Electrofishing for salmon is a common means of obtaining scientific data in regards to fish populations, density, and species diversity.
As this video begins, it's uncertain as to what they could be looking for in such a small area.
Veteran anglers who have seen this process up close already know that this is the time to keep your eyes glued to the water, and this video.
What an amazing sight it is when the current is turned on. It's hard to imagine so many salmon in such a small area, but there they are.
Fishery students from many different colleges and universities use this method to collect scale samples and reproductive information. These students from Sir Sandford Fleming College in Ontario, Canada are electrofishing the Credit River.
Spawning salmon are caught to obtain eggs from fertile females to be reared at local hatcheries in hopes of restocking the species.