All lobsters were microtagged abdominally using a Northwest Marine Technology
handheld injector. The tags were implanted ventrally by inserting the hypodermic needle
intramuscularly into the fifth abdominal segment and allowing the ‘push’ action of the
plunger to deposit the microtag into the third segment. Care was taken to insure that the
tag was placed to the side of the abdomen, thus avoiding the central nerve chord and
blood vessel. For the smaller size group, a binocular microscope was used to insure
correct implantation. The 1.5 month juveniles were tagged with 0.5 mm, and the 7
month juveniles with 1 mm microtags. After each moult, the juveniles were examined
with the aid of a binocular microscope for tag retention and migration.