Joseph Zydlewski

Contact Information

Phone: 207.581.2853



Ph. D. University of Massachusetts, 1997
B.S. Bates College, 1990


Joe joined the Maine Cooperative Fish and Wildlife Research Unit in 2004 as Assistant Unit Leader, coming from the USFWS Columbia River Fisheries Program Office. He is a Professor in the Department of Wildlife, Fisheries, and Conservation Biology and cooperating faculty in the School of Biology and Ecology and the School of Marine Sciences at the University of Maine, Orono.

Research Interests

Joe’s work centers on the study of fish movements and migrations. Many vital fisheries issues in the northeast United States are dependent upon a rigorous understanding of life history expression. He has effectively addressed both basic and complex management questions in innovative ways, developing a program which includes three main themes: i) Connectivity and River Restoration ii) Physiology and Behavior of Migration , and iii) Species Interactions. As a critical part of his position, Joe’s work is responsive to the requests of MCFWRU cooperators (e.g. Maine Department of Inland Fisheries and Wildlife, the University of Maine’s Department of Wildlife , Fisheries, and Conservation Biology and US Fish and Wildlife Service).

Teaching Interests

As part of his appointment to the graduate faculty at the University of Maine through the MCFWRU, Joe provides graduate instruction in the form of formal courses (e.g. “Movements and Migration” and “Quantitative Freshwater Fisheries Ecology”), directing independent studies of selected topics (fisheries science, migration biology), and interacting with graduate students. Joe serves on numerous committees as degree program advisor, co-advisor, or committee member.

Research Publications

Stich, D.S., Bailey, M., Holbrook, C., Kinnison, and Zydlewski J. (In Press). Catchment-wide survival of wild- and hatchery-reared Atlantic Salmon smolts in a changing system. Journal of Applied Ecology.Download  | 

Altenritter, M., Kinnison, M., Zydlewski, G., Secor, D., and Zydlewski, J. (2015). Dorsal scute microchemistry: a new tool for reconstructing habitat use of shortnose sturgeon. Environmental Biology of Fishes. 98(12):2321-2335Download  | 

Snook, E., Letcher, B., Dubreuil, T., Zydlewski, J., Whiteley, A., Hurley,S., and Danylchuk, A. (2015) Movement patterns of brook trout in a restored coastal stream system in southern Massachusetts. Ecology of Freshwater Fish. DOI: 10.1111/eff.12216Download  |

Link to All Research Publications

Current Projects

Completed Projects


  • Special Problems in Wildlife Ecology (Independent Study) (2015)
  • Movements and Migrations (2014)
  • WLE 650 Graduate Seminar – Movements and Migrations (2013)
  • Link to All Courses

Technical Publications

Loftin, C.S., J. Zydlewski, and A.Elskus. 2008. Examination of mercury contamination in northern two-lined salamanders and slimy sculpin inhabiting watersheds in coastal Maine, Report to Maine Outdoor Heritage Fund, 15 pp

Zydlewski, J. and C.S. Loftin. 2008. Using dendrochonology and stable isotopes to document historical deposition of marine derived nutrients in the Penobscot River Basin, Maine, Report to Penobscot Indian Nation, 4 pp.

Studies on Lake Whitefish in Maine. (2006) Annual Report to the Maine Department of Inland Fisheries and Wildlife.

Link to All Technical Publications