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6 Science Manual – Using Video Images for Fisheries Monitoring

Example use of selection matrix in Table 2.1

Scenario:

• You have a 900 mm wide Larinier fish pass which you want to monitor.

• There is mains power at the site.

• You want to know whether fish use the pass and what species use it.

• You have a budget of £4,000.

Selection matrix:

• In the first selection criteria box, read along the row for a Larinier pass of

up to 900 mm. There are three suitable systems, Systems 1, 3 and 5, but

the rest of your requirements might narrow the options down.

• The next selection criteria box refers to the power supply. All systems can

be operated from a mains power supply, so this doesn’t reduce the options.

• From the options in ‘information required’ criteria box, choose the latter

option (evidence that fish use the pass) and read across – again, all three

systems are suitable.

• You want to identify which species use the pass, so choose the relevant

row from ‘level of ID’ option and read across. Out of the original three

options, only Systems 1 and 5 will provide this information.

• You have £4,000 to spend so buy the best! System 1 is more expensive

because the lighting is better so you will obtain better images. This is the

one you want.

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Radiant DVMD1 Bedienungsanleitung Seite 14