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Flexible‐Pass‐Through Antennas for Half‐Duplex Passive Integrated Transponder Tags in Medium to Large Rivers Used to Study Size‐Selective Reservoir Passage
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2023
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Source: North American Journal of Fisheries Management (2023)
[PDF-721.42 KB]
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Journal Title:North American Journal of Fisheries Management
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Description:The use of passive integrated transponder (PIT) tags for studying fish behavior and demography in medium-large rivers is hindered by antenna designs that are susceptible to damage in those environments and low detection efficiencies. We designed a vertically oriented, flexible PIT tag antenna for half-duplex tags that is simple to construct and deploy, resilient to the dynamic river environment, retains the higher detection efficiency of pass-through antennas, and is suitable for rivers up to 30 m wide and 1.5 m deep. These “flexible-pass-through antennas” are economical to build and cost ~US$435 to $680 for a one- or two-winding antenna, respectively. We used two flexible-pass-through antennas to test for size-selective reservoir passage in juvenile steelhead Oncorhynchus mykiss (anadromous Rainbow Trout) and Rainbow Trout. We found that flexible-pass-through antennas withstood high flows and debris during a spring out-migration season and provided data to reject the hypothesis of size-selective fish passage at the Los Padres Dam and Reservoir on the Carmel River (California, USA).
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Source:North American Journal of Fisheries Management (2023)
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ISSN:0275-5947;1548-8675;
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Rights Information:CC BY-NC-ND
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Compliance:Submitted
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