Lines snag spines! A field test of recreational angling gear ensnarement of Bythotrephes

IF 1.1 4区环境科学与生态学 Q4 LIMNOLOGY

Lake and Reservoir Management Pub Date : 2021-08-09 DOI:10.1080/10402381.2021.1941447

D. Branstrator, J. Dumke, V. Brady, Holly A. Wellard Kelly

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引用次数: 0

Abstract

Abstract Branstrator DK, Dumke JD, Brady VJ, Wellard Kelly HA. 2021. Lines snag spines! A field test of recreational angling gear ensnarement of Bythotrephes. Lake Reserv Manage. 37:391–405. Recreational angling gear is a high-risk pathway of dispersal for the invasive spiny water flea (Bythotrephes cederströmii). We measured the number of Bythotrephes individuals ensnared on trolled shallow angling lines (3 line materials), a trolled downrigger angling line, a trolled downrigger steel cable, a trolled simulated livewell, a trolled bait bucket, and stationary anchor ropes (3 rope materials) in 2 Minnesota (United States) lakes. The shallow angling lines and the downrigger angling line had the greatest mean ensnarement rates (number of Bythotrephes individuals ensnared/transect transit), followed by the downrigger cable and the livewell, followed by the bait bucket and the anchor ropes. Added together, the shallow angling lines (as a mean of the 3 line materials) and the downrigger angling line accounted for 87–88% of the mean total ensnarement rate. Among the shallow angling lines, monofilament and fluorocarbon lines had greater mean ensnarement rates than braided line but the distinction was only statistically significant in one of the 2 lakes. The ensnarement rate of all angling gear combined was positively related to the density of Bythotrephes in the water column at the time of study (ambient density). On the downrigger angling line (monofilament), instar-3 Bythotrephes were ensnared at a relative frequency disproportionately greater than ambient density would predict, while instar-1 Bythotrephes were ensnared at a relative frequency disproportionately less than ambient density would predict. Our results suggest that education and outreach messaging should include instructions on removing Bythotrephes from angling lines in addition to the reminder to drain all water.

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线钩住脊椎！Bythotrephs休闲钓鱼装置诱捕现场试验

摘要：Branstrator DK，Dumke JD，Brady VJ，Wellard Kelly HA。2021。线钩住脊椎！一项野外试验的休闲钓鱼设备诱捕的Bythotrephs。湖泊保护区管理。37:391–405.休闲钓鱼装备是入侵刺水蚤（Bythotrephs cederströmii）传播的高风险途径。我们测量了被困在控制的浅钓鱼线上的Bythotrephs个体的数量（3 在明尼苏达州（美国）的两个湖泊中，绳索材料）、受控下索具钓鱼线、受控下吊索钢索、受控模拟活井、受控诱饵桶和固定锚绳（3种绳索材料）。浅钓鱼线和下索钓鱼线的平均诱捕率最高（被诱捕/横断面运输的Bythotrephs个体数量），其次是下索缆和活井，其次是诱饵桶和锚索。加在一起，浅倾斜线（作为3 线材料）和下索具倾斜线占平均总诱捕率的87–88%。在浅钓鱼线中，单丝和氟碳线的平均诱捕率高于编织线，但这一差异仅在两个湖泊中的一个湖泊中具有统计学意义。所有斜齿轮组合的诱捕率与研究时水柱中Bythotrephs的密度（环境密度）呈正相关。在下索具倾斜线（单丝）上，3龄Bythotrephs被诱捕的相对频率不成比例地高于环境密度预测的相对频率，而1龄BythoTrephs被捕捉的相对频率则不成比例地低于环境密度预测。我们的研究结果表明，除了提醒排水外，教育和外联信息还应包括关于将Bythotrephes从钓鱼线上移除的说明。

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来源期刊

Lake and Reservoir Management 环境科学-海洋与淡水生物学

自引率

6.70%

发文量

期刊介绍： Lake and Reservoir Management (LRM) publishes original, previously unpublished studies relevant to lake and reservoir management. Papers address the management of lakes and reservoirs, their watersheds and tributaries, along with the limnology and ecology needed for sound management of these systems. Case studies that advance the science of lake management or confirm important management concepts are appropriate as long as there is clearly described management significance. Papers on economic, social, regulatory and policy aspects of lake management are also welcome with appropriate supporting data and management implications. Literature syntheses and papers developing a conceptual foundation of lake and watershed ecology will be considered for publication, but there needs to be clear emphasis on management implications. Modeling papers will be considered where the model is properly verified but it is also highly preferable that management based on the model has been taken and results have been documented. Application of known models to yet another system without a clear advance in resultant management are unlikely to be accepted. Shorter notes that convey important early results of long-term studies or provide data relating to causative agents or management approaches that warrant further study are acceptable even if the story is not yet complete. All submissions are subject to peer review to assure relevance and reliability for management application.