Hello,

Getting an idea of the exact population size of fish in rivers is important
for a lot of things. But how do you to this? We use the 'removal-trapping'
method ( multiple electrofishing in 100m of river). But this gives only an
idea of a small portion of the river. How do you get an idea of the
population-size in the whole river?

Greetings,

Guy Knaepkens

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