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首页> 外文期刊>ICES Journal of Marine Science >Is size-dependent pricing prevalent in fisheries? The case of Norwegian demersal and pelagic fisheries
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Is size-dependent pricing prevalent in fisheries? The case of Norwegian demersal and pelagic fisheries

机译：规模大小定价在渔业中盛行吗？挪威水下和远洋渔业案例

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摘要

It is commonly acknowledged that body weight offish is a key factor in determining market value of landed catch, thus influencing optimal harvest strategies. However, in management strategy evaluations and bioeconomic modelling, body size is often an overlooked economic parameter, and there are no systematic studies on the prevalence of size-dependent pricing. Here we assess the presence and magnitude of size-dependent pricing in ex-vessel prices offish in Norwegian fisheries. The data encompass landings of four pelagic and four demersal stocks in Norway in 2000-2010. Linear mixed models and generalized additive models were used to determine the dependence of unit price on weight class as well as on total yield and time (year). The results show a significant positive relationship between weight class and price for seven out of the eight examined fish stocks. The relative effect of body weight on price was the strongest for cod, Greenland halibut, Norwegian spring-spawning herring and mackerel, lesser for North Sea herring and saithe.and negligible for horse mackerel. These findings demonstrate that size-dependent pricing is common in Norwegian fisheries, and is therefore of high relevance for resource economics and fisheries management.
机译：众所周知，鱼的体重是决定着陆渔获物市场价值的关键因素，从而影响最佳的捕捞策略。但是，在管理策略评估和生物经济建模中，体型通常是一个被忽视的经济参数，并且没有关于体型依赖定价的普遍性的系统研究。在这里，我们评估了挪威渔业中鱼类出船前价格中大小相关定价的存在和严重性。数据包括2000-2010年挪威4个中上层和4个深海鱼类的登陆量。线性混合模型和广义加性模型用于确定单价对重量类别以及总产量和时间（年）的依赖性。结果表明，在八种被检查的鱼类种群中，有七种的体重类别与价格之间存在显着的正相关关系。体重对价格的相对影响最强的是鳕鱼，格陵兰大比目鱼，挪威春季产卵的鲱鱼和鲭鱼，北海鲱和赛德鱼的影响较小，而竹荚鱼则微不足道。这些发现表明，规模依赖定价在挪威渔业中很普遍，因此与资源经济学和渔业管理高度相关。

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