North Atlantic right whale monitoring and research activities
We monitor North Atlantic right whales to better understand where they go and what they do while in our waters. This information helps to inform measures we take to protect this endangered species. We do this work in collaboration with other government departments and non-governmental organizations.
For the most up-to-date information on North Atlantic right whale sightings and detections, visit Whale Insight. This interactive map integrates and displays whale sightings and acoustic detections from multiple sources in Atlantic Canada and Quebec onto a single online platform.
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Our monitoring and surveillance activities
In some areas of the Northwest Atlantic Ocean, North Atlantic right whales spend most of their time underwater and can be highly mobile. They are known to travel up to 80 kilometres in 1 day in the Gulf of St. Lawrence. This can make it difficult to observe the whales from the air or on the water. Our ability to visually detect them depends on:
- whale movements
- whale behaviour
- weather and ocean conditions
Similarly, our ability to acoustically detect right whales depends on:
- where they are in relation to our listening devices
- whether or not they are calling
- ocean conditions
We monitor and detect right whales using:
- aerial surveillance
- at-sea surveillance
- acoustic technology
Visual sightings and acoustic detections of right whales that are reported in near real-time and validated by trusted sources will trigger the North Atlantic right whale fisheries and vessel management measures where applicable in Canadian waters.
Aerial surveillance
Aerial surveillance is our primary means for detecting right whales in Atlantic Canada and Quebec. From the aircraft, our marine mammal observers look for whales that are at the surface of the water. If right whales are observed, the marine mammal observer:
- counts them
- notes their condition
- takes photos of them whenever possible
- records the time, ocean conditions, and the location of the sighting
The location and timing of each sighting are uploaded to Whale Insight and the sighting may result in management measures being put in place to protect them.
Fisheries and Oceans Canada operates aircraft that fly several times a week, weather permitting, over Atlantic Canadian waters, including over the Gulf of St. Lawrence, in search of North Atlantic right whales.
The objectives of the flights are to:
- conduct scientific surveys in various areas to better understand right whale distribution and abundance
- monitor whale presence around active fisheries
- monitor any fishery closure areas to ensure compliance with the law
Aircraft from Transport Canada's National Aerial Surveillance Program monitor designated shipping zones and certain areas of the Gulf of St. Lawrence.
At-sea surveillance
Our marine mammal observers also help monitor North Atlantic right whales by conducting surveys from ships at sea. These observations often take place aboard Canadian Coast Guard vessels, where trained experts watch for whales and collect important data to support conservation efforts. When they are, they visually scan the water in a predetermined way to look for whales that are at the surface of the water. They confirm the species of whales and number of individuals with binoculars as necessary, in addition to taking photos, noting their condition and recording the time, ocean conditions, and the location of the sighting.
Acoustic technology
Hydrophones are underwater microphones that can be used to detect whale calls 24 hours a day, 7 days a week. Passive acoustic monitoring systems are equipped with hydrophones which can be attached to the sea floor, mounted onto surface buoys, deployed from a vessel, or mounted onto mobile gliders.
Depending on ocean conditions, passive acoustic monitoring systems can detect the presence of whales that are tens of kilometers away. Currently, they cannot provide the exact location, number of whales, or differentiate the call of one individual whale from another. However, they can tell us that there is at least one whale calling within the detection range of the hydrophone.
We use both archival and near real-time passive acoustic monitoring systems to detect right whales. Archival passive acoustic monitoring systems listen and record whale calls for several months before they are retrieved and analyzed. This helps us to better understand right whale distribution throughout the year in Canadian waters. Near real-time passive acoustic monitoring systems transmit detections over satellite or cellular tower systems to marine mammal experts for validation in near real-time.
Near real-time acoustic technology: Viking buoys
Viking buoys are scientific buoys equipped with sensors that collect information on ocean and weather conditions. This information helps to validate and interpret data from satellites and enables us to follow oceanographic conditions in near real-time.
Our researchers have mounted hydrophones onto 9 Viking buoys in the Gulf of St. Lawrence. These hydrophones transmit right whale calls in near real-time to a team of marine mammal acoustic experts for validation. Detections are displayed on Whale Insight.
Near real-time acoustic technology: Gliders
Gliders are autonomous, underwater vehicles equipped with sensors to monitor and collect information on ocean conditions. They can travel long periods of time and into less accessible areas of the ocean.
DFO has a fleet of 4 gliders equipped with hydrophones that are deployed in Eastern Canadian waters to detect North Atlantic right whales in near real-time. In addition to these gliders, Transport Canada continues to partner with the University of New Brunswick and Dalhousie University on the deployment of gliders equipped with hydrophones to detect right whales in the Gulf of St. Lawrence, including areas like the Laurentian Channel and Cabot Strait. As with Viking buoys, this is the fourth year that glider detections will help inform North Atlantic right whale management measures.
Our research activities
We survey and monitor right whales and their food sources to better understand whale distribution, movements, behaviours, and the environmental stressors that are affecting them. All of this research informs how we protect them with fisheries and shipping management measures and the strategies we implement to help their recovery as an endangered species. Scientific work on identification, counting of individual right whales, and necropsies are done in collaboration with our partners.
We provide scientific advice on key aspects of North Atlantic right whale ecology, including their arrival timing and distribution in Canadian waters. This information supports fishery management decisions, species recovery efforts, and strategies to reduce environmental stressors.We recently published a large body of research on our understanding of North Atlantic right whales in Canadian waters. This was called a Recovery Potential Assessment and is a process used to synthesize the most recent scientific information on a species at risk in order to update recover documents, like the Recovery Strategy.
This includes 11 papers:
- The southern Gulf of St. Lawrence as foraging habitat for the North Atlantic right whale
- Describing the seasonal and spatial distribution of Calanus species and North Atlantic right whale potential foraging habitats in Canadian waters using species distribution models
- End-of-century projections of Calanus species biomass in the Gulf of St. Lawrence, southern Newfoundland, Scotian Shelf and northeast Gulf of Maine
- Threat assessment for the critically endangered North Atlantic right whale (Eubalaena glacialis)
- Distribution and abundance of North Atlantic right whales, Eubalaena glacialis, in eastern Canada from line-transect surveys from 2017 to 2022
- A Species Distribution Modeling Approach based on DFO aerial survey observations from 2017 to 2022 to understand North Atlantic Right Whale Habitats in the Estuary and Gulf of St. Lawrence
- North Atlantic right whales in Newfoundland and Labrador waters, based on calls and opportunistic sightings
- Acoustic occurrence of North Atlantic right whales (Eubalaena glacialis) from 2017-2022 off Nova Scotia, Canada.
- Time-space distribution of North Atlantic Right Whale in Gulf of St-Lawrence from acoustic monitoring between 2010 and 2022
- Important Habitats of the North Atlantic Right Whale (Eubalaena glacialis) in Eastern Canadian Waters
- Recovery Potential Assessment for the endangered North Atlantic right whale (Eubalaena glacialis) in Canadian Waters
Identifying and counting North Atlantic right whales
When a North Atlantic right whale is sighted in Canadian waters by one of our marine mammal observers, whether by air or at sea, they take photos of its features and markings whenever possible. All photos taken by DFO or submitted to DFO are catalogued, given a preliminary ID, then sent to the New England Aquarium—which maintains the North Atlantic right whale catalogue—to validate the IDs and include it into the sighting history of each individual NARW.
Necropsies
When a North Atlantic right whale death is reported, steps are taken to determine if a necropsy is warranted and if the carcass can be towed to shore for analysis. Tagging the carcass helps to track where the carcass is drifting and informs where to find it later for towing or sampling purposes. Decisions to tag a carcass or conduct a necropsy depend on factors such as:
- state of decomposition
- weather and ocean conditions
- availability of a suitable necropsy site and staff
Through DFO's Marine Mammal Response Program, we work closely with marine mammal response partners and veterinarians from the University of Prince Edward Island and the Université de Montréal to conduct necropsies and/or other sampling methods. Marine mammal necropsies are the primary method for researchers to inspect the carcass and collect samples to analyze and determine how and why the whale died. The information contributes to our overall understanding of right whales and the threats affecting them which helps to inform how they can be protected.
Science advice and research
- Large circular hydrophone arrays for long-range monitoring of North Atlantic right whales : first deployments and testing in the Gulf of St. Lawrence
- North Atlantic right whale abundance, demography and residency in the southern Gulf of St. Lawrence derived from directed aerial surveys
- Updated information on the distribution of the endangered North Atlantic right whale in Canadian waters
- A mechanistic approach to predicting suitable foraging habitat for reproductively mature North Atlantic right whales in the Gulf of St. Lawrence
- Significance of dominant zooplankton species to the North Atlantic right whale potential foraging habitats in the Gulf of St. Lawrence: a bio-energetic approach
- Review of North Atlantic right whale occurrence and risk of entanglements in fishing gear and vessel strikes in Canadian waters
- Science advice on timing of the mandatory slow-down zone for shipping traffic in the Gulf of St. Lawrence to protect the North Atlantic right whale
- Recovery potential assessment for right whale (western North Atlantic population)
- Performance study of passive acoustic systems for detecting North Atlantic right whales in seaways: the Honguedo strait in the Gulf of St. Lawrence
- Optimal passive acoustic systems for real-time detection and localization of North Atlantic right whales in their feeding ground off Gaspé in the Gulf of St. Lawrence
Latest right whale detections
Other research
- Oceans Protection Plan: Preserving and restoring marine ecosystems
- Underwater Noise: Marine Environment Quality Projects
- Whale Detection and Collision Avoidance Initiative
- smartWhales Initiative
- Whale Science for Tomorrow
Management measures
Species information and recovery measures
- North Atlantic right whale species information
- North Atlantic right whale: recovery strategy
- Action Plan for the North Atlantic right whale in Canada
Review for recovery potential and effectiveness
- North Atlantic right whale summary report
- Report on the Progress of Recovery Strategy Implementation for the North Atlantic Right Whale (Eubalaena glacialis) in Canadian Waters for the Period 2009-2014
- Review of the effectiveness of recovery activities for North Atlantic right whales
- Engagement on the science-based whale review
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