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Endangered status of Atlantic sturgeon up for review

March 27, 2018 — Federal fishing regulators say they are conducting a five-year review of threatened and endangered populations of Atlantic sturgeon.

Populations of sturgeon are listed as threatened in the Gulf of Maine and endangered in New York Bight, the Chesapeake Bay and off the Carolinas and South Atlantic.

The National Oceanic and Atmospheric Administration says the Endangered Species Act requires the agency to conduct the review to ensure the listings are still accurate. The listings are intended to be based on the best available scientific data.

The Atlantic States Marine Fisheries Commission said last year that a sturgeon stock assessment indicated the population is still very low compared to its historical abundance. They face threats such as climate change, ship strikes and fishing.

Sturgeon suffered overfishing in the 20th century when it was harvested for eggs for caviar.

Shortnose sturgeon are listed under the Endangered Species Act (ESA) as an endangered species throughout their range. Atlantic sturgeon are listed as five distinct population segments with those that hatch out in Gulf of Maine rivers listed as threatened, and those that hatch out in other U.S. rivers listedas endangered.

Once thought to number less than 100 in the Merrimack, the river’s shortnose sturgeon population has been on the rebound, researchers have said. Atlantic sturgeon are also found in the Merrimack, up to the Essex Dam in Lawrence.

Two distinct groups of adults, numbering more than 2,000, inhabit the river. One group includes fish born in Haverhill’s spawning grounds, while the other consists of fish born in Maine rivers such as the Kennebec and Androscoggin, which migrate to the Merrimack.

Researchers say that for much of the year, sturgeon are looking for food in the lower part of the Merrimack — from Amesbury to the Joppa Flats in Newburyport — and live there from November to March.

Haverhill is the only place in the river where sturgeon lay their eggs, and that happens in the spring.

Read the full story at the Gloucester Times

 

Surprise Catch: First Shortnose Sturgeon Documented Above Dam in Connecticut River

October 25, 2017 — VERNON, Vt. — This August, a fisherman casting downstream of the Vernon Dam (in Vernon, Vermont) on the Connecticut River had quite a surprise when he reeled in not a walleye or bass, but instead a relic from the age of dinosaurs: an adult-sized shortnose sturgeon!

Sturgeon are among the most primitive of the bony fishes, and have five rows of bony plates or “scutes” covering their bodies. More than once, these odd-looking ancients have been mistaken for sea monsters. Shortnose sturgeon are the smallest of the sturgeon species that live in North America, and have been listed as endangered since 1967. As part of our Recovery Plan for the species, we monitor their populations in a number of rivers along the U.S. East Coast.

Read the full story at NOAA Fisheries 

 

After a Century, Shortnose Sturgeon Return to Historic Habitat

November 17, 2015 — The following was released by NOAA Fisheries:

ORONO, Maine – Endangered shortnose sturgeon have rediscovered habitat in the Penobscot River that had been inaccessible to the species for more than 100 years prior to the removal of the Veazie Dam in 2013. University of Maine researchers confirmed evidence that three female shortnose sturgeon were in the area between Veazie (upriver of the dam remnants) and Orono (Basin Mills Rips), Maine in mid-October. Researchers had previously implanted these sturgeon with small sound-emitting devices known as acoustic tags to see if they would use the newly accessible parts of the river.

Among the most primitive fish to inhabit the Penobscot, sturgeon are often called “living fossils” because they remain very similar to their earliest fossil forms. Their long lives (more than 50 years) and bony-plated bodies also make them unique. Historically, shortnose sturgeon and Atlantic sturgeon (a related species also present in the watershed) had spawning populations in the Penobscot River as far upstream as the site of the current Milford dam, and provided an important food and trade source to native peoples and early European settlers. Overharvest and loss of suitable habitat due to dams and pollution led to declines in shortnose sturgeon populations and a listing as endangered under the U.S. Endangered Species Act (ESA) in 1967. In 2012, Gulf of Maine populations of Atlantic sturgeon were listed as threatened under the ESA.  

Today, a network of sound receivers, which sit on the river bottom along the lower river from Penobscot Bay up to the Milford Dam, detect movement and location of tagged fish. According to Gayle Zydlewski, an associate professor in the University of Maine School of Marine Sciences, the three individual fish observed were females. These fish have since been tracked joining other individuals in an area identified as wintering habitat near Brewer, Maine. Wintering habitat in other rivers is known to be staging habitat for spawning the following spring.

“We know that shortnose sturgeon use the Penobscot River throughout the year, and habitat models indicate suitable habitat for spawning in the area of recent detection upriver of Veazie, although actual spawning has not yet been observed,” Zydlewski said.

Since 2006, Zydlewski has been working with Michael Kinnison, a professor in UMaine’s School of Biology and Ecology, and multiple graduate students, including Catherine Johnston, to better understand the sturgeon populations of the Penobscot River and Gulf of Maine. Johnston, who has been tagging and tracking sturgeon in the Penobscot for two years to study the implications of newly available habitat to shortnose sturgeon, discovered the detections of sturgeon upstream of the Veazie dam remnants. Each new bit of information adds to the current understanding of behavior and habitat preferences of these incredible fish. 

“We’re very excited to see sturgeon moving upstream of where the Veazie Dam once stood, and into their former habitats,” said Kim Damon-Randall, assistant regional administrator of the National Oceanic and Atmospheric Administration (NOAA) Fisheries’ Protected Resources Division. “We need to do more research to see how they’re using it, but it’s a tremendous step in the right direction.”

Habitat access is essential for the recovery of these species. The removal of the Veazie Dam is only a portion of the Penobscot River Restoration Project, which, when combined with the removal of Great Works Dam in 2012, restores 100 percent of historic sturgeon habitat in the Penobscot. In addition to dam removals, construction of a nature-like fish bypass at the Howland Dam in 2015 significantly improves habitat access for the remaining nine species of sea-run fish native to the Penobscot, including Atlantic salmon and river herring.   

“Scientific research and monitoring of this monumental restoration effort has been ongoing for the past decade,” said Molly Payne Wynne, Monitoring Coordinator for the Penobscot River Restoration Trust. “The collaborative body of research on this project is among the most comprehensive when compared to other river restoration projects across the country,” Wynne said.

NOAA Fisheries is an active partner and provides funding for this long-term monitoring collaboration that includes The Penobscot River Restoration Trust, The Nature Conservancy and others. These efforts are beginning to shed light on the response of the river to the restoration project. Restoration of the full assemblage of sea-run fish to the Penobscot River will revive not only native fisheries but social, cultural and economic traditions of Maine’s largest river.

After measurement and implantation of a small tagging device, graduate student L. Izzo releases a shortnose sturgeon back into the Penobscot (ESA Permit #16036 compliant, photo courtesy G. Zydlewski).

 

What To Do If You Catch a Sturgeon

September 10, 2015 — The following was released by NOAA Fisheries:

Atlantic and shortnose sturgeons are protected species. If you accidentally catch a sturgeon, keep the fish in the water and remove the hooks. If the hooks are in too deep, cut the line. If you need to remove the fish from the water in order to do this, use wet hands or a wet rag to support the belly. Always support the fish in the water until it is able to swim away on its own. 

To receive a free sturgeon tackle box sticker that tells you what to do if you catch a sturgeon or for other questions about these fish, please call 978-281-9328 or email Edith Carson at edith.carson@noaa.gov. Atlantic and shortnose sturgeons are protected species. If you accidentally catch a sturgeon, keep the fish in the water and remove the hooks. If the hooks are in too deep, cut the line. If you need to remove the fish from the water in order to do this, use wet hands or a wet rag to support the belly. Always support the fish in the water until it is able to swim away on its own. 

For commercial fishermen, we have a downloadable page on Atlantic sturgeon resuscitation.

Find out more about these ancient fish on our Atlantic Sturgeon Recovery Plan web pages.

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