Fish Impingement Monitoring

• Imaging sonar system for “video-like” clarity of fish activity and behaviour.
• Fish counts, swimming speed and direction easily measured.
• Operates day & night and in high turbidity. No light source required.
• Continuous logging and automated post-processing allows long-term monitoring.
• Compliant with EPA Clean Water Act § 316(b) monitoring requirements.

What is ARIS & DIDSON?

ARIS (Adaptive Resolution Imaging Sonar) and it’s predecessor, DIDSON (Dual-frequency IDentification SONar) have been referred to as an “acoustic camera” because of the near video-quality images they produce using very high frequency sound waves. Both sonars can be deployed in shallow waters, where traditional sonars have more difficulty, and they allow the user to visualize fish targets with near video quality below the water’s surface.

What can ARIS & DIDSON be used for?

ARIS and DIDSON have many applications in fisheries and aquatic science. It can be used for enumerating and measuring indivudual fish passing through streams, fish ladders, and other areas of interest and for identifying bottom features and habitat.

Using ARIS and DIDSON, Milne Technologies has helped clients to monitor migratory fishes (including Lake Sturgeon, Salmon spc., Striped Bass and river spawning Lake Whitefish) as well as view underwater nets to ensure proper deployment and to quantify "fish flux" and escapement rates.

Services that Milne Technologies provides related to ARIS and DIDSON:

• Purchasing or leasing of appropriate equipment depending on project scope and objectives.
• On-site set-up and deployment of equipment and project maintenance.
• Develop scientifically rigorous study design in consulation with client.
• Detailed analysis of data including automated enumuration and measurement of fish targets.
• Written report including publication-quality methods, results and recomendations for future projects.