Lab 3 Flashcards by Daniel Picard | Brainscape

Flashcards in Lab 3 Deck (10)

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1

When is beach seining used?

To catch small benthic fish in large numbers

2

When are backpack electroshockers used?

For streams and shallow rivers

3

When is trawling used?

Collection of more pelagic fish

4

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

10-30
haul

5

What are the four parts of a beach seine?

Float line
Webbing
Lead line
Poles

6

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

1/4
4

7

electrofishing is biased towards ______ fish.

Larger

8

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

Power unit
Transformer
Electrodes

9

Give three reasons to use electrofishing.

Sampling surveys, tagging, eliminating species.

10

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

Trawling