Effectiveness of Floy FTF-69 fingerling tags and two types of internal body cavity tags was compared. Tag loss groups of internally tagged fish was not significantly different after 16.5 weeks. Tag retention was 100% in a test group having yellow internal tags, and 94.3% for a group supplied with blue tags having metal inserts. Floy fingerling tagged fish also retained 94.3% of their tags. No mortalities occurred as a result of tag application in any of the test groups. Final lengths and weights were significantly different (P <.05) between the Floy fingerling and blue metal tagged fish. General observations upon tag recovery revealed a high incidence (71%) of inflammation surrounding the Floy fingerling tag site. Wounds from the internal body cavity tag injections healed without complications.
Blann, Vicki, Tsumura, Kanji. 1988. A Comparison of Floy Fingerling and Internal Tags Used in Marking Rainbow Trout (Salmo gairdneri). Ministry of Environment, Lands and Parks. Fisheries Project Report. FPR5