The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Absolutely! Dated as it is its still the benchmark for us.
Mark-
Well done.
Mark, thanks for posting this one!
"Collection fluid" usually refers to ethanol (EtOH). I recommend collecting into a solution of 90% EtOH/10% water. After an hour, or a little more, I'll drain off the solution and add more of the same concentration. I'll do this a few times until the liquid stops turning yellow. Finally, I'll put the specimens into a solution of 70% EtOH/30% water. However, if I am going to try to extract DNA from the specimens (ever), I'll collect into 100% (200 proof) EtOH and continue changes, using 100% each time. This often will leave specimens brittle, and sometimes they will extrude tissue. A final resting place of 70% is the best for medium-term storage and handling. Keeping specimens in alcohol in a freezer will extend their useful "life"time.