7
It is not advised to turn the electrofisher very often as fishes
are shy, especially large, and will escape from big distance if they
are outside of the catching zone. You should turn the device
every 5-10 meters from last fishing place. Boating should be
silent and careful in order not to frighten fish.
In the previous paragraph you set the optimum parameters,
however, in most cases depending on special water conditions,
weather, season of the year, conductivity of water it is necessary
to correct these parameters to obtain higher efficiency and better
effects. Each species of fish has its own properties and each
species differently behave in the electric field.
Basic parameter which influences on smooth exit of fish
from water is F- frequency. Low frequency ( 45-50 Hz) makes
fish exit to the surface quick and from greater distance. . On the
contrary, higher frequency causes smoother exit of fish on the
surface. Taking into consideration this you should remember :
increasing of frequency -slows down move of the fish, while
decreasing of frequency speeds up. In the summer fish is very
quick and frequency should be increased. In cool seasons fish is
more lazy and frequency should be decreased. In the course of
electrofishing in thick water flora it is advised to lower the
frequency in order to enable the fish to overcome all barriers on
its way towards the landing net.
Usually, frequency is set once and in the course of gaining
experience and tries fisherman can adjust this value in desired
direction. Then parameters will be corrected according to
changes of water properties and other factors which influence
electrofishing.
You should also know a fact that changes in frequency
make change in level of output power of electrofisher. Therefore,
if you want keep the previous power level you should
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