Journal
TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY
Volume 136, Issue 3, Pages 562-566Publisher
AMER FISHERIES SOC
DOI: 10.1577/T06-084.1
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We present a new, low-cost, low-power, half/full-duplex passive integrated transponder (PIT) tag interrogation antenna for use in detecting fish movements in small streams. New technology by Allflex-USA allowed us to develop a reading system with an antenna 279.4 cm wide x 60.9 cm high that reads both common tag types used in fisheries today for about US$1,000. An instream antenna of this size and price makes high-resolution tracking of fish movement in small streams feasible where cost and tag-type restrictions were prohibitive. For evaluation, we placed the antenna upstream of a small estuary on the central California coast to observe the diel movements of juvenile steelhead Oncorhynchus mykiss between the estuary and upstream habitats in both spring and fall months.
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