Reference | Bergstedt, R. A., W. D. Swink, and J. G. Seelye. 1993. Evaluation of two locations for Coded Wire Tags in larval and small parasitic-phase sea lampreys. North American Journal of Fisheries Management 13:609-612. |
Abstract | Coded wire tags were injected into the dorsal musculature near the insertion of the dorsal fin (dorsal location) and subcutaneously along the ventral midline posterior to the anus (ventral location) of larval and small parasitic-phase sea lampreys Petromyzon marinus. In larvae, tag loss after 1 year was significantly higher (P<0.01) from the ventral location (18%) than from the dorsal location (1%). Although only 14 tagged larvae metamorphosed during the study, the process did not seem to increase tag loss. Mortality of larvae tagged in either site did not differ from controls (P>0.57). Parasitic-phase sea lampreys lost no tags from either site through 99 d after tagging. Mortality was high in all parasitic-phase groups, including controls, but did not seem to be related to the presence of Coded Wire Tags. To simplify later tag recovery from adults, we recommend that all life stages of sea lampreys be tagged in the dorsal musculature near the insertion of the dorsal fin. |
Tag | Coded Wire Tag (CWT) |
Objective | Evaluate tags |