🚀 go-pugleaf

Dear Andrew:

I am currently using a fluorescent fluid to mark juvenile coho salmon.
The fluid is a suspension of microscopic coloured spheres. This dye
is injected at high pressure in the fins of the fish (preferably dorsal,
anal or caudal, although I imagine that it would work on the adipose fin
as well) using a modified massive innoculation gun. The gun is powered
with compressed CO2.
If enough dye is properly injected the marks are still visible
(in my experience) 18 months later (especially using UV light)
and (in theory) one should be able to see them many years down the
road.
If this sounds like what you or/and yur friend are looking for
feel free to contact me at:

giannico@zoology.ubc.ca

and I will be able to tell you more a bout the pros and cons
of the equipment we use.

Good luck!


Guillermo Giannico
Westwater Research Unit
The University of British Columbia
Vancouver, British Columbia
Canada.