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首页> 外文期刊>ICES Journal of Marine Science >Technical and economic efficiency analysis of the Portuguese artisanal dredge fleet
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Technical and economic efficiency analysis of the Portuguese artisanal dredge fleet

机译：葡萄牙手工挖泥船队的技术和经济效率分析

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摘要

An efficiency analysis of the commercial dredge fleet operating along the south coast of Portugal between 2005 and 2007 sought to determine the efficiency of the vessels using data envelopment analysis models, considering fixed inputs (vessel power, length, tonnage, and an indicator of stock biomass) and a variable input (number of days at sea). The annual quota per vessel was also included in the model as a contextual factor. In the technical-efficiency (TE) analysis, outputs were defined by the catch weight for each of the three target species (bivalves). Using price data for each species in the wholesale market, revenue efficiency was also estimated to complement the TE analysis. The advantage of the approach lies in the ability to separate technical aspects from allocative aspects in the efficiency assessment, allowing two-dimensional graphic representation of vessel performance. The procedure allows the identification of benchmark vessels, which maximized the catch weight of the species landed, given their inputs, as well as the vessels that selected the appropriate target species to maximize the revenue of the fishing activity, given output prices. The approach also allowed the specification of targets for inefficient vessels that correspond to the catch by species, permitting revenue maximization from fishing.
机译：对2005年至2007年期间在葡萄牙南海岸经营的商业挖泥船队进行的效率分析，旨在使用数据包络分析模型来确定船只的效率，同时考虑固定投入（船只的功率，长度，吨位和储备生物量指标） ）和变量输入（海上航行天数）。模型中还包括每艘船的年度配额作为背景因素。在技​​术效率（TE）分析中，产量由三种目标物种（双壳类）中每种的捕捞量定义。使用批发市场中每个物种的价格数据，还可以估算收入效率，以补充TE分析。该方法的优势在于能够将效率评估中的技术方面与分配方面分开，从而能够以二维图形方式表示船舶性能。该程序可以确定基准渔船，在给定输入的情况下，该渔船可最大程度地降低登陆物种的捕捞重量，以及在给定产出价格的情况下，选择适当目标物种的渔船，以使捕捞活动的收入最大化。这种方法还可以为低效率船只的目标制定规格，该目标与按种类捕获的渔获量相对应，从而使捕捞收入最大化。

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