Electrofishing

Question 1

Conductivity

Answer 1

Measure of a material’s ability to pass electric current.

(Adams et al, 2012)

Question 2

Electrofishing

Answer 2

The use of electricity to cause fish’s muscles to contract in an involuntary response in order to capture them.

(Reynolds & Kolz, 2012)

Question 3

Forced Swimming

Answer 3

Unbalanced swimming or other movements or balanced swimming towards anode.

(Reynolds & Kolz, 2012)

Question 4

How can e-fishing negatively impact a fish?

Answer 4

Spinal injury
Stress
Cardiac arrest
More vulnerable to predation
Less able to feed
Bruises
Respiratory failure
Mortality

(Reynolds & Kolz, 2012)

Question 5

How does e-fishing differ between smaller and larger fish?

Answer 5

Smaller fish more likely to suffer stress-related death as they don’t have enough energy reserves to recover.

Larger fish are more likely to get injured because their muscle contractions are usually more severe.

(Reynolds & Kolz, 2012)

Question 6

What biases might exist in e-fishing?

Answer 6

E-fishing is most effective in shallow water so habitat preference among species will affect how likely they are to be captured.

Larger species more likely to be captured because they are easier to see and their larger body size makes them more susceptible to the electric field.

Fish with finer scales also easier to capture.

(Reynolds & Kolz, 2012)