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Factors affecting detection probability and range of transmitters and receivers designed for the Juvenile Salmon Acoustic Telemetry System
Environmental Biology of Fishes ( IF 1.4 ) Pub Date : 2020-05-01 , DOI: 10.1007/s10641-020-00987-4
Arnold J. Ammann

Acoustic telemetry allows collection of data on the movement and survival of fish and other aquatic organisms. The passive form of this technology uses transmitters (tags) and fixed receivers to record when an organism is present at a given location. Understanding and interpretation of these data depends on knowledge of the detection range and detection probability of the receivers. This study examines factors affecting performance of tags and receivers designed for the Juvenile Salmon Acoustic Telemetry System (JSATS) at a location in the Sacramento River in CA, USA. A group of tags ( n = 13) of two power output levels, each transmitting a unique code at five second intervals, were manually moved past a set of two fixed receivers in upstream and downstream directions along transects of different distances from the receivers at two different speeds. The factors that significantly affected detection probability were tag orientation and tag movement direction. Tag orientation had the largest effect on detection probability, with higher detection rates when the tag’s piezoelectric transducer was directed towards the receiver. Detection probability (proportion of transmissions detected) was 30–50% out to 160 m. Detection efficiency (proportion of tags regarded as present) was 99–100% when tags passed within 25 m and 84–96% within 135 m of a receiver. These results have implications for the design and interpretation of acoustic tracking studies and the orientation of transmitters when implanted into fish.

中文翻译:

影响为幼年鲑鱼声学遥测系统设计的发射器和接收器的检测概率和范围的因素

声学遥测允许收集有关鱼类和其他水生生物的运动和生存的数据。该技术的被动形式使用发射器(标签)和固定接收器来记录生物体何时出现在给定位置。对这些数据的理解和解释取决于对接收器检测范围和检测概率的了解。本研究调查了影响美国加利福尼亚州萨克拉门托河某处为幼年鲑鱼声学遥测系统 (JSATS) 设计的标签和接收器性能的因素。一组具有两个功率输出电平的标签 (n = 13),每个标签以 5 秒的间隔发送一个唯一代码,以两种不同的速度沿着距接收器不同距离的横断面,在上游和下游方向上手动移动通过一组两个固定接收器。显着影响检测概率的因素是标签方向和标签移动方向。标签方向对检测概率的影响最大,当标签的压电换能器指向接收器时,检测率更高。检测概率(检测到的传输比例)在 160 m 范围内为 30-50%。当标签在接收器 25 m 内通过时,检测效率(被视为存在的标签比例)为 99–100%,在接收器 135 m 内通过时为 84–96%。这些结果对声学跟踪研究的设计和解释以及植入鱼体内的发射器的方向都有影响。显着影响检测概率的因素是标签方向和标签移动方向。标签方向对检测概率的影响最大,当标签的压电换能器指向接收器时,检测率更高。检测概率(检测到的传输比例)在 160 m 范围内为 30-50%。当标签在接收器 25 m 内通过时,检测效率(被视为存在的标签比例)为 99–100%,在接收器 135 m 内通过时为 84–96%。这些结果对声学跟踪研究的设计和解释以及植入鱼体内的发射器的方向都有影响。显着影响检测概率的因素是标签方向和标签移动方向。标签方向对检测概率的影响最大,当标签的压电换能器指向接收器时,检测率更高。检测概率(检测到的传输比例)在 160 m 范围内为 30-50%。当标签在接收器 25 m 内通过时,检测效率(被视为存在的标签比例)为 99–100%,在接收器 135 m 内通过时为 84–96%。这些结果对声学跟踪研究的设计和解释以及植入鱼体内的发射器的方向都有影响。当标签的压电换能器指向接收器时具有更高的检测率。检测概率(检测到的传输比例)在 160 m 范围内为 30-50%。当标签在接收器 25 m 内通过时,检测效率(被视为存在的标签比例)为 99–100%,在接收器 135 m 内通过时为 84–96%。这些结果对声学跟踪研究的设计和解释以及植入鱼体内的发射器的方向都有影响。当标签的压电换能器指向接收器时具有更高的检测率。检测概率(检测到的传输比例)在 160 m 范围内为 30-50%。当标签在接收器 25 m 内通过时,检测效率(被视为存在的标签比例)为 99–100%,在接收器 135 m 内通过时为 84–96%。这些结果对声学跟踪研究的设计和解释以及植入鱼体内的发射器的方向都有影响。
更新日期:2020-05-01
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