Assessing the potential of bait reuse in a large-scale SMART drumline program

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2024-09-19 DOI:10.1016/j.fishres.2024.107176

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引用次数: 0

Abstract

Bait quality is an important characteristic that can influence the catchability of target species and contribute to sustainable fishing practices. We used bioelectrical impedance analysis (BIA) to assess the impact of various handling treatments on the quality of sea mullet (Mugil cephalus); a commonly used bait on SMART (shark-management-alert-in-real-time) drumlines in the New South Wales (NSW, Australia) shark management program. Specifically, we focused on the consequences of reusing sea mullet as drumline bait to improve the cost-effectiveness of a program incorporating 305 drumlines and spanning ∼1200 km of the east coast of Australia. After being deployed in seawater for 10 hours at 15°C, 20°C and 25°C temperatures in a flow-through mesocosm aquarium, sea mullet underwent brining, freezing, and ice storage treatments. Electrical impedance (comprised of resistance and reactance) was used as a bait quality indicator. Brining improved bait quality by reducing impedance, ice storage indicated potential quality declines while frozen baits remained stable. Resistance and reactance values of iced fish significantly increased with increasing temperature. Freezing baits showed considerable variation among resistance and reactance values. The results indicate that sea mullet could possibly be reused as bait. However, these reuse procedures now need to be tested in field trials to assess for any changes in the catchability of target sharks relative to fresh bait. We also demonstrate the utility of BIA for rapid, non-destructive assessment of bait quality.

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评估大规模 SMART 鼓绳项目中饵料再利用的潜力

饵料质量是影响目标鱼种可捕性的一个重要特征，有助于可持续渔业实践。我们使用生物电阻抗分析（BIA）评估了各种处理方法对鲻鱼（Mugil cephalus）质量的影响；鲻鱼是新南威尔士州（澳大利亚新南威尔士州）鲨鱼管理计划中SMART（实时鲨鱼管理）渔鼓线的常用饵料。具体来说，我们重点研究了重新使用鲻鱼作为渔鼓线饵料的后果，以提高该计划的成本效益，该计划包括 305 条渔鼓线，横跨澳大利亚东海岸 1200 公里。鲻鱼在温度分别为 15°C、20°C 和 25°C 的海水中放置 10 个小时后，在流动的中观水族箱中进行盐渍、冷冻和冰藏处理。电阻抗（由电阻和电抗组成）被用作饵料质量指标。盐渍可通过降低阻抗改善饵料质量，冰冻则表明饵料质量可能会下降，而冷冻饵料则保持稳定。随着温度的升高，冰冻鱼的电阻值和电抗值明显增加。冷冻饵料的阻抗和反应值变化很大。结果表明，鲻鱼有可能作为鱼饵重复使用。但是，这些重复使用程序现在需要在现场试验中进行测试，以评估与新鲜饵料相比，目标鲨鱼的可捕获性是否有任何变化。我们还证明了 BIA 在快速、非破坏性评估饵料质量方面的实用性。

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来源期刊

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.