Alternative Methods
The results of automatic fish counters can be supplemented, confirmed, or replaced by a number of alternative techniques, varying in accuracy, cost, complexity, and skew effects.
- Electrofishing
- Traps
- Net and rod counts
- Redd counts (disturbances in gravel caused by mating activities of some fish)
- Closed circuit television
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Famous quotes containing the words alternative and/or methods:
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