Retention of Visible Implant Tags in Lake Trout and Atlantic Salmon
- 1 July 1992
- journal article
- Published by Oxford University Press (OUP) in The Progressive Fish-Culturist
- Vol. 54 (3) , 163-170
- https://doi.org/10.1577/1548-8640(1992)054<0163:roviti>2.3.co;2
Abstract
Retention and readability of visible implant (VI) tags were evaluated in adult (2-yearold) Atlantic salmon (Salmo salar), adult (4-year-old) lake trout (Salvelinus namaycush), and yearling (10-month-old) fish of both species. Tags were implanted in adipose eyelid tissue posterior to the eye. After 10 months, retention in yearlings was 49% by Atlantic salmon and 41% by lake trout. In adults, retention was 84% by Atlantic salmon and 45% by lake trout. Tag retention in yearling Atlantic salmon increased with fish weight at tagging; tag retention, by weight-groups, was 0% for fish that weighed 20 g or less; 46% for 21–40-g fish; and 71% for 41–99-g fish. Tag retention in adults of Atlantic salmon and lake trout was not related to fish weight. After 10 months, the percentage of readable tags was 100% in yearling Atlantic salmon and 82% in adult Atlantic salmon, and 0% in yearling lake trout and 77% in adult lake trout. None of the tags in yearling lake trout were readable 294 d after implant, because ...Keywords
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