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Efficiency of portable antennas for detecting passive integrated transponder tags in stream-dwelling salmonids

February 22, 2016

Portable antennas have become an increasingly common technique for tracking fish marked with passive integrated transponder (PIT) tags. We used logistic regression to evaluate how species, fish length, and physical habitat characteristics influence portable antenna detection efficiency in stream-dwelling brown trout (Salmo trutta), bull trout (Salvelinus confluentus), and redband trout (Oncorhynchus mykiss newberrii) marked with 12-mm PIT tags. We redetected 56% (20/36) of brown trout, 34% (68/202) of bull trout, and 33% (20/61) of redband trout after a recovery period of 21 to 46 hours. Models indicate support for length and species and minor support for percent boulder, large woody debris, and percent cobble as parameters important for describing variation in detection efficiency, although 95% confidence intervals for estimates were large. The odds of detecting brown trout (1.5 ± 2.2 [mean ± SE]) are approximately four times as high as bull trout (0.4 ± 1.6) or redband trout (0.3 ± 1.8) and species-specific differences may be related to length. Our reported detection efficiency for brown trout falls within the range of other studies, but is the first reported for bull trout and redband trout. Portable antennas may be a relatively unbiased way of redetecting varying sizes of all three salmonid species.

Citation Information

Publication Year 2016
Title Efficiency of portable antennas for detecting passive integrated transponder tags in stream-dwelling salmonids
DOI 10.1371/journal.pone.0149898
Authors Nolan P. Banish, Summer M. Burdick, Katherine R. Moyer
Publication Type Article
Publication Subtype Journal Article
Series Title PLoS ONE
Series Number
Index ID 70170108
Record Source USGS Publications Warehouse
USGS Organization Western Fisheries Research Center