Fisheries

Four Peaks employs a multidisciplinary team of scientists that address complicated projects related to juvenile and adult fish behavior, survival, mitigation, and ecology. These projects are often in highly modified systems, with regulatory compliance and population recovery in mind. Our ability to deploy a wide range of cutting-edge technologies allows project sponsors to make sound decisions on complex ecological issues. Whether it’s evaluating juvenile fish passage at high-head dams, nationwide consultation on hatchery facilities, or habitat restoration and monitoring, we have the team to support sustainable approaches to benefit fisheries.

Our expertise and services include:

Fish Passage and Survival

Juvenile and adult fish behavior and survival analyses
Monitoring and evaluation using:
- Acoustic and radio telemetry
- Passive integrated transponder (PIT) technology
- Imaging sonar (DIDSON and ARIS)
- Sound and vibration monitoring
- Acoustic Doppler current profiler
Expertise in a range of in-water structures, including:
- Small diversion dams
- High-head dams
- Mainstem hydroelectric projects
- Heavily modified systems
- Lentic and lotic environments
Evaluation of passage mechanisms, including:
- Adult fishways
- Juvenile bypass systems
- Collection and trapping facilities
- Entrainment monitoring
Avian predation monitoring