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Visible Implant Tag Retention by and Effects on Condition of a Stream Population of Brook Trout
Author(s) -
Bryan Roger D.,
Ney John J.
Publication year - 1994
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(1994)014<0216:vitrba>2.3.co;2
Subject(s) - trout , fontinalis , salvelinus , zoology , fishery , biology , population , fish <actinopterygii> , demography , sociology
Wild brook trout Savelinus fontinalis in the Hazel River, Shenandoah National Park, Virginia, were marked with individually labeled visible implant tags, fin‐clipped, and recaptured at intervals over the following year. Tags remained legible over the entire period. Overall tag retention was 65%. Tag retention rates were only about 50% for brook trout 130—160 mm in total length (TL) but rose to 100% for brook trout 200 mm TL or greater. The magnitude of decline in the recapture percentage for brook trout that retained tags is consistent with reported mortality rates for southern Appalachian brook trout populations. Total length and condition of tagged and untagged adult brook trout did not differ significantly in August, October, and May collections.