Factors affecting short-term post-release survival probability of Lake Trout implanted with acoustic telemetry transmitters

IF 2.3 2区 农林科学 Q2 FISHERIES
Alexander J. Gatch , Dimitry Gorsky , Kyle T. Morton , R. Josephine Johnson , Collin J. Farrell , Timothy B. Johnson , Emma J. Bloomfield , Brent Metcalfe , Jessica Goretzke , Michael Connerton , Sarah M. Larocque , Jonathan D. Midwood , Brian O’Malley , Brian Weidel , Steven J. Cooke , Stacy Furgal
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引用次数: 0

Abstract

The use of acoustic telemetry is steadily expanding to help answer questions related to habitat use, movement, and behavior of fishes. Significant time and resources are invested to start acoustic telemetry studies; therefore, careful planning is needed to limit post-release mortality of tagged individuals. Deep, cold-water species present additional challenges to acoustic tagging because of changes in temperature and pressure experienced during capture. The objective of our study was to determine if capture method, surface water temperature, water depth, or fish size influenced short-term post-release survival of a deep, cold-water species, Lake Trout Salvelinus namaycush. In 2023, 299 Lake Trout were captured with angling or gillnets across Lake Ontario (Laurentian Great Lake – U.S. & CAN) and surgically implanted with acoustic transmitters. We estimated 30-day post-release mortality and 24-h post-release distance traveled for tagged Lake Trout. We used Cox proportional hazards models to identify factors affecting survival probability and multiple linear regression to identify factors affecting post-release distance traveled. Thirty-day post-release mortality was minimal (9.03 %, 27/299 Lake Trout); however, mortality was 6.37 times more likely for Lake Trout captured in gillnets compare to angling (p = 0.003). Lake Trout length had a marginally significant effect on mortality (p = 0.052) but capture depth and temperature did not (p > 0.05). Lake Trout post-release distance traveled was not significantly influenced by capture gear, depth, temperature, or Lake Trout length (p = 0.61). Our results indicate that tagging-induced post-release mortality is minimal for Lake Trout tagged in the spring, but survival can be increased by avoiding use of gillnets.
影响水声遥测发射机植入湖鳟放生后短期存活率的因素
声波遥测技术的使用正在稳步扩大,以帮助回答有关鱼类栖息地使用、运动和行为的问题。投入大量时间和资源开展声波遥测研究;因此,需要仔细规划以限制被标记个体释放后的死亡率。由于捕获过程中温度和压力的变化,深水、冷水物种对声学标记提出了额外的挑战。本研究的目的是确定捕获方法、地表水温度、水深或鱼的大小是否会影响深海、冷水物种湖鳟鱼(Salvelinus namaycush)释放后的短期生存。2023年,在安大略湖(美国劳伦森大湖),用钓鱼或刺网捕获了299条湖鳟鱼。CAN),并通过手术植入声波发射器。我们估计了被标记的湖鳟鱼放生后30天的死亡率和放生后24小时的旅行距离。我们使用Cox比例风险模型来确定影响生存概率的因素,并使用多元线性回归来确定影响释放后旅行距离的因素。放生后30天死亡率最低(9.03 %,27/299 Lake Trout);然而,与钓鱼相比,刺网捕获的湖鳟鱼死亡率高6.37倍(p = 0.003)。湖鳟长度对死亡率有显著影响(p = 0.052),而捕获深度和温度对死亡率无显著影响(p >; 0.05)。捕获装置、深度、温度或湖鳟鱼长度对湖鳟鱼的释放距离没有显著影响(p = 0.61)。我们的研究结果表明,春季被标记的湖鳟鱼释放后的死亡率最低,但避免使用刺网可以提高存活率。
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来源期刊
Fisheries Research
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.
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