Great technical post.

FYI- a "mho" is a measure of conductance. the complete opposite is an "ohm" which is a measure of resistance. It is no coincidence that they are spelled backwards or opposite of each other.

Another FYI- Theorists in the electrofishing world suggest that for an electrofishing sample to be comparable from year to year (on a given water body), the conductivity must also be consistent. This is not always the case, though. It is an inherent variability in the sampling protocol. Assume time of year and temperature were the same for two samples in two different years onthe same lake. Now suppose catch in year two was significantly lower. Did the fish population crash due to environmental or angling pressures? Perhaps. Or perhaps it was because the conductivity of the water changed drastically over the course of the year making your electrofishing gear less effective (in this case, but it could be more effective). So you measure conductivity. In the real world, you still take the electrofisihng sample no matter the results of the conductivity readings. We operate on time schedules so we have to do the work. However, all fishery biologists should be cognizant of the conductivity issue, especially when monitoring fish populations over time.


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"Imagination is more important than knowledge" Albert Einstein