Lab 3

Question 1

When is beach seining used?

Answer 1

To catch small benthic fish in large numbers

Question 2

When are backpack electroshockers used?

Answer 2

For streams and shallow rivers

Question 3

When is trawling used?

Answer 3

Collection of more pelagic fish

Question 4

Beach seining uses a small seine - feet long. Beach seines are sometimes called ______ seines.

Answer 4

10-30

haul

Question 5

What are the four parts of a beach seine?

Answer 5

Float line
Webbing
Lead line
Poles

Question 6

Minnow seines have a ___-inch mesh. A __ foot depth is sufficient for minnow seines.

Answer 6

1/4

4

Question 7

electrofishing is biased towards ______ fish.

Answer 7

Larger

Question 8

What are the three main pieces of gear used during electrofishing?

Answer 8

Power unit
Transformer
Electrodes

Question 9

Give three reasons to use electrofishing.

Answer 9

Sampling surveys, tagging, eliminating species.

Question 10

Which of the three techniques is more common for fish harvesting?

Answer 10

Trawling