青岛斋堂岛海域张网渔业经济效益分析

Economic benefit analysis of stow net fishery in the coast of the Zhaitang Island, Qingdao

本文分析研究了2014年4月和10月青岛斋堂岛海域张网渔业的经济效益。结果表明:(1)张网渔业渔获物中不同种类价格差异极大,且多为低经济价值渔获种类。(2)4月甲壳类(三疣梭子蟹等)和软体类(短蛸)的捕获量决定了张网作业的经济效益;舒氏海龙、玉筋鱼等小型、低值种类的经济价值不足以弥补其上岸成本,可以适当增加网囊网目尺寸来释放这些低值渔获;(3)10月平均网产比4月高142.2%,但渔获上岸价格低于4月,导致10月张网作业经济效益为负值,处于投入大于产出的亏本状态。研究结果为选择性渔具的开发和张网渔业的"减船转产"提供了参考依据。

The economic benefit of stow net fishery off the Zhaitang Island from April to October in 2014 was studied in this paper. The results showed that： （1） most of the catches belonged to species of low economic values, and there was significant difference among the prices of different species. （2） In April, Portunus trituberculatus and Octopus ocellatus are the main commercial species, which contributes the majority of the total economic benefit of stow net fishery. The economic value of other low value species, such as Ammodytes personatus and Syngnathus schlegeli, is less than the cost of landing. Therefore, larger mesh size should be applied to release this portion of the catches. （3） The economic benefit in October is negative because of the low quay price, although the catch per unit effort （CPUE） increased to 242.2% of that in April. The results provide a reference for the development of the selective fishing gear and for the decrease of stow fishing vessels.