Fish Ecology Group

960 720 Stroud Water Research Center

The Fish Ecology Group works to determine why fish in streams have the distributions they do. Our research includes field studies of fish movement, species composition and productivity; genetic studies of population structure; laboratory studies of tolerance limits to chemical, physical and biological factors; as well as mathematical modeling of population dynamics.

Fish Ecology Staff

David Arscott, Ph.D.

David Arscott, Ph.D.

Executive Director, President
Laura Zgleszewski

Laura Zgleszewski

Staff Scientist

Fish Ecology News

Photo of an American eel being weighed as part of a scientific study.

White Clay Creek: A Pennsylvania Stream Responds to Reforestation

The East Branch of White Clay Creek is the subject of a restoration study on a time scale rarely applied to streams or rivers anywhere in the world.
Video still from Episode 3 of the WHYY "Stories From the Streams" video series

Stories From the Streams: Stream Fever

Discover why streams that are too warm endanger the habitats of mayflies and other life sustaining insects. Episode 3 in the “Stories from the Streams” series from WHYY TV12.
A small fish in Rio Rincon, Costa Rica.

Fish of the Río Rincón, Costa Rica

Researchers from the Stroud Center visited the Río Rincón on the Osa Peninsula in Costa Rica to scope out potential sites for an upcoming survey of the physical, chemical, and
A golden shiner from a tributary to the Brandywine Creek.

Sharing Our Science: Spring 2014

Stroud Center Tackles Watershed Restoration; Getting to Know Rock Snot; Something Smells Fishy.
A stream cascade in Lofty Creek, Pennsylvania.

Earth Week Presentation on Stream Fish Ecology

Learn how you can help improve freshwater ecosystems by monitoring fish populations, educating the public, and expanding stream restoration efforts.
Willy Eldridge with a bronze fish sculpture.

UpStream Newsletter, Summer 2008

Willy Eldridge recently joined the Stroud™ Water Research Center to launch its Fish Molecular Ecology Department.
A stream cascade in Lofty Creek, Pennsylvania.

Fish Ecologist and Geneticist Joins the Stroud Center

Eldridge’s research is concerned with understanding and conserving the genetic diversity that is necessary for fish to adapt to changing environments.