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Species Directory

Atlantic Salmon (Protected)

Overview In the Spotlight Conservation & Management Science Resources

Atlantic Salmon (Protected)

Salmo salar

Atlantic salmon illustration
Also Known As
Sea run salmonKeltsBlack salmon

Protected Status

ESA Endangered
Gulf of Maine DPS

Quick Facts

Weight
Average 8 to 12 pounds but may reach 30 pounds
Lifespan
3 to 7 years
Length
Average 28 to 30 inches
Threats
Habitat impediments (dams), Marine survival, Habitat degradation, Disease, Aquaculture
Region
New England/Mid-Atlantic
See Regulatory Actions
Atlantic salmon swimming close to rocks.

About The Species

Atlantic salmon, also known as the “King of Fish,” are anadromous, which means they can live in both fresh and saltwater. Atlantic salmon have a relatively complex life history that begins with spawning and juvenile rearing in rivers. They then migrate to saltwater to feed, grow, and mature before returning to freshwater to spawn.  

Atlantic salmon are vulnerable to many stressors and threats, including blocked access to spawning grounds, habitat degradation caused by dams and culverts, and poor marine survival. They are considered an indicator species or a “canary in the coal mine.” This means that the health of the species is directly affected by its ecosystem health. When a river ecosystem is clean and well-connected, its salmon population is typically healthy and robust. When a river ecosystem is not clean or well-connected, its salmon population will usually decline.  

Atlantic salmon in the United States were once native to almost every coastal river northeast of the Hudson River in New York. But commercial fishing in Atlantic salmon fisheries reduced their population size until the fisheries closed in 1948. Commercial and recreational fishing for wild sea run Atlantic salmon is still prohibited in the United States. All Atlantic salmon in the public market is cultured and commercially grown. Currently, the last wild populations of U.S. Atlantic salmon are found in at least eight rivers in Maine. These populations comprise the Gulf of Maine distinct population segment, which is listed as endangered under the Endangered Species Act. Some populations in southern Canada and Europe are also declining significantly, creating concern about the status of this species globally. In addition, the Gulf of Maine DPS is one of nine Species in the Spotlight. This means that NOAA Fisheries has made it a priority to focus recovery efforts on research to better understand the major threats and stabilize the Gulf of Maine DPS by improving access to quality habitat and thus, preventing its extinction.

Our dedicated scientists and partners use a variety of innovative techniques to conserve Atlantic salmon and to protect and rebuild depleted endangered populations. NOAA Fisheries also works with partners to protect critical habitat for the Gulf of Maine DPS and makes every effort to engage the public in conservation efforts.

Status

Worldwide, Atlantic salmon populations in single rivers range from thousands to nearly a quarter million. However, some populations are small, numbering in the low hundreds or even single individuals.  

The endangered Gulf of Maine DPS has declined significantly since the late 19th century. Historically, dams, overfishing, and pollution led to large declines in salmon abundance. Because of this, the commercial Atlantic salmon fishery closed in 1948. Improvements in water quality and stocking from hatcheries helped rebuild populations to nearly 5,000 adults by 1985. But more recently, scientists have discovered marine survival and populations have significantly decreased, resulting in annual returns to the United States of generally less than 1,000 adults. The rapid decline and dire status of the ESA-listed Gulf of Maine DPS makes it a priority for NOAA Fisheries and partners to prevent its extinction and promote its recovery.

Protected Status

ESA Endangered

1 distinct population segment

  • Gulf of Maine DPS

Appearance

While in freshwater, young Atlantic salmon—known as “parr”—have brown to bronze-colored bodies with dark vertical bars and red and black spots. These markings camouflage and protect them from predators. Once young salmon are ready to migrate to the ocean, their appearance changes; their vertical barring disappears and they become silvery with nearly black backs and white bellies. When adults return to freshwater to spawn, they are very bright silver. After entering the river, they will again darken to a bronze color before spawning in the fall. After spawning, adults—now called “kelts”—can darken further and are often referred to as “black salmon.” Once adults return to the ocean, they revert to their counter-shaded coloration dominated by silver.

Typically, an Atlantic salmon returning to U.S. waters will be 4 years old, having spent 2 years in freshwater and 2 years at sea. These fish are called “two sea winter fish,” or 2SW, and are usually 28 to 30 inches long and 8 to 12 pounds. The size of adults returning to freshwater from the ocean depends on how long they lived at sea. Young salmon returning to freshwater after 1 year at sea (known as “grilse” or 1SW) are smaller than 2SW adults. Adult salmon can migrate several times to spawn—a reproductive strategy known as iteroparity—though repeat spawners are becoming increasingly rare.

Behavior and Diet

Atlantic salmon are migratory. They travel long distances from the mouths of rivers to the Atlantic Ocean before returning to their natal rivers. For example, U.S. salmon leave Maine rivers in the spring and reach the seas off Newfoundland and Labrador, Canada, by mid-summer. They spend their first winter at sea south of Greenland and their second growing season at sea off the coast of West Greenland and sometimes East Greenland. Maturing fish travel back to their native rivers in Maine to spawn after 1 to 3 years.  

The diet of Atlantic salmon depends on their age. Young salmon eat insects, invertebrates, and plankton. The preferred diet of adult salmon is capelin. Capelin (similar in appearance to rainbow smelt) are elongated silvery baitfish that reach 8 to 10 inches in length.

Where They Live

There are three groups of Atlantic salmon: North American, European, and Baltic. These groups are found in the waters of North America, Iceland, Greenland, Europe, and Russia. Atlantic salmon spawn in the coastal rivers of northeastern North America, Iceland, Europe, and northwestern Russia. After spawning, they migrate through various portions of the North Atlantic Ocean. European and North American populations of Atlantic salmon intermix while living in the ocean, where they share summer feeding grounds off Greenland. The North American group historically ranged from northern Quebec to Newfoundland and to Long Island Sound. This group includes Canadian populations and U.S. populations. In Canada, healthy populations still exist throughout the historical range, but many populations are severely depleted.

Atlantic salmon range

Lifespan & Reproduction

Atlantic salmon have a complex life history and go through several stages that affect their behavior, appearance, and habitat needs. They are anadromous, which means that they are born in freshwater, migrate to the ocean as adults, and then return upriver to spawn.  

When spawning in the fall, the female salmon uses its tail to dig nests in the gravel where the eggs are deposited. These nests are called redds. Over winter, the eggs develop into very small salmon called alevin. In the spring, the alevin swim out of the redd and are then called fry. Fry grow into parr, which are only 2 inches long and are camouflaged to protect them from predators. For 2 to 3 years, the parr grow in freshwater before transforming into smolts in the early spring. The silvery smolts’ gills and organs change, allowing them to swim to the ocean where they spend 1 to 2 years maturing into adults.  

The adult Atlantic salmon, or kelt, returns to the river where it was born to lay eggs. After spawning in freshwater, the kelt can swim back to the ocean and possibly return to spawn again.  

Females returning to spawn after two winters at sea lay an average of 7,500 eggs. Out of these eggs, only about 15 to 35 percent will survive to the fry stage.

Threats

Atlantic salmon populations are exposed to a variety of threats. The most significant threats to their survival include impediments—such as dams and culverts—that block their access to quality habitat, ongoing subsistence fisheries off the shores of Greenland, and changing conditions at sea. Salmon also face many other threats that affect their survival, such as poor water quality, degraded freshwater habitats from land use practices, disease, predation from introduced and invasive species, and interbreeding with escaped fish raised on farms for commercial aquaculture.

Learn more about threats facing the endangered Gulf of Maine population of Atlantic salmon

Marine Survival

Marine survival is the primary driver of population productivity for Atlantic salmon. During years with high marine survival, populations are expected to be robust and to increase, whereas during years of low marine survival, populations are expected to decline. Unfortunately, U.S. Atlantic salmon are currently in a period of persistent, poor marine survival. During the early 1990s, oceanographic changes in the Northwest Atlantic had major impacts on the dynamics of many marine species, including Atlantic salmon. These changes led to significant decreases in marine survival for Atlantic salmon across their North Atlantic range—from Labrador south to the United States. Although the exact reasons for the decrease are unknown, scientists hypothesize that the oceanographic changes altered dynamics up the food chain from primary production to prey fish and even Atlantic salmon. These changes were severe enough to similarly impact the productivity of other marine species (e.g., Atlantic cod, Bluefin tuna, seabirds, marine mammals).

Habitat Impediments

Dams block Atlantic salmon migration paths between rivers and the ocean and can prevent salmon from reaching the habitats needed for spawning and juvenile rearing. Turbines used to generate electricity can kill or injure many salmon as they migrate through dams on their journeys to the ocean. Injuries caused by dams may result in delayed mortality or increase salmon vulnerability to other threats, such as predation by other fish or birds. Dams can also increase the amount of time salmon need to migrate, disrupting their life cycle in the process. These impediments impact river ecosystems by changing river flows, reducing water quality, and changing water temperature. Dams also destroy habitats important to other fish species that salmon have evolved to depend on (e.g., migrating alewives can buffer Atlantic salmon against predation from birds and other fish) and provide habitats for fish species that compete with or prey on Atlantic salmon.  

Habitat Degradation

Land use practices can degrade freshwater habitats necessary for Atlantic salmon survival. For example, forestry, agriculture, and development projects damage or destroy riparian areas that protect streams from erosion. These areas also provide habitat structure, essential nutrients, and forage that salmon depend on in the form of falling trees, leaf litter, and bugs that fall from the forest canopy.   

Pollution

Pollution causes poor water quality that may impact Atlantic salmon. Pollution can reduce the levels of oxygen in the water, making areas unsuitable for salmon survival, and it can deliver chemicals that are toxic to fish or that react with other chemicals to increase toxicity to fish. Pollution also adversely affects Atlantic salmon’s homing abilities and alters the water chemistry, which can impair the salmon’s ability to regulate its own body chemistry. Water quality can affect salmon differently depending on their life stage. For example, juvenile salmon may experience reduced growth, while adults may produce fewer eggs.  

Fish Harvest

Atlantic salmon are threatened by gillnet fisheries, bycatch in recreational fisheries, and poaching. International commercial fishing has been highly restricted since 2002, but this issue has recently become a growing concern. In areas with recreational fishing, fishermen might accidentally or unknowingly catch Atlantic salmon. Even if salmon are released after being caught, they are particularly susceptible to post-release mortality from injury or stress.

Disease

Atlantic salmon can be affected by many pathogens (bacterial, viral, and fungal) found in the wild, which can lead to different diseases. A severe disease outbreak can potentially affect many individuals or an entire year class or life stage within an Atlantic salmon population. Atlantic salmon are also vulnerable to parasites, and there is strong evidence that commercial aquaculture facilities are a primary source of parasites for naturally occurring populations of Atlantic salmon. Best management practices and good fish husbandry have minimized the risks from disease and parasites. In addition, all commercial and federal hatcheries follow strict disease prevention practices. These practices help protect natural and hatchery environments from pathogens. If a disease does break out in a hatchery, managers also take steps to control the spread of the pathogen between hatcheries and river systems.

Aquaculture

Aquaculture, or fish farming, refers to the breeding, rearing, and harvesting of marine plants and animals for public use. Aquaculture of Atlantic salmon provides the world with a healthy food source that would not be available through other means such as a wild fishery. However, commercial aquaculture of Atlantic salmon has well-documented genetic and ecological threats on wild salmon populations. These threats include interbreeding between wild and farmed individuals as well as pathogen and parasite transfers to the wild populations that live near commercial operations. Most fish raised for aquaculture purposes are closely related to their wild counterparts; however, through artificial selection during spawning, the genetic composition of farmed fish is different and less fit than wild populations. If they escape and breed with wild fish, the offspring produced will contain genes from the farmed origin parent and would be less fit for survival in the wild. While producers go to great lengths to make sure farmed fish never enter the environment and interact with wild fish, accidents have happened in the past and may be anticipated in the future. Recent improvements in manufactured gear (net pens and mooring systems) for rearing fish in open ocean environments has decreased the likelihood of escapes. Additional marking of these fish has helped to better understand the causes and helps to minimize these risks. But even with these changes, aquaculture fish still put wild Atlantic salmon at risk.

Scientific Classification

Kingdom Animalia
Phylum Chordata
Class Osteichthyes
Order Salmoniformes
Family Salmonidae
Genus Salmo
Species salar

What We Do

Conservation & Management

NOAA Fisheries is committed to the conservation and recovery of all Atlantic salmon. We have focused our conservation efforts to help rebuild the depleted and endangered population in the Gulf of Maine. Our targeted management actions to secure protections for these fish include:

  • Improving connections between the ocean and freshwater habitats important for salmon recovery.

  • Maintaining genetic diversity of Atlantic salmon populations over time.  

  • Increasing the number of reproducing adults through the conservation hatchery program.

  • Increasing the number of reproducing adults through the freshwater production of smolts.

  • Increasing Atlantic salmon survival by improving our understanding of marine ecosystems and the factors that affect salmon in the ocean.

  • Collaborating with partners and involving interested parties in recovery efforts. 

Learn more about our conservation efforts

Science

Our research projects have discovered new aspects of Atlantic salmon biology, behavior, and ecology and helped us better understand the challenges that all Atlantic salmon face. This research is especially important in rebuilding depleted and endangered populations. Our work includes:

  • Performing stock assessments.

  • Researching marine ecology in West Greenland.

  • Tracking migration survival and ecology in estuaries and coastal oceans.

  • Researching co-evolved fish.

  • Modeling impacts of salmon upstream and downstream dam passage.

Learn more about our research

How You Can Help

Icon showing a fish swimming next to the shore.

Practice Land Stewardship

You can contribute significantly in Atlantic salmon recovery by implementing best management and land stewardship practices.

Maintain forested areas next to rivers and streams to provide shade, nutrients, and cover to support Atlantic salmon and other fish.

Maintain native plants along waterways, which support healthy forests and keep dirt and other materials out of streams. Dirt fills in spaces between rocks that Atlantic salmon use to lay eggs and hide from predators.

Avoid removing wood from Maine waterways and their banks. Wood provides important habitat for Atlantic salmon and other fish to feed and find shelter.

Participate in programs to conserve land and water resources for Atlantic salmon habitats.

Know the Law Before You Fish

It is illegal to fish for, catch, or keep fish from the Gulf of Maine Atlantic salmon DPS.  

Report a Violation

Report a Violation

Call the NOAA Fisheries Enforcement Hotline at (800) 853-1964 to report a federal marine resource violation. This hotline is available 24 hours a day, 7 days a week for anyone in the United States.

You may also contact your closest NOAA Office of Law Enforcement field during regular business hours.


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In the Spotlight

Gulf of Maine Distinct Population Segment of Atlantic Salmon

The Gulf of Maine DPS of Atlantic salmon is one of NOAA Fisheries Species in the Spotlight. This initiative is a concerted, agency-wide effort to spotlight and save the most highly at-risk marine species.

Species in the Spotlight logo.

Atlantic salmon are an iconic species of the Northeast. They once returned by the hundreds of thousands to most major rivers along the northeastern United States, but now only return in small numbers to rivers in central and eastern Maine (Androscoggin to Dennys).

In the 1900s, Atlantic salmon from Maine were so highly valued that, for more than 80 years, the first one caught in the Penobscot River each spring was presented to the U.S. president. The last presidential salmon was caught in May 1992, because there are now too few adult salmon to sacrifice even one.

Atlantic salmon once supported lucrative commercial and recreational fisheries in New England. They were of great cultural and historical importance to Native American tribes in Maine, as well as a source of food. If this iconic species goes extinct, the services it once provided to the American and Native American people will be lost.

The GOM DPS of anadromous Atlantic salmon was initially listed as an endangered species in 2000. A subsequent rule issued by U.S. Fish and Wildlife Service and NOAA in 2009 expanded the geographic range for the GOM DPS to include the Penobscot, Kennebec, and Androscoggin Rivers.

Because of the rapid decline and dire status of the Gulf of Maine DPS, we and our partners have made it a priority to stabilize and prevent extinction of this iconic species.

    Where Gulf of Maine Atlantic Salmon Live

    Young salmon spend 2 to 3 years in the rivers and streams of Maine, then undergo physical changes to prepare them for life in the ocean. Once Gulf of Maine Atlantic salmon leave the fresh waters of Maine rivers, they migrate to the ocean. Some salmon return to Maine after their first winter at sea, but most spend a second year feeding in the Labrador Sea off the southwest coast of Greenland. Most Gulf of Maine salmon return to rivers in Maine after two winters at sea.

    Population Status

    The Gulf of Maine population of Atlantic salmon has declined significantly since the late 19th century. Historically, dams, overfishing, and pollution led to large declines in salmon abundance. Improvements in water quality and stocking from hatcheries helped rebuild populations to nearly 5,000 adults by 1985, but in the early 1990s there was a substantial decrease in marine survival that contributed to a significant population decline. As a result, the average number of salmon returning to GOM rivers annually is only around 1,200.

    Habitat

    Atlantic salmon habitat requirements change throughout their lives. Adult salmon spawn in rivers and lay their eggs in gravel nests. Once salmon eggs hatch into fry, the fry hide from predators in the spaces between gravel. The fry emerge from the gravel after a few months of growth and enter the parr stage. Most parr feed and develop in the river for two to three years before undergoing smoltification, the process in which parr go through physiological changes in order to transition from a freshwater environment to a saltwater marine environment.

    Throughout their lives, Atlantic salmon require the following habitats

    Image
    AtlSalmon_HIllman.jpg
    Atlantic salmon are endangered, with only a few runs remaining in Maine rivers.
    • Parr habitat, often called "nursery habitat," refers to a usually shallow stream area where the water breaks over rocks or gravel and flows quickly. Parr will also congregate around the mouths of small tributaries.

    • Smolt habitat refers to unobstructed riverine and estuarine habitats that allow salmon to physiologically transform to a marine life stage.

    • Marine habitat refers to habitat that Atlantic salmon migrate to after leaving rivers, where they feed heavily and grow rapidly. Marine habit must be disease-free, provide food resources, and have good water quality for salmon to survive.

    • Adult spawning habitat refers to habitat with a gravel bottom where adults can dig nests. Spawning habitats must have diverse pools, riffles, and runs because adults construct nests in locations with plenty of dissolved oxygen.

    Threats

    Dams limit or block salmon access to important habitats in Maine. More than 90 percent of Maine's rivers and streams are affected by dams, which directly kill or injure a significant number of Atlantic salmon on upstream and downstream migrations. Dams also harm important habitats by flooding free-flowing rivers, reducing water quality, and changing fish communities. Finally, dams worsen the effects of climate change by limiting Atlantic salmon's access to cool-water habitats in higher elevation areas in Maine. Of the more than 400 dams along rivers and streams that support wild Atlantic salmon, only 75 have fishways, a structure that allows fish to swim around dams to reach their spawning grounds.

    Image
    750x500-coopersmillsbefore-creditMichaelBurke.jpg
    Coopers Mill Dam in 2016 before dam removal by Atlantic Salmon Federation.

    Gulf of Maine DPS salmon survival in the ocean has decreased over the last 25 years. This means that an increasing number of salmon die in the ocean before they can return to Maine to spawn. Many Atlantic salmon die in the ocean due to predation, starvation, diseases and parasites, and changing ocean conditions. Marine survival is poor throughout the Atlantic Ocean and is affected by both nearshore and open ocean survival rates. This ongoing and significant threat has pushed populations of Atlantic salmon in the United States closer to extinction. The North Atlantic Salmon Conservation Organization leads international efforts to control and better manage foreign fisheries to reduce their impacts on Atlantic salmon born in the United States. Not all causes of low ocean survival are well-known. Threats like climate and ocean changes, plus shifts in predator and prey abundance and distribution, appear to affect salmon survival at sea.

    Species Recovery

    To work toward recovery of these fish, NOAA Fisheries formed a recovery team of scientists and stakeholders to help develop a recovery plan, which was finalized in February 2019. The recovery plan (PDF, 64 pages) builds upon scientific studies and other observations and information sources to identify gaps in our knowledge and the research needed to fill those gaps. The recovery plan also identifies specific criteria that will signal the recovery of these animals.

    Threats with the potential to limit recovery of the Gulf of Maine DPS of Atlantic salmon include:

    • Dams and road crossings
    • Inadequate regulation of dams
    • Low survival rates in the ocean
      Image
      750x500AtlSalmonMilford_MDMR_Screenshot.jpg
      Atlantic salmon coming out of the top of the Milford fish lift on the Penobscot River.
    • Loss of habitat features due to human activity
    • High catch rates in international fisheries
    • Reduced water quantity
    • Reduced water quality
    • Fish harvest
    • Disease
    • Increased number of predators
    • Decreased populations of interconnected fish species
    • Artificial propagation
    • Aquaculture
    • Competition with other fish species
    • Climate change

    We work closely with the Penobscot Indian Nation, the U.S. Fish and Wildlife Service, and the Maine Department of Marine Resources to manage Atlantic salmon cooperatively under the Collaborative Management Strategy for the Gulf of Maine DPS Atlantic Salmon Recovery Program.

    Species in the Spotlight Priority Actions

    In 2016, we published a Species in the Spotlight 5-year action plan for the Gulf of Maine DPS that builds on the recovery plan and details the focused efforts that would be needed over the next 5 years. These actions are:

    • Reconnect Gulf of Maine with headwater streams
    • Increase number of fish entering ocean
    • Reduce fishery mortality in West Greenland
    • Increase understanding of marine survival

    In the first five years of Species in the Spotlight, we have taken important steps toward stabilizing this species and preventing its further decline. Our accomplishments have included activities in several areas:

    Fish Passage

    Image
    tagged-salmon-release-greenland.jpg
    Releasing a tagged salmon off Greenland.
    • Worked with dam owners to make dams safer for migrating salmon
    • Five new fishways planned at hydro dams since 2015

    Habitat Connections

    • 70 aquatic connectivity projects completed in 2018–2019
    • Improved access to approximately 250 miles of streams and rivers

    Reduce Mortality at Sea

    • Negotiated 15 mt catch reduction at West Greenland for 2018–2020
    • Continue work with North Atlantic Salmon Conservation Organization

    Satellite Tagging to Study Migrations

    • Satellite tag project to better understand ocean habitat use and migratory patterns

    We are renewing our Priority Actions plans for 2021–2025.

    2017 Species in the Spotlight Hero Award

    500x500AndyGoode.jpg

    Andy Goode, Vice President of U.S. Programs for the Atlantic Salmon Federation, has been a leader in negotiating dam removals throughout the state of Maine. He was instrumental in negotiating and implementing the Penobscot River Restoration Project. The project removed two mainstem dams on one of the last remaining Atlantic salmon rivers in the United States. Most recently, he successfully negotiated the removal of Coopers Mills Dam on the Sheepscot River.

    Learn more about Andy's work

    2019 Partner in the Spotlight Award

    750x500JohnBanks spotlight partner.jpg

    John Banks has served as the director of the Penobscot Indian Nation's Department of Natural Resources since 1980. John developed and administers a comprehensive natural resources management program for the Tribe. His program advances an integrated management approach that recognizes the interconnectedness of all things in the natural world. He has served on numerous boards, commissions, and delegations. These include the U.S. delegation to the North Atlantic Salmon Conservation Organization(NASCO) and the board of directors for the Penobscot River Restoration Trust.

    Learn more about John's work

    More Information

    • Atlantic Salmon, 5-Year Action Plan (PDF, 17 pages)
    • NOAA Fisheries' Species in the Spotlight Initiative
    • Learning about Atlantic Salmon in Greenland via Satellite Tags
    • Taking Giant LEAPS for Salmon
    • Penobscot River Salmon Run Surges for Second Straight Year

    Management Overview

    The Gulf of Maine DPS of Atlantic salmon is listed as endangered under the Endangered Species Act and is in danger of extinction.  

    In the United States, NOAA Fisheries works to protect all Atlantic salmon. We have specific recovery actions and management strategies for the Gulf of Maine DPS because it is endangered.


    Recovery Planning and Implementation

    Recovery Action

    Under the ESA, NOAA Fisheries must develop and implement recovery plans for the conservation of listed species. The ultimate goal of the plan is to recover the species, with an interim goal of down-listing its status from endangered to threatened.

    The plan recommends the following major actions:

    • Improve connections between ocean and freshwater habitats important for salmon recovery.

    • Maintain genetic diversity of Atlantic salmon populations over time.  

    • Increase the number of reproducing adults through the conservation hatchery program.

    • Increase the number of reproducing adults through the freshwater production of smolts.

    • Increase Atlantic salmon survival by improving our understanding of marine ecosystems and the factors that affect salmon in the ocean.

    • Consult with all involved tribes on a government-to-government basis.

    • Collaborate with partners and involve interested parties in recovery efforts.

    Learn more about the recovery plan for the Gulf of Maine DPS of Atlantic salmon

    Implementation

    The ESA authorizes NOAA Fisheries to appoint recovery teams to help develop and implement recovery plans. There is an action team for each major recovery program element. The action teams develop implementation plans, review project proposals, find and address areas of policy or scientific disagreement, and coordinate to implement and monitor recovery actions.

    The NOAA Fisheries Greater Atlantic Regional Fisheries Office and the Northeast Fisheries Science Center work cooperatively with the U.S. Fish and Wildlife Service, Maine Department of Marine Resources, and Penobscot Indian Nation to recover Atlantic salmon.

    In February 2019, we published a final recovery plan for the Gulf of Maine DPS. We will continue to involve stakeholders in this priority species initiative as we implement the plan's key strategies for preventing extinction over the coming years.

    benefits of salmon conservation

    Atlantic salmon conservation helps to build resilient fisheries, expand recreational opportunities, and support communities. 

    Collaborative Management Strategy for the GoM DPS Atlantic Salmon Recovery Program

    The pilot Collaborative Management Strategy (CMS), as introduced at the 2020 Atlantic Salmon Ecosystem Forum, is now fully implemented. The change in management strategy was not a decision we took lightly, and did so only after many years of review. While we extol the virtues of adaptive management, it is extremely difficult to depart from the status quo and make a change. The decade-long review of our "Framework" structure prompted us to approach the salmon restoration program from a slightly different angle. While the overarching goal of Atlantic salmon recovery and de-listing has not changed, the governance structure has.

    The purpose of the revised governance structure is to:

    1. Ensure that recovery of the Gulf of Maine DPS as defined in the final listing rule is achieved in accordance with the Final Recovery Plan (2019);
    2. Ensure transparency and accountability in decision making;
    3. Ensure that decisions are guided by the best available science;
    4. Help ensure that resources are made available to implement recovery actions and recovery activities as described in the Final Recovery Plan and SHRU (Salmon Habitat Recovery Unit) specific work-plans;
    5. Serve as dispute resolution and continuity of operations throughout the operational year; 
    6. Ensure horizontal and vertical communication among the agencies and the various organization levels within the agencies; 
    7. Assist federal agencies in delivering on trust responsibilities to federally recognized tribes, and 
    8. Provide opportunity for stakeholder engagement and venue for providing input and recommendations.
    The CMS requires the individual SHRU Teams to develop annual reports and make them available to the public.  Standing (FERC) and Ad Hoc Committees (Fish Passage Operations and Broodstock Collection, and Emergency Stocking)  are also required to report out annually. The goal of the annual reports are to summarize progress toward achieving recovery goals for each SHRU.


    Species Recovery Contacts

    Julie Crocker, Endangered Species Act Fish Recovery Coordinator, (978) 282-8480 

    Dan Tierney, Atlantic Salmon Recovery Coordinator, (207) 866-3755

    Critical Habitat Designation

    Once a species is listed under the ESA, NOAA Fisheries evaluates and identifies whether any areas meet the definition of critical habitat. Those areas may be designated as critical habitat through a rulemaking process. The designation of an area as critical habitat does not create a closed area, marine protected area, refuge, wilderness reserve, preservation, or other conservation area; nor does the designation affect land ownership. Federal agencies that undertake, fund, or permit activities that may affect these designated critical habitat areas are required to consult with NOAA Fisheries to ensure that their actions do not adversely modify or destroy designated critical habitat.

    In 2009, we designated specific freshwater and estuarine areas in Maine as critical habitat for Atlantic salmon. We designated these areas because they contain features that are essential for Atlantic salmon survival. These areas provide important spawning, feeding, and migratory habitats for Atlantic salmon.    

    View the Atlantic salmon Gulf of Maine DPS critical habitat map.

    Any federal agencies conducting or permitting projects that may affect Atlantic salmon or adversely modify their critical habitat must consult with us, as required by Section 7 of the Endangered Species Act. 

    Learn more about the endangered species consultations in the Greater Atlantic Region 


    Conservation Efforts

    Habitat Restoration and Fish Passage

    Atlantic salmon need a wide range of well-connected habitat types. In freshwater, dams and other barriers to migration block salmon from important spawning and nursery habitats. The Gulf of Maine DPS of Atlantic salmon has access to only 8 percent of its historical freshwater habitat.

    NOAA Fisheries is working with dam owners to find solutions that will allow salmon to recover. We have provided significant resources ($22.5 million) for the oversight, funding, and monitoring of two dam removals on the Penobscot River. The Penobscot River is home to about 75 percent of the adult Atlantic salmon in the United States, so restoring access to this river is particularly important. We also supported 35 other fishway constructions and dam removal projects in Maine, including the removal of two major hydroelectric dams. In 2019, biologists counted more than 1,000 Atlantic salmon at the Milford Dam fish lift in Milford, Maine.

     

    NOAA Fisheries staff continue to work with hydropower owners to plan for effective downstream and upstream fish passage at most major hydropower dams within the designated critical habitat area for Atlantic salmon. The goal is to restore Atlantic salmon access to important habitats so they can complete their migration.

     

    In the Penobscot River basin alone, there are still more than 130 dams that block access to about 90 percent of salmon's historical spawning and nursery habitat. There is still much work to be done.

    Learn more about the Penobscot River Restoration Project

    benefits of salmon restorration

    Salmon restoration benefits the ecosystem as a whole by reconnecting rivers to the ocean,  improving fresh water habitat, and building resilient ecosystems.

    Captive Breeding and Stocking Programs

    Hatchery programs have allowed Atlantic salmon to survive during times when many of Maine's rivers were not suitable for salmon survival. They also allowed an economically important recreational fishery to operate through the early 1990s.  

    The U.S. Fish and Wildlife Service currently has two hatcheries in Maine that conduct a conservation hatchery program. This is a river-specific stocking program, meaning that the program releases the offspring of individuals collected from a specific river back into that river. The program aims to increase the size of wild and captive river-specific populations and to have a reserve of captive salmon in case wild salmon stop returning to their native habitats.  

    The hatchery program will continue to support conservation activities, including spawning, stocking, and brood collection in several rivers. It will also keep captive brood populations for the Gulf of Maine for as long as needed.

    Producing Young Salmon

    Producing many smolts is the main safety net for Atlantic salmon during times when few salmon survive in the ocean. NOAA Fisheries aims to get more smolts, or young salmon, successfully out of rivers and into the ocean.  

    In the short term, smolt production could increase by changing hatchery and stocking practices. For example, researchers could target habitats that do not currently have any salmon. This can help offset the population decrease caused by ongoing threats.  

    International Cooperation

    NOAA Fisheries aims to increase marine survival, which will also increase the number of healthy adults returning to U.S. rivers. We will do so by reducing the effects of human activities on migratory smolts. This will include minimizing potential effects of construction on Atlantic salmon migration success and protecting marine habitats through coastal zoning and planning.

    International fisheries, such as those in Greenland, can catch salmon born in the United States. The North Atlantic Salmon Conservation Organization sets catch limits and licensing requirements for fisheries in Greenland. Canada, Denmark, the European Union, Norway, the Russian Federation, and the United States are members of NASCO and work together to manage Atlantic salmon throughout their range. NASCO also works to reduce the Greenland fishery's impact on U.S.-origin fish.


    Key Actions and Documents

    Actions & Documents Incidental Take

    Atlantic Salmon 5-Year Review

    In 2017, NMFS announced the initiation of a 5-year review for the Gulf of Maine Distinct Population Segment (DPS) of Atlantic Salmon (Salmo salar). NMFS is required by the Endangered Species Act (ESA) to conduct 5-year reviews to ensure that the…
    • Notice of Initiation of a 5-Year Review (82 FR 28049, 6/20/2017)
    • Atlantic Salmon 5-Year Review (2020)
    Notice
    ,
    New England/Mid-Atlantic
    Published
    November 23, 2020

    Critical Habitat for the Gulf of Maine DPS of Atlantic Salmon

    We, NOAA Fisheries, issue a final rule designating critical habitat for the Atlantic salmon (Salmo salar) Gulf of Maine Distinct Population Segment (GOM DPS). We previously determined that naturally spawned and several hatchery populations of Atlantic…
    • Final Rule (Correction; 74 FR 39903, August 10, 2009)
    • Final Rule (74 FR 29300, June 19, 2009)
    • Proposed Rule (73 FR 51747, September 5, 2008)
    • Atlantic Salmon Gulf of Maine DPS Critical Habitat Map and GIS Data
    Final Rule
    ,
    New England/Mid-Atlantic
    Effective
    July 20, 2009

    Listing Gulf of Maine DPS of Atlantic Salmon Under the ESA

    We (NOAA Fisheries and U.S. Fish and Wildlife Service, collectively referred to as the Services) have determined that naturally spawned and conservation hatchery populations of anadromous Atlantic salmon (Salmo salar) whose freshwater range occurs in…
    • Final Rule to Expand DPS (74 FR 29344)
    • Proposed Rule to Expand DPS (73 FR 51415)
    • Notice of Availability of Status Review (71 FR 55431)
    • Original DPS Final Rule (65 FR 69459)
    • Status Review (2006)
    Final Rule
    ,
    New England/Mid-Atlantic
    Effective
    July 20, 2009

    Incidental Take Permit to Midwest Biodiversity Institute

    The requested permit would be for the incidental take of ESA-listed shortnose sturgeon (Acipenser brevirostrum), Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) and Atlantic salmon (Salmo salar). The takes would be attributed to otherwise lawful…
    • Notice of Issuance (85 FR 83522, 12/22/2020)
    • Receipt of Application (85 FR 21413, April 17, 2020)
    • Final Permit (PDF, 6 pages)
    • Permit application
    Notice
    ,
    New England/Mid-Atlantic
    Published
    12/22/2020

    More Information

    • Taking Giant Leaps for Salmon
    • International Year of the Salmon (2019)
    • Atlantic Salmon Recovery: It Takes an Ecosystem
    • Working Group on North Atlantic Salmon
    • North Atlantic Salmon Conservation Organization

    Science Overview

    Co-Evolved Fish

    The health of Atlantic salmon is directly affected by the health of their ecosystem, which includes the other species living in that ecosystem. Atlantic salmon co-evolved and historically shared the rivers of Maine with many other fish that provide alternative food sources for salmon predators and the salmon themselves. Co-evolved fish also influenced the amount of nutrients available and the habitat quality. Our scientists study how changes in co-evolved fish populations affect the recovery of Atlantic salmon.

    Smolt Dam Passage

    Salmon are famous for fighting their way upstream to spawn, but their trip downstream as young smolts is no less important. Our scientists study how passage through or around dams affects smolts. Scientists surgically implanted tags into 941 smolts in the Penobscot River between 2005 and 2013. Each tag emits a sound unique to the fish carrying it. Receivers then pick up the sound as the fish travels down the river to track its progress.  

    This research reveals that even if smolts make it past the dams, they might suffer injuries that make them more likely to die days or weeks later in the estuary, where the river meets the sea. And for each dam a smolt passes, researchers found that the smolt’s chance of dying in the estuary increases by 6 to 7 percent.

    Learn more about how making dam passage safer for smolts can help the recovery of the species

    Water Chemistry

    Atlantic salmon live in and migrate through freshwater streams and rivers, estuaries, coastal waters, and the North Atlantic Ocean. They thus need different water chemistry conditions at different stages in their life. Young salmon are especially sensitive to the amount of acid and aluminum in streams. Our scientists studied the effects of acid and aluminum levels on two juvenile life stages of Atlantic salmon. They found that increases in acidity can injure salmon and even increase the chance that they will die.

    Genetic Diversity

    NOAA Fisheries is genetically monitoring Atlantic salmon to make sure that salmon born in hatcheries can survive in the wild. We also want to make sure that wild salmon are genetically diverse. This information will help us monitor the recovery of the Gulf of Maine DPS and create best practices for hatchery management.  

    Disease Surveys

    Our scientists study the parasites, bacteria, and viruses that can affect Atlantic salmon health. Populations that are already threatened are especially vulnerable to disease, so it is important to understand how disease could affect the Gulf of Maine DPS. Scientists have sampled several fish species for disease, including cod, eel, halibut, mackerel, trout, smelt, and flounder. Since 2000, scientists have sampled over 5,000 fish representing 23 species. These 23 species can all interact with Atlantic salmon in shared habitats. Collaborative efforts will help improve our understanding of diseases and our ability to prevent and manage disease outbreaks. 

    Stock Assessments

    Determining the number of salmon in the Gulf of Maine DPS—and whether the population is increasing or decreasing over time—helps resource managers assess the success of enacted conservation measures. Our scientists collect information and present these data in annual stock assessment reports. 

    Research & Data

    Recovery Action Database

    Tracks the implementation of recovery actions from Endangered Species Act…
    February 10, 2020 - Database ,
    National
    View More

    More Information

    • Atlantic Salmon Ecosystems Research Team
    • U.S. Fish and Wildlife Service Northeast Fishery Center
    • Atlantic Salmon Smolts Survive the Dam but Die Downstream
    • Protecting Endangered Atlantic Salmon in New England

    Recent Science Blogs

    Research

    Newly Tagged Atlantic Salmon Now Roam the Ocean Collecting Critical Migration Data

    Research
    Greenland-ice-sheet-tongue-750x500.jpg
    Research

    New England Moxie Pays Off—Seven Atlantic Salmon Tagged So Far

    Research
    Greenland-sunrise-over-town-750x500.jpg
    Research

    Trolled by Weather and Elusive Atlantic Salmon

    Research
    TimSheehan-WaitingForABite-Greenland-750x500.jpg
    View More

    Documents

    Document

    Atlantic Salmon 5-Year Review

    A 5-year review is a periodic analysis of a species’ status conducted to ensure that the listing…

    Document

    Atlantic Salmon Assessments

    The U.S. Atlantic Salmon Assessment Committee monitors the population status of U.S. Atlantic…

    New England/Mid-Atlantic
    Document

    Recovery Plan (2019) for the Gulf of Maine Distinct Population Segment of Atlantic Salmon (Salmo salar)

    The goal of this 2019 recovery plan is the removal of the Gulf of Maine DPS of Atlantic salmon from…

    New England/Mid-Atlantic
    Document

    Species in the Spotlight: Priority Actions 2016-2020, Atlantic Salmon

    In 2015, NOAA Fisheries announced a new program to focus and redouble our efforts to protect eight…

    New England/Mid-Atlantic
    More Documents

    Data & Maps

    Data

    Recovery Action Database

    Tracks the implementation of recovery actions from Endangered Species Act (ESA) recovery plans.

    National
    Map

    Atlantic Salmon Gulf of Maine DPS Boundaries

    New England/Mid-Atlantic
    Map

    Atlantic Salmon Critical Habitat - Gulf of Maine DPS

    New England/Mid-Atlantic
    More Data and Maps

    Research

    Peer-Reviewed Research

    Atlantic Salmon Ecosystems Research Team Publications

    Publications related to the research by the Atlantic Salmon Ecosystem Research Team in support of…

    New England/Mid-Atlantic
    More Research

    Outreach & Education

    Educational Materials

    Sea-Run,Go! Wild Atlantic Salmon

    In this lesson students will use the Agents of Discovery™ app on their mobile devices to learn…

    New England/Mid-Atlantic
    More Outreach and Education Materials
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