Well you could look in to the PIT tag they are using for salmonids
returning through hydro-power producing dams. There are very small, one
roll of wire provides the same number to all specimens and are placed in
3"-5" smolts headed for sea.
On Wed, 9 Aug 1995, Vincent Egan wrote:
Julian Humphries wrote:
->I checked into this technology, too, its call PIT (passive
->interogative transitors).
I thought PIT stood for Passive Implantable Transponder. PIT tags
have been used quite extensively in mark-recapture studies and to
identify captive animals. As far as I know, they are supplied with
a unique number - I don't know about the feasibility/cost involved in
getting a particular institution's own coding system encoded though.
These tags wouldn't really be suitable for small specimens - they are
cylindrical and about 2.5 cm in length.