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First Adult Return of Pink Salmon Tagged as Emergents with Binary‐Coded Wires
Author(s) -
Thrower F. P.,
Smoker W. W.
Publication year - 1984
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1984)113<803:farops>2.0.co;2
Subject(s) - binary number , mathematics , arithmetic
In April 1981, 9,338 emergent pink salmon Oncorhynchus gorbuscha were nose‐tagged with half‐length (0.5 × 0.25 mm) binary‐coded wires. Their adipose fins were removed and they were released unfed on May 1 from Salmon Creek Hatchery, Juneau, Alaska. Mortality during tagging was low (0.15%) and a group of 199 fish held for 2 weeks all retained tags. Seventeen adults with coded‐wire tags were recovered in August 1982. The estimate of return (0.4%) was similar to that for other local untagged stocks in 1982. This technique allows the unique identification of many groups of emergent salmonids without removal of bony fins. Received January 31, 1984 Accepted August 21, 1984