O.K. where to start. First of all if you have any issues with
encountering T and E spp. I would simply recommend seining. While they
can be successfully shocked without mortality, it's tricky (plus FWS
really frowns on it). this is not the type of thing I would recomend
over an email.
In streams with conductivity of say 100, if I am targeting darters I
usually shock-in-a voltage of 400 (settings J-4, to start and tweak
there after, check the smith-root charts for specific info). Personally
I pay a good bit of attention to the amps. I can shock these fish
without mortailty issues-in-around 0.25-0.30.
Currently I am working in streams where conductivity rarely exceeds 20.
If you follow the handy dandy smit-root chart you would be using
800-1000 volts. This is silly, in my opinion. I can effectively
collect fish with minimal mortality-in-600, again tweaking the setting
to my liking. Yesterday I think I was on L-6 for example. Again paying
the bulk of my attention to to amps., staying under 0.32 if-in-all
possible.
These issues change with depth of course.
I don't know what your objective is, but in my work I am not as
interested in standardizing effort as much as I am in getting the
fish.....
Perhaps a little more information regarding your objective might help.
John R. Knight
Blackwater et. al FL
>>> ashtonmj2003-in-yahoo.com 04/06/05 11:49 AM >>>
I am currently doing a big literature search today for specific levels
of frequency, voltage, wattage, cycle, etc. for shocking darters.
Problem is so few papers actually state exactly what they used other
than the blanket statement of the type of equipment they used and the
method. If anyone has any specific settings they use with a certain
model in certain conditions (conductivity) on darters I would greatly
appreciate the information.
Matt
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