Fisheries Surveys Comparison

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1. Summary comparison table[edit]

Technique Cost 1-5 (low-high) Complexity 1-5 (low-high) Monitor ecological continuity Demonstrate habitat use Data on unpassable obstacles
Electrofishing 3 2 Somewhat Yes Yes
Snorkeling 1 2 Somewhat Yes No
Weir trap 5 3 Yes No No
Gill net 1 2 No No No
Seine net 1 2 Yes Not entirely No
Fyke net 1 1 Yes Somewhat No
Trawl net 4 2 No Somewhat No
Anglers citizen science 1 2 Somewhat Not entirely No
Video counting systems 5 5 Yes No No
Underwater viewing room 5 3 Yes No No
Resistivity counter 3 5 Yes No No
Infrared counter 3 3 Yes No Migrating fish
Acoustic camera 5 3 Yes Yes Yes
Coded Wire and Visible Implant Tag 1 1 Somewhat No No
RFID PIT-tag 2 4 Yes Yes Yes
Radio telemetary 4 5 Yes Yes Yes
Acoustic telemetary 5 5 Yes Yes Yes
Genetic with micro-satellites 3 1 Yes No Yes
eDNA 3 3 Yes No Migrating fish
Otolith micro-chemistry 3 5 Yes No No
Bottom sampler 1 1 Yes Young lamprey No
Flottang 1 1 Yes Young eels Yes
Redd counting 1 1 Yes Spawning habitat Yes


2. Data comparison table[edit]

Technique Species richness data Abundance data Species ID Uniquely identify fish Migration behaviour Local fish behaviour Actively track fish Auto detect & measure Monitor smaller fish
Electrofishing Yes Yes Yes No No No No No Yes
Snorkeling Not entirely Yes Yes No No Yes No No Yes but biased
Weir trap Not entirely Migrating fish Yes No Yes No No No Somewhat
Gill net Not entirely No Yes No Limited Limited No No If mesh adapted
Seine net Not entirely Yes Yes No Limited Limited No No If mesh adapted
Fyke net Not entirely Migrating fish Yes No Limited Limited No No If mesh adapted
Trawl net Not entirely Not entirely Yes No No No No No If mesh adapted
Anglers citizen science Not entirely Limited Yes No No Somewhat No No Depends
Video counting systems Not entirely Migrating fish Yes No Yes No No Yes but not all Somewhat
Underwater viewing room Not entirely Migrating fish Yes No Yes No No Somewhat Somewhat
Resistivity counter Not entirely Migrating fish Yes No Yes No No Yes Yes
Infrared counter Not entirely Migrating fish Yes No Yes No No Yes Somewhat
Acoustic camera Not entirely Somewhat Migrating Fish Not all No Yes Yes Yes Not auto Yes
Coded Wire and Visible Implant Tag No If recaptured Not entirely Yes Yes No No No Yes
RFID PIT-tag Not entirely If all fish tagged Not entirely Yes Yes Yes Yes No Yes
Radio telemetary No No Yes Yes Yes Yes Yes No Limited
Acoustic telemetary No No Not entirely Yes Yes Yes Yes No Limited
Genetic with micro-satellites No Yes Yes No No No No No Yes
eDNA Yes Limited Yes No Yes No No No No
Otolith micro-chemistry No No Yes Yes No No No No Yes
Bottom sampler No Young lamprey Lamprey only No No No No No Lamprey only
Flottang No No Eels only No Eels only No No No Eels only
Redd counting No Yes but not all No No No No No No No


3. Limitation comparison table[edit]

Technique Requires a narrow opening to channel fish Requires fish handling Requires tagging Sensitive to stream turbulence and water bubbles Sensitive to flowing debris and leaves Works in turbid water Requires natural light or lighting Works in deep water Works in brackish or saltwater Can be solar powered
Electrofishing No Yes No No No No Yes < 2m No No
Snorkeling No No No Yes No No Yes No Yes n/a
Weir trap Yes Yes No Yes Yes Yes No No Yes No
Gill net No Yes (lethal) No Yes Yes Yes No Yes Yes n/a
Seine net No Yes No Yes Yes Yes No Yes Yes n/a
Fyke net No Yes No No Yes Yes No Yes Yes n/a
Trawl net No Yes No No Yes Yes No Yes Yes n/a
Anglers citizen science No Yes No No Yes Yes No Yes Yes n/a
Video counting systems Yes No No Yes Yes Limited Yes No Yes Yes
Underwater viewing room Yes No No Yes Yes Somewhat Yes No Yes Probably
Resistivity counter Yes No No ? Yes Yes No No Yes Probably
Infrared counter Yes No No Yes Yes Yes No No Yes Probably
Acoustic camera No No No Yes Yes Yes No Yes Yes Yes
Coded Wire and Visible Implant Tag No Yes Yes No No Yes No Yes Yes n/a
RFID PIT-tag No Yes Yes ? No Yes No No Limited Yes
Radio telemetary No Yes Yes Somewhat No Yes No Somewhat No Yes
Acoustic telemetary No Yes Yes Yes No Yes No Yes Yes Yes
Genetic with micro-satellites No Yes No No No Yes No Yes Yes No
eDNA No No No No No Yes No Yes Yes n/a
Otolith micro-chemistry No Yes (lethal) No No No Yes No Yes Yes No
Bottom sampler No Yes No Yes No Yes No No No n/a
Flottang No Yes No No No Yes No No Yes n/a
Redd counting No No No No No No Yes No No n/a


4. Table explanations[edit]

  • n/a = Not applicable
  • Costs and complexity are on a 1-5 scale to enable sorting. 1=low and 5=high in both cases.