Cerbule Kristine, Grimsmo Leif, Herrmann Bent, Grimaldo Eduardo
Department of Fisheries Technology, SINTEF Ocean, Trondheim, Norway.
UiT the Arctic University of Norway, Tromsø, Norway.
Heliyon. 2023 Feb 17;9(3):e13820. doi: 10.1016/j.heliyon.2023.e13820. eCollection 2023 Mar.
The use of food grade wild-captured species as bait for other fisheries questions the sustainability of food production. In pot fisheries, bait is an important factor determining the effectiveness of the gear. In snow crab () fishery, the pots are normally baited with squid ( sp.) and herring (). This fishery uses substantial amounts of bait for each pot deployment, and it constitutes one of the largest expenses for operating the pots along with costs for fuel. Furthermore, reliance on bait that originates from wild-capture fisheries questions economic and environmental sustainability, and involves additional use of fuel for capture and transportation of the bait which increases the carbon footprint of the industry. Therefore, the use of alternative bait sources is needed. One such alternative bait source can be originating from processed by-products from commercial fisheries. However, for the new bait to be acceptable for the fishery, it must provide comparable catch efficiency as the traditional bait. Therefore, this study aimed at comparing the performance of a new experimental bait against the traditionally used squid bait in the Barents Sea snow crab fishery. The results showed no statistically significant difference in catch efficiency of target-sized snow crab. Specifically, a formal uncertainty estimation based on nested bootstrapping showed that there was no significant difference in efficiency between bait types for target-sized individuals for soak times typically employed in the fishery. Thereby this shows a potential to increase sustainability in food production and a positive effect on the size selectivity by additionally demonstrating a reduced capture of undersized individuals.
将食品级野生捕捞物种用作其他渔业的诱饵，对粮食生产的可持续性提出了质疑。在笼壶渔业中，诱饵是决定渔具有效性的一个重要因素。在雪蟹（）渔业中，笼子通常用鱿鱼（属）和鲱鱼（）作诱饵。这种渔业每次投放笼子都要使用大量诱饵，这构成了笼子作业的最大开支之一，与燃料成本相当。此外，依赖源自野生捕捞渔业的诱饵，对经济和环境可持续性提出了质疑，并且在诱饵的捕捞和运输过程中需要额外使用燃料，这增加了该行业的碳足迹。因此，需要使用替代诱饵来源。一种这样的替代诱饵来源可以是商业渔业加工副产品。然而，要使这种新诱饵被渔业接受，它必须具有与传统诱饵相当的捕捞效率。因此，本研究旨在比较一种新的实验性诱饵与巴伦支海雪蟹渔业中传统使用的鱿鱼诱饵的性能。结果表明，目标规格雪蟹的捕捞效率没有统计学上的显著差异。具体而言，基于嵌套自举法的形式不确定性估计表明，在渔业通常采用的浸泡时间下，目标规格个体的诱饵类型之间在效率上没有显著差异。由此可见，在粮食生产中提高可持续性具有潜力，并且通过额外减少对未达规格个体的捕捞，对尺寸选择性有积极影响。
