The canula, or applicator, for the large dart tags have changed a little in their design, hopefully for the better. The canula is still made from stainless steel hypodermal tubing and the angle of the point is the same, but the difference is in the notch where the tag inserts. The newer notch restricts the dart arm movement and allows the tagger to know exactly the position of the dart arm. If you are using the new canulas, let us know how they are working for you. The small darts use a canula without a notch.
Location is an important bit of data.
This is the information used to determine how far a fish has traveled during a specific amount of time. With several recaptures of the same species during similar times, a trend is developed showing possible routes the fish may follow. Sometimes it is not. And then there are some fish that never move, or appear not to move much. The complete data collected on a particular fish includes two points of location, one location for release and one location for recapture.