Large River Fish – Management of Aquatic Predators

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NRTG’s MicroCourses offer a dynamic training pathway that’s as flexible as it is enriching to build expertise. Our Large River Fish – Management of Aquatic Predators MicroCourse, spanning four hours, delivers in-depth training in an easily digestible format. It’s designed to maximize your skills for immediate application.     

Throughout history, people worldwide have relied on fishing as a vital food source. As humans, we are the top predators in the aquatic world. However, with the advancement of fishing technology, the most sought-after fish species have come under threat, along with other ocean and river inhabitants that depend on these fish. This disruption in natural predation patterns has led species to migrate in search of food, often becoming ‘invasive’ in their new environments if they thrive. 

Effective fisheries management has become essential to maintain sustainable fish populations and prevent species extinction. 

In this course, you will explore the life histories of various aquatic predators, invasive fish, and marine mammals in major rivers worldwide. You will also learn about management strategies used to balance these ecosystems, examining the successes and challenges of adaptive measures aimed at controlling or eliminating these aquatic predators, with a focus on practices in the US and Canada. 

Join our Large River Fish – Management of Aquatic Predators MicroCourse, to gain a deeper understanding of aquatic ecology, the impact of human activities, and the efforts to preserve our water resources.  

Course will be 4 hours long.   

Instructor Profile

Kathy Mai 

Senior Fisheries Biologist R.P.Bio 

Kathy Mai has worked for 30 years as a fisheries biologist in the US, Germany and Canada. She worked for the Northern Pike Minnow Program on the Columbia River for 5 years, and hazed and bombed predatory sea-lions on the Columbia and Willamette Rivers. She has on-the-water expertise in boat operation, netting, aquaculture, snorkeling, rafting, helicopter surveying, boat electrofishing, and trap installation.  For 14 years Kathy worked for Washington and Oregon Departments of Fish and Wildlife conducting stock assessment for salmon, trout and sturgeon on the Columbia River and tributaries.  Big river work continued in Canada where Kathy conducted fisheries research above and below the dams on Columbia – just further upstream in a different country.    

Kathy has researched endangered species in high mountain habitats, worked on fish passage issues in connection with hydro facilities, and conducted wildlife and river restoration work.  She has been employed by government agencies and indigenous entities to develop and implement site-appropriate assessments for large construction and infrastructure projects throughout the Pacific NW.  Having worked in SE Asia for several years and observed fisheries practices on big rivers in Africa, S America and India Kathy has a particular interest in the skills it takes for big river work.  

Next Available Course

There are no upcoming courses for Large River Fish – Management of Aquatic Predators at this time, please check back again in the future or view our course schedule for more options.
For inquiries on this course, please contact NRTG at: 1-877-388-2172 or

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