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Table 1 Mean total length, percent survival, and percent retention of 12-mm PIT tags after 41–118 day for metamorphosing juvenile sea lamprey from the Fort River, MA and two Lake Champlain tributaries

From: Assessment of PIT tag retention and post-tagging survival in metamorphosing juvenile sea lamprey

Source/group n Tagging/monitoring date Total days monitored Total length (mm) Survival (%) Tag retention (%)
Mean Range 24 h Overall 24 h Overall (# of days tagged)
Untagged
Fort River Group 1 23 November 19, 2013 64 142.9 125–167 100 100.0 N/A N/A
Fort River Group 2 15 December 6, 2013 47 145.5 134–156 100 100.0 N/A N/A
Lake Champlain 120 December 6, 2013 60 * * 100 94.2 N/A N/A
Tagged
Fort River Group 1 20 November 19, 2013 118 147.4 129–176 100 90.0 100 100.0 (105)
Fort River Group 2 20 December 6, 2013 101 148.0 135–168 100 85.0 100 100.0 (88)
Lake Champlain 110 February 4, 2014 41 167.8 139–205 100 94.5 100 98.2 (28)
Total tagged 150 N/A N/A 162.4 129–205 100 92.7 100 98.6 (–)
  1. Percent tag retention of all surviving lamprey was evaluated on March 4, 2014. Lake Champlain tagged and untagged sea lamprey consisted of one group monitored for 60 day pre-tagging (*), then tagged and monitored for 41 day post-tagging