Erilised püügiviisid
When
combined with water chemistry, habitat, and stream invertebrate information, a clear picture of the
ecological system is brought in to focus from which sound management decisions can be made.
8.1 Introduction
· Electrofishing
- use of
electricity to:
capture fish
guide fish
block the
movement of
fish
Elektripüük öösel
http://www.fisheries.org/units/education/fisheries_techniques/Chapter8/Night%20boat%20electrofishing
%20unit.jpg
Fish in an Electrical Field
· Behavior change or
reactive movement
· Trauma from
Stress due to
physiology
Injury due to
mechanical
tissue damage
Fish in an Electric Field
(cont.)
· Low AC - fish lines up perpendicular to
flux line
·
· - +
·
·
· High AC - muscle contraction and tetany
Injuries to Fish
annaabi.ee 
