reallocate their fishing activities without having any costs. S.2 Complementary findingsWhen compared to the original variants as defined in Van Oostenbrugge et al. (2015), The costs for the Dutch fishing sector were estimated using the methodology developed by Van Oostenbrugge et al. (2015). The main steps taken are: An inventory of the fishing activities in the variants is based on an analysis of detailed vessel position data (VMS), official logbook data and economic data from the LEI panel. Estimation of the economic value of the areas were made using four Policy, Economy and Innovation scenarios (PEI scenarios) which combined expected developments on fish stocks, fish prices, fuel prices, technical developments, management measures and other area closures. Costs of closing the areas were assessed using three displacement scenarios. These were based on scientific publications (scenario A), expert knowledge from the fishing sector (scenario B) and the assumption that the sector would be able to reallocate their activities without any costs (scenario C). The resulting costs were combined into one indicator for the economic costs: the Net Present Value of the gross value added over a 30-year period. De daaruit volgende kosten werden samengevoegd tot één indicator voor de economische kosten:de netto contante waarde van de bruto toegevoegde waarde ...
Report 2016-104. 32 pp.; 18 fig.; 1 tab.; 5 ref. This study examines the economic consequences of the transition from beam trawl fisheries to pulse fisheries. It focuses on the economic results, fishing effort, fuel consumption, price of sole quotas and catch-based pay levels. It also examines the extent to which there has been a geographical displacement in fishing areas since the introduction of pulse technique.
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