ML050480111

Connecticut River Coordinator'S Office - Restoring Migratory Fish to the Connecticut River Basin

ML050480111
Person / Time
Site:	Millstone
Issue date:	12/06/2004
From:	US Dept of Interior, Fish & Wildlife Service
To:	Office of Nuclear Reactor Regulation
References
Download: ML050480111 (2)

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e.Connecticut River Coordinator's Office: Fish Facts - Shortnose Sturgeon Page l of 2 SrmstmIIUCr- rellim

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Fish Facts - Shortnose Sturgeon 0 Description S

Life History Distribution EMa_ 0 0

Status Restoration Efforts DownloEada_actSheet (85 KB Adobe pdf file)

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Description The shortnose sturgeon (Acipenserbrevirostrum) is one of two sturgeon species in the Connecticut River; the other is the Atlantic sturgeon. The shortnose is the smaller of the two, growing to be 2 to 3 feet in length and about 14 pounds in weight. Sturgeons are an ancient species with fossils dating back 65 million years. They are very distinctive, looking like a prehistoric cross between a shark and a catfish. Sturgeons lack teeth and scales but have a I. unique body armor of diamond-shaped bony plates called scutes. Some have been found to be over 60 years old.

WR M Life History Shortnose sturgeon are typically anadromous, migrating from the ocean to fresh water specifically to reproduce. However, of the two populations in the Connecticut River system (formed by the construction of dams), one is considered to be partially landlocked and the other is likely to be amphidromous, moving between fresh and salt water. Shortnose reproduce inthe spring. They broadcast their eggs inareas with rubble substrate. Once hatched, the young fish drift downstream and may eventually swim to brackish water.

Distribution Shortnose sturgeon are found along the Atlantic coast of North America in estuaries and http://www.fws.gov/r5crc/fish/zf acbr.html 12/6/2004

I Connecticut River Coordinator's Office: Fish Facts - Shortnose Sturgeon Page 2 of 2 large rivers. In the Connecticut River, there is a partially landlocked population above the Holyoke Dam up to the Turners Falls Dam in Massachusetts, and another population in the estuary. Shortnose sturgeon rarely venture into the river's larger tributaries, and they are usually found in the mainstem Connecticut river.

Status The shortnose sturgeon is the only fish in the Connecticut River basin that is nationally endangered. It is listed as an endangered species by the Federal government and all State governments throughout its range. As such, it is protected under the Endangered Species Act. The severe decrease in populations is attributed primarily to over-harvesting in the 1800's and early 1900's. Sturgeon were harvested for their meat, skin, swim bladders, and eggs (or roe). Shortnose taken commercially were often the bycatch of Atlantic sturgeon fisheries. Dams and pollution also contributed to the decline. The populations in the Connecticut River are considered to be stable, estimated at 1200-1500 individuals.

Restoration Efforts The shortnose sturgeon is a Federal trust fish, meaning that the Federal government has some responsibility for its recovery. The National Marine Fisheries Service has the lead role in the management of this species. Populations are closely monitored, but much information still needs to be learned about this species. Current research on the behavior of these fish and their fish passage requirements is providing valuable information for the development of management strategies. A recovery plan for the species is under development.

Return to top About Us I Recreational Fishing I Work With Us I Fisheries Management Habitat Restoration I Fish Production l Invasive Species Data I Education I contacts I Links l Site Map I Home U.S. Fish and Wildlife Service This page was last updated on http://www.fws.gov/r5crc/fish/zf acbr.html 12/6/2004