Case study: Counting, sizing and tracking Chinook salmon in the Kenai River, Alaska
Aquacoustics Inc. on behalf of the Alaska Department of Fish and Game
Kenai River, Alaska
“The goal was to obtain fish length estimates from DIDSON data with a method that is faster and requires fewer user interactions than manual measurements but at the same time produces comparable estimates of Chinook salmon abundance in a mixture model.”
The team at Aquacoustics Inc. in Alaska have developed a semi-automated data-processing approach for DIDSON data using Echoview to count, size and track Chinook salmon in the Kenai River. This work was undertaken on behalf of the Alaska Department of Fish and Game Sport Fish Sonar Program.
Echoview is used in this approach to detect and track the DIDSON fish images and automatically estimate fish length.
DIDSON movie clip of one large Chinook salmon followed by a group of three sockeye-sized salmon in the Kenai River. Images courtesy of the Alaska Department of Fish & Game Sport Fish Sonar Program.
Many of the interactions with Echoview are automated via scripts, which requires the Echoview Automation module. Aquacoustics Inc. have designed a convenient control panel for this called the "Kenai EV Auto-Processor.exe".
The Kenai River sonar site, Alaska. Images courtesy of the Alaska Department of Fish & Game Sport Fish Sonar Program.