Tools for monitoring fish species
Scientists monitor fish to calculate how many there are.
There are two common methods for monitoring the number of fish in and outside of reserves.
Baited underwater video
Baited underwater video
Collects deep water footage.
Show how fish act naturally.
Good for shy or rare species.
Only attracts fish that like bait.
Takes time to watch the footage.
Scuba diving
Scuba diving
Scuba divers can scare and attract different fish, which can affect the numbers captured.
Limited to diving depths and also the length of time underwater.
Good for detailed study.
Can move to different places.
