Shad & River Herring
Life History
Shad and river herring are anadromous fish that spend the majority of their adult lives at sea, only returning to freshwater in the spring to spawn. Historically, shad and river herring spawned in virtually every river and tributary along the coast.
Shad young leave their home river within the first year and will spend the next few years at sea, schooling in large numbers with shad from other regions and feeding on plankton and other small fish or crustaceans. Upon reaching maturity – at about age four – they will return to the streams they were born in to spawn. Males or "buck shad" return first, followed by females or "roe shad." They spawn usually at night or during overcast days. In the southern range, females release as many as 700,000 eggs during the spawning season, but both males and females normally die after spawning. In the northern range, females typically release 300,000 eggs or less during the spawning season; however, most shad will return again to spawn in the following years, with some shad living up to ten years.
River herring is a collective term for alewife and blueback herring. Alewife spawn in rivers, lakes, and tributaries from northeastern Newfoundland to South Carolina, but are most abundant in the Mid-Atlantic and the Northeast. Blueback herring prefer to spawn in swift flowing rivers and tributaries from Nova Scotia to northern Florida, but are most numerous in waters from Chesapeake Bay south. Mature alewife (ages three to eight) and blueback herring (ages three to six) migrate rapidly downstream after spawning. Juveniles remain in tidal freshwater nursery areas in spring and early summer, but may also move upstream with the encroachment of saline water. As water temperatures decline in the fall, juveniles move downstream to more saline waters. Little information is available on the life history of juvenile and adult river herring after they emigrate to the sea and before they mature and return to freshwater to spawn.
Commercial & Recreational Fisheries
Young angler with an American shad. Photo credit: Peter L. Groves, Woo's Shad Fishing
Species of shad and river herring once supported the largest and most important commercial and recreational fisheries along the Atlantic coast. Since colonial times, the blockage of spawning rivers by dams and other impediments, combined with habitat degradation and overfishing, have severely depleted shad and river herring populations.
Commercial landings for all these species have declined dramatically from historic highs. Commercial landings by domestic and foreign fleets peaked at 140 million pounds in 1969. Since 2000 domestic landings totaled less than four million pounds in any given year, with a historic low of 823,000 pounds occurring in 2006.
Recreational catches of these species remain largely unknown. The Marine Recreational Information Program (MRIP) estimates the numbers of river herring harvested and released by anglers, but estimates are imprecise, show little trend, and are deemed not useful for management purposes. MRIP concentrates its sampling strata in coastal waters and does not capture data on recreational fisheries occurring in inland waters. Few states conduct creel surveys or other consistent survey instruments (diary or log books) in inland waters to collect data on recreational catch of river herring. Some data are reported in the state chapters of the current stock assessment, but data are too sparse to conduct systematic comparisons of trends.
The Commission also continues to collaborate with NEFMC and MAFMC to address the bycatch of these species in federal fisheries. NEFMC recently approved a 312 mt catch cap for shad andriver herring in the Atlantic herring fishery. MAFMC approved a 236 mt bycatch cap in the Atlantic mackerel fishery and established a working group to address issues related to river herring conservation and management.
Stock Status
The 2012 river herring benchmark stock assessment found of the 52 stocks of alewife and blueback herring for which data were available for use in the assessment, 23 were depleted relative to historic levels, one stock was increasing, and the status of 28 stocks could not be determined because the time-series of available data was too short. Estimates of abundance and fishing mortality could not be developed because of the lack of adequate data. The depleted determination was used instead of overfished because of the many factors that have contributed to the declining abundance of river herring, which include not just directed and incidental fishing, but also habitat loss, predation, and climate change.
In 2011, the National Resources Defense Council petitioned NOAA Fisheries to list river herring on the endangered species list throughout all or part of the species range. NOAA Fisheries conducted a status review and found that the listing was not warranted in 2013. As part of that finding, NOAA Fisheries committed to partnering with the Commission and other stakeholders to develop a comprehensive conservation plan for river herring throughout its entire range. In May 2015, the Commission and NOAA Fisheries released the River Herring Conservation Plan, with the goals of increasing public awareness about river herring, alewife (Alosa pseudoharengus) and blueback herring (A. aestivalis), and fostering cooperative research and conservation efforts to restore river herring along the Atlantic coast. The plan, which is available online and will be refined over time with public input, builds upon past and current river herring conservation projects and coordinates ongoing activities. The Plan was developed with input and information provided by the River Herring Technical Expert Working Group (TEWG), a group of scientists, industry representatives, conservation groups, tribal leaders, and government officials with expertise related to river herring. The Plan seeks to achieve the following goals:
- Increase coordination of river herring data collection, research and conservation
- Identify and undertake key research projects related to assessment and conservation
- Identify any further conservation actions to address threats
- Cultivate and engage research groups to address key topics in protecting or restoring herring populations
- Identify funding sources and secure funds for river herring research and conservation
- Improve information to be used in conservation efforts and incorporated into the next assessment
- Increase public outreach about river herring and the need for addressing impacts to these resources
Atlantic Coastal Management
Shad and river herring are managed under Amendment 3 to the Interstate Fishery Management Plan for Shad and River Herring (American Shad Management) and Amendment 2 to the Interstate Fishery Management Plan for Shad and River Herring (River Herring Management), respectively. Amendment 2 prohibits state waters commercial and recreational fisheries beginning January 1, 2012, unless a state or jurisdiction has a sustainable management plan reviewed by the Technical Committee and approved by the Management Board (see below for links to the approved plans). In February 2010, the Shad and River Herring Management Board approved Amendment 3, which revised American shad regulatory and monitoring programs. The Amendment was developed in response to the 2007 American shad stock assessment, which found that most American shad stocks were at all time lows and did not appear to be recovering. The Amendment requires similar management and monitoring as developed in Amendment 2. Specifically, Amendment 3 prohibits state waters commercial and recreational fisheries beginning January 1, 2013, unless a state or jurisdiction has a sustainable management reviewed by the Technical Committee and approved by the Management Board (see below for links to the approved plans).
Shad Sustainable Fishery Management Plans -- Connecticut l Delaware River Basin l Potomac River Fisheries Commission l North Carolina l South Carolina l Georgia l Florida
River Herring Sustainable Fishery Management Plans -- Maine l New Hampshire l Massachusetts l New York l North Carolina l South Carolina
Amendment 3 also requires states and jurisdictions to submit a habitat plan regardless of whether their commercial fishery would remain open. The habitat plans outline current and historical spawning and nursery habitat, threats to those habitats, and habitat restoration programs in each of the river systems. The purpose of the habitat plans is to provide a record of the major threats facing American shad to aid in future management efforts. The habitat plans provide a comprehensive picture of threats to American shad in each state and include collaboration with other state and federal agencies (e.g., state inland fish and wildlife agencies, water quality agencies, U.S Army Corps of Engineers).
The two largest threats identified in the habitat plans were barriers to migration and a lack of information on the consequences of climate change. A key benefit of the habitat plans is that each river system relevant to shad now has its threats characterized. The habitat plans will be filed with the Federal Energy Regulatory Commission to ensure that shad habitat is considered when hydropower dams are licensed. They will also be shared with inland fisheries divisions to aid in habitat monitoring and restoration efforts. In February 2014, the Board approved habitat plans for the majority of states and jurisdictions (see below for links to the approved plans). It is anticipated that habitat plans will be updated every five years.
State & Regional American Shad Habitat Plans -- Maine l New Hampshire l Massachusetts l Connecticut River l Rhode Island l Connecticut l Delaware River Basin l Maryland l District of Columbia l Pennsylvania l Virginia l North Carolina l South Carolina l Savannah River l Georgia
Management Plans & FMP Reviews
- Amendment 3 to the Interstate Fishery Management Plan for Shad and River Herring (American Shad Management) (February 2010)
- Amendment 2 to the Interstate Fishery Management Plan for Shad and River Herring (River Herring Management) (May 2009)
- Addendum I (August 2002)
- Technical Addendum I (February 2000)
- Amendment 1 to the Interstate Fishery Management Plan for Shad & River Herring (April 1999)
- 1988 Supplement to American Shad and River Herring FMP (October 1988)
- Fishery Management Plan for American Shad and River Herrings (October 1985)
Stock Assessment Reports
- River Herring - River Herring Benchmark Assessment: Volume I (includes Terms of Reference & Advisory Report, Technical Committee Response to Peer Review Report, and Coastwide Assessment) (May 2012)
- River Herring - River Herring Benchmark Assessment: Volume II (includes State/Jurisdiction-specific Stock Status Summaries) (May 2012)
- River Herring - River Herring Stock Assessment Overview (May 2012)
- Shad - American Shad Terms of Reference & Advisory Report (Aug 2007)
- Shad - American Shad Stock Assessment Report for Peer Review: Volume I - Stock Assessment Overview (Aug 2007)
- Shad - American Shad Stock Assessment Report for Peer Review: Volume II - State-Specific Assessments for Maine to Delaware River and Bay (Aug 2007)
- Shad - American Shad Stock Assessment Report for Peer Review: Volume III: State-Specific Assessments for Maryland to Florida (Aug 2007)
- Shad - American Shad & Atlantic Sturgeon Stock Assessment Peer Review: Terms of Reference and Advisory Report (conducted March 1998; printed July 1998) (Jul 1998)
- Shad - American Shad Stock Assessment Peer Review Report (Mar 1998)
- Stock Assessment of River Herring from Selected Atlantic Coast Rivers (Nov 1990)
- River Herring - Stock Assessment of River Herring from Selected Atlantic Coast Rivers (Nov 1990)
- Investigations of Ocean Landings for American Shad and River Herrings from United States East Coast Waters (Sep 1989)
- Stock Assessment of American Shad from Selected Atlantic Coast Rivers (Oct 1988)
- Shad - Stock Assessment for American Shad from Selected Atlantic Coast Rivers (Oct 1988)
Meeting Summaries & Reports
Press Releases
- River Herring Data Collection Standardization Workshop Scheduled (October 2015)
- ASMFC & NOAA Fisheries Release River Herring Conservation Plan to Aid in Restoration Efforts (May 2015)
- ASMFC & NOAA Fisheries Award Funding to Two Research Projects to Advance Understanding of River Herring Populations (January 2015)
- Federal Funds Available to Support River Herring Research and Conservation (October 2014)
- ASMFC River Herring Ageing Workshop Report Establishes Standards for Consistent Coastwide Ageing Techniques (August 2014)
- ASMFC River Herring Benchmark Assessment Indicates Stock is Depleted (May 2012)
- ASMFC Approves American Shad Amendment. States Water Fisheries to be Closed by January 1, 2013 unless Sustainability is Demonstrated; Promotes Catch and Release Recreational Fisheries (February 2010)
- ASMFC Approves River Herring Amendment (May 2009)
- ASMFC Shad Board Initiates Development of Amendment 3 to the Shad & River Herring Plan: Amendment to Address Major Findings of Benchmark Stock Assessment (November 2007)
- ASMFC American Shad Stock Assessment Passes Peer Review: Findings Indicate that Most Shad Stocks Are Not Recovering (August 2007)