Techniques Used to Monitor Crater Lake Fish

Lake Fish Acoustic Survey

Top panel shows the acoustic signature of the fish and the bottom of the lake.  The bottom panel shows the acoustic sampler used by Crater Lake.


Acoustic Survey

Gill Net Used In Crater Lake

View of a gill net in Crater Lake.


Gill Net Sampling

Rainbox trout being examined

Rainbow Trout from Crater Lake next to a measuring board.  Note the partially digested salamanders found in the trout's stomach.


Weighing, Measuring, and Stomach Content Analysis

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