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首页> 外文期刊>ICES Journal of Marine Science >Reducing discards in a temperate prawn trawl fishery: a collaborative approach to bycatch research in South Australia
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Reducing discards in a temperate prawn trawl fishery: a collaborative approach to bycatch research in South Australia

机译：减少温带虾拖网渔业中的丢弃物：南澳大利亚副渔获物研究的合作方法

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摘要

We present the outcomes of a collaborative research programme tasked with reducing bycatch, and thus discards in a temperate Australian prawn trawl fishery. Sea trials in the Gulf of St Vincent, South Australia, assessed the performance of a modified trawlnet that incorporated a rigid polyethylene grid and a T90-mesh codend. Compared with conventional designs, the modified net yielded marked reductions in bycatch (cumulatively >81% by weight), with pronounced decreases in sponge (92%), elasmobranchs (80%), teleost fish (71%), molluscs (61%), and crustaceans (78%). Using commercial logbook data, we estimate that the use of modified nets could reduce discards by similar to 240 tons per year. This outcome was achieved with moderate declines in the catch rate (kg h(-1)) of the target species, Western King Prawn (mean similar to 15%), of which almost all were small adults of low commercial value. Adoption of the modified net by industry was realized in March 2012, because it met environmental objectives (i.e. reducing bycatch and improving public perceptions of sustainability), reduced prawn damage, demonstrated commensurate financial returns, and engaged stakeholders throughout the development process. Overall, the project provides a useful example of bycatch research with demonstrable outcomes of improving the ecological and economic sustainability of prawn harvests.
机译：我们介绍了一项旨在减少副渔获物的合作研究计划的成果，从而减少了在温带的澳大利亚对虾拖网渔业中的丢弃物。在南澳大利亚州圣文森特湾的海上试验中，评估了一种改良的拖网的性能，该拖网结合了刚性聚乙烯网格和T90网眼编码网。与传统设计相比，改良网捕捞的副渔获物明显减少（累计> 81％（重量）），其中海绵（92％），弹bra（80％），硬骨鱼（71％），软体动物（61％）明显减少。和甲壳类动物（78％）。使用商业日志数据，我们估计使用改进的网每年可以减少约240吨的丢弃物。这一结果是通过目标物种西方国王虾的捕获率（kg h（-1））适度下降而实现的（平均水平约为15％），其中几乎所有都是具有较低商业价值的小成年。工业界在2012年3月实现了对改良网的采用，因为它满足了环境目标（即减少兼捕和改善公众对可持续性的认识），减少了虾的损害，显示了相称的财务回报并在整个开发过程中吸引了利益相关者。总体而言，该项目为兼捕研究提供了有用的实例，其可证明的结果是改善了对虾收获的生态和经济可持续性。

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