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About diadromy.com

Diadromy.com is devoted to spreading information about fish migration, science, and physiology in easily digestible chunks. This blog was created by a professional fish biologist who wants to make science, management, and technical information about diadromous species understandable for everyone with an interest. It was initially envisioned to spread localized information on diadromous species throughout New England but has been expanded for coverage throughout all areas of the world.

Jason Boucher, PhD
Jason Boucher

Dr. Jason Boucher is a fish biologist with a love of diadromous species, especially American shad. I am a native of Massachusetts, but had the great fortune to spend summers with my family near the coast in York, ME as a child. I would spend endless hours wandering the seashore looking for sea creatures of all sorts. I vividly remember sitting in the back seat as we drove over the Piscataqua River Bridge and wondering what might be swimming in the river below. I had no idea at the time that American shad were down there, or that I would be chasing that species across the eastern seaboard to discover more of their amazing life history.

Standing outside Old Lyme Seafood on the Connecticut River before purchasing some fresh shad for dinner

I received my B.Sc. in Aquaculture from the Florida Institute of Technology. I had the opportunity to work in the lab of Dr. Richard Turner, which started with menial tasks like cleaning degraded, unrecognizable specimens out of jars. Over time I was tasked with reviewing the basketstar specimens that were on loan from the Hourglass Collections. This work led to my first discovery and eventual publication – that an identification key misidentified smaller specimens  of Astrophyton muricatum as a second species.

I remained at the Florida Institute of Technology for an M.Sc. in Marine Biology with Dr. Jon Shenker. This was also my first exposure to working with American shad! This work involved sampling eggs and larvae of American shad in the upper reaches of the St. Johns River, FL to estimate spawning dates, locations, and growth rates. (Yes, Jon, I know that I still need to publish my thesis!)

I immediately moved on to working on a Ph.D in Marine Science (Fisheries Oceanography) with Dr. Changsheng Chen at the UMass School for Marine Science & Technology in New Bedford, MA. There was a steep learning curve as I moved from field studies and lab work to scientific programming! This work focused on developing individual-based models of egg and larval haddock in the Gulf of Maine-Georges Bank region, which were coupled to the high-resolution FVCOM hydrodynamic model.

After finishing my Ph.D I accepted a postdoctoral scientist position at Shanghai Ocean University in Shanghai, China. My work focused on the development of individual-based models of copepod species in the Arctic and sub-Arctic seas. After a year in China I moved back to the U.S. for a postdoctoral scientist position at the Northeast Fisheries Science Center in Woods Hole, MA. I worked on projects ranging from the development of stock assessment model selection methods to American shad reproduction and fecundity.

I spent four years in Woods Hole, then accepted a position with the State of Delaware’s Division of Fish & Wildlife. In my current role as a biometrician, I am responsible for stock assessments and quantitative approaches for the freshwater and anadromous fish and invertebrate species of Delaware. I get to work with American shad, American eel, horseshoe crabs, largemouth bass, river herring, striped bass, sturgeon, and weakfish (among others)! A quick disclaimer: all opinions are mine alone and do not represent the views or opinions of the State of Delaware or anyone else.

Outside of my professional roles, I am a member of the Southeast Massachusetts chapter of Trout Unlimited and a lifetime member of the Delaware River Shad Fishermen’s Association.


My research is varied, ranging from echinoderm physiology to larval fish ecology to the development of multispecies stock assessment models.  Here is a short list of my publications that I mentioned: