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Bay Blog: Nanticoke River

May
31
2013

Photo Essay: Scientists restock American shad to Delaware waterway

For close to a decade, scientists and volunteers have spent their springs at the Nanticoke Shad Hatchery, working to rebuild populations of American shad. 

In this small building near Bethel, Del., hundreds of thousands of American shad are raised each year before they are returned to their native spawning grounds in the Nanticoke River. This spring, the hatchery stocked about 558,000 fish to the waterway.

In the early 1900s, excessive commercial harvests took a heavy toll on American shad. Over the past century, poor water quality and the construction of dams that restrict the anadromous fish’s access to upstream spawning grounds have caused shad populations to decline.

Image courtesy Library of Congress

Today, restoration efforts are giving American shad a much-needed population boost. Restocking programs across the Chesapeake Bay watershed—combined with harvest restrictions, improved water quality and the removal of dams—are critical to the re-establishment of the species.

American shad spend most of their lives in brackish and saltwater before returning to their birth waters to spawn. The Nanticoke Shad Hatchery collects its brood stock directly from the Nanticoke River and its Deep Creek tributary to ensure adult fish will return to the waterway and to preserve the genetic integrity of the local shad population.

Throughout the spring spawning season, which runs from mid-March through April, mature shad that are held in the hatchery’s closely monitored, 3,500-gallon spawning tanks periodically release eggs and sperm.

On the morning after an overnight spawning event, pea-sized eggs are filtered into an egg collection tank.

“Bad eggs” are removed from the tank before fertilized eggs are measured by volume and placed in incubation jars to grow.

Eggs that survive to the “eyed” stage are moved to one of four culture tanks, where they will hatch into larval fish within a week.

After a few more days spent in the safety of the culture tanks, the larval fish absorb their nutritive yolk sac and transform into fry that are ready to feed on their own in their natural habitat.

Before the hatchery-produced fish are released into the Nanticoke River, scientists mark them with oxytetracycline. Tracking the fish will allow scientists to gauge their survival and stocking success over time.

Six years of sampling surveys on the Nanticoke River show that adult American shad abundance has increased, while the number of hatchery-produced juveniles has decreased. According to hatchery manager Mike Stengl, this suggests the hatchery is succeeding in its long-term goal: to reduce the percentage of hatchery-grown fish in the river and encourage the wild population to spawn on its own.

Success at the Nanticoke Shad Hatchery and at other hatcheries across the region are giving American shad a second chance at survival in the watershed.

View more photos on the Chesapeake Bay Program Flickr page.

Steve Droter's avatar
About Steve Droter - Steve is Multimedia Coordinator (Photographer & Video Producer) for the Chesapeake Bay Program. @SteveDroter



Sep
26
2012

Three Delaware towns will improve water quality in state's tributaries to Chesapeake Bay

Three Delaware towns have received grant funding and technical assistance to create habitat and improve water quality in Delaware's tributaries to the Chesapeake Bay. 

The towns of Greenwood, Laurel and Bethel, located along the Route 13 corridor in Sussex County, have set their sights on curbing stormwater runoff to reduce the flow of nutrients and sediment into the Nanticoke River and Broad Creek. 

When rainfall runs across paved roads, parking lots, lawns and golf courses, it can pick up pollutants before washing down storm drains and into local waterways. By using best management practices—think rain barrels, green roofs or forested buffers along the shores of streams and rivers—to target the fastest growing source of pollution into the Bay, these Delaware towns can help position the state to meet its pollution reduction goals.

The Town of Greenwood, for instance, will restore a buffer of native vegetation along a tax ditch that drains into the Nanticoke River, establishing habitat and reducing stormwater runoff from two industrial buildings in the heart of the community. 

The neighboring towns of Laurel and Bethel will develop plans to bring green infrastructure to Broad Creek, stabilizing stream banks, reducing stormwater discharge and eliminating local flooding. Bethel might even implement innovative practices in the oldest part of town, bringing permeable pavement and living shorelines to the town's historic district. 

"The projects in Greenwood, Laurel and Bethel will improve the water quality of our local streams and rivers, reduce flooding and enhance the quality of life for local communities," said Delaware Department of Natural Resources and Environmental Control (DNREC) Secretary Collin O'Mara. "By ... working together, we are securing resources necessary to ensure that our waterways are safe, swimmable and fishable for current and future generations."

Funding for the Greenwood project, totaling $35,000, was awarded through the National Fish and Wildlife Foundation's (NFWF) Chesapeake Bay Stewardship Fund.Technical assistance for the initiatives in Laurel and Bethel, valued at $100,000, was awarded through NFWF's Local Government Capacity Building Initiative. To learn more about the projects, visit the DNREC website.



May
17
2012

Four new rivers join Captain John Smith Chesapeake Trail

The National Park Service, with support of five states, has designated four rivers – the Susquehanna, Chester, upper Nanticoke and upper James – as new sections of the Captain John Smith Chesapeake National Historic Trail.

Maryland Governor Martin O'Malley talks about the Captain John Smith Trail.

(Image courtesy Michael Land/National Park Service)

Recognition of these connecting waterways adds 841 miles to the 3,000-mile-long trail and underscores their significance to the history, cultural heritage and natural resources of the Chesapeake region.

Joel Dunn, executive director of Chesapeake Conservancy said, “These [connecting] trails provide a focus around which communities can engage in efforts to increase recreational use of the Chesapeake's great rivers and protect the river corridors and landscapes. This kind of conservation helps communities celebrate their history and culture, protect wildlife habitat, and protect lands that have unique ecological values.”

The designation comes after considerable collaboration between the National Park Service, the five states through which these rivers flow, numerous American Indian tribes and strong support of the conservation community. The National Park Service will work closely with these partners to provide technical and financial assistance, manage resources, enhance facilities, and mark and promote interpretive routes along the connecting trails.

Visit the Chesapeake Conservancy’s website to learn more about these new rivers and the entire Smith Trail.



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