Guillermo  Giannico


Oregon Sea Grant
Oregon Fisheries Extension
juvenile salmon ecology
coho salmon
fish and agriculture
tide gates
fish passage
Guillermo Giannico
Associate Professor, Fisheries Extension

Freshwater Fish Ecology

OSU Campus
Fisheries and Wildlife
Oregon State University
Nash Hall Room 114
Corvallis, OR 97331
United States
(541) 737-2479


Salmonid behavior. Fish distribution and habitat selection in freshwater and estuarine systems. Salmonid habitat restoration. Influence of riparian vegetation and land use activities on fish habitat. Integrated watershed management. Fish passage. Fish in agricultural landscapes.


FW 326* Integrated Watershed Management


Ph.D. - University of British Columbia, Canada
M.S. - University of Victoria, Canada
Licenciatura en Ciencias Naturales, Universidad Nacional de La Plata, Argentina

I accept graduate students for the Fisheries and Wildlife Department


The Influence of Release Strategy and Migration History on Capture Rate of Oncorhynchus mykiss in a Rotary Screw Trap
Tattam, I., J. Ruzycki, P. Bayley, H. Li, and G. Giannico

Body Size and Growth Rate Influence Emigration Timing of Oncorhynchum mykiss
Tattam, I., J. Ruzycki, H. Li, and G. Giannico

Calapooia Watershed, Oregon: National Institute of Food and Agriculture - Conservation Effects Assessment Project
Hoag, D., G. Giannico, J. Li, T. Garcia, W. Gerth, M. Mellbye, G. Mueller-Warrant, S. Griffith, D. Osmond, G. Jennings, M. Arabi, and D. Meals

Performance of a Full-Duplex Passive Integrated Transponder (PIT) Antenna System in Estuarine Channels
Bass, A., G. Giannico, and G. Brooks

Impact of Land Use Patterns and Agricultural Practices on Water Quality in the Calapooia River Basin of Western Oregon
Mueller-Warrant, G.W., S. Griffith, G. Whittaker, G. Banowetz, W. Pfender, T. Garcia, and G. Giannico

Seasonal Migrations of Adult and Sub-adult Redband Trout in a High Desert Basin of Eastern Oregon, USA
Anderson, M., G. Giannico and S. Jacobs

Remote Sensing Classification of Grass Seed Cropping Practices in Western Oregon
Mueller-Warrant, G.W., G.W. Whittaker, S.M. Griffith, G.M. Banowetz, B.D. Dugger, T.S. Garcia, G.R. Giannico, K.L. Boyer and B.C. McComb.

Making Sense of Nitrogen Flux Patterns in the Calapooia River Basin
Mueller-Warrant, G., S. Griffith, G. Whittaker, G. Banowetz, W. Pfender, T. Garcia, and G. Giannico. Seed Production Research at Oregon State University. 2010- Ext/CrS 130, 3/11. 40-44 p.

Grass Seed Agriculture and Invertebrate Communities of Seasonal Wetlands in the Southern Willamette Valley
Wyss, L., A. Herlihy, B. Dugger, J. Li, B. Gerth, and G. Giannico.
Seed Production Research at Oregon State University. 2010- Ext/CrS 130, 3/11.

Migration and Passage of Redband Trout in the Donner und Blitzen River
Anderson, M., G. Giannico, and S. Jacobs  

Fish Use of Intermittent Watercourses Draining Agricultural Lands in the Upper Willamette Valley, Oregon
Colvin, R., G. Giannico, J. Li, and K. Boyer

Setting River Restoration Priorities: a Review of Approaches and a General Protocol for Identifying and Prioritizing Actions
Beechie, T., G. Pess, P. Roni, and G. Giannico

Landscape topography and the distribution of Lahontan cutthroat trout (Oncorhynchus clarki henshawi) in a high desert stream
Boxall, G., G. Giannico,  and H. Li

Juvenile coho salmon (Oncorhynchus kisutch) responses to salmon carcasses and in-stream wood manipulations during winter and spring
Giannico, G. and S. Hinch

Tide Gates in the Pacific: Operation, Types, and Environmental Effects
Giannico, G. and J. Souder. ORESU-T-05-001.

The Effects of Tide Gates on Estuarine Habitats and Migratory Fish
Giannico, G. and J. Souder

The Effect of Wood and Temperature on Juvenile Coho Salmon Winter Movement, Growth, Density and Survival in Side-Channels
Giannico, G. and S. Hinch

Coho Salmon and Water Management in the Klamath Basin
Giannico, G. and C. Heider

Habitat Selection by Juvenile Coho Salmon in Response to Food and Woody Debris Manipulations in Suburban and Rural Stream Sections
Giannico, G. 

Outreach and Extension

Fish ecology and behavior. Integrated watershed management. Aquatic habitat restoration. Restoration planning and monitoring. Team leader for the module on stream assessment and restoration of the Watershed Stewardship Education Program

Video on fish and wildlife occupying seasonal agricultural waterways. Title: Flooded Fields and Drainage Ditches of the Willamette Valley: habitat legacies for native fish and wildlife. Produced by Freshwaters Illustrated with support from Oregon State University and Oregon Sea Grant. Executive Producer Guillermo Giannico. 

Video from Oregon Field Guide, OPB - Ditch Fish 

Fun Fact

Enjoys hiking, sailing, running, travelling