electrofishing

Current-based fish sampling

Electrofishing is a method of catching fish by passing electric current through water, temporarily stunning them so they can be netted.

Wildlife biologists use it to survey fish populations without killing them: The team spent the morning electrofishing the stream to count trout.

The technique requires specialized equipment and training to avoid harming fish or humans.

target

trout

Freshwater game fish

  • salmonPink-fleshed migratory fish
  • bassDeep pitch or fish
  • catfishBarbeled freshwater bottom-feeder

carp · walleye · pike · minnows · sculpins · darters · suckers · sunfish · lamprey · fry

technique

boom

Loud deep sound

  • anodeOxidation electrode
  • cathodeElectrode current exits through
  • probeThorough examination or tool

generator · waveform · duty cycle · conductivity · immobilization · dip net · live well · multi-pass

survey

mark-recapture

Wildlife census technique

conservation

endangered species

Organisms facing extinction risk

critical habitat · ecosystem health

safety

rubber gloves

Waterproof hand coverings

grounding · spotter · PPE · wet conditions · emergency protocol

Opposites
fishing method/technique

electrofishingnet fishing

Harvesting aquatic life with mesh

hook and line · angling · spearfishing · trapping · trawling

fish welfare/impact

electrofishingunderwater photography

Photographing subjects beneath water

catch and release

Family

fish, fishing, electric, electricity, electronic, electrical, electronics, electrify, electron

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