International recognition of iconic whale and dolphin paradises of the South 
American Atlantic coast

The IMMA Secretariat of the IUCN Marine Mammal Protected Areas Task Force is 
pleased to announce that this week 33 new Important Marine Mammal Areas (IMMAs) 
have been identified and put on the map in the South West Atlantic Ocean from 
the Guianas, north of the Brazilian Amazon, to the tip of Tierra del Fuego, 
Argentina. This is the final result from a year-long process, including an 
intensive week-long scientific workshop last December with 31 of the region’s 
scientists gathering data on candidate IMMAs which were then submitted for peer 
review. Besides the 33 newly approved IMMAs, 5 areas have been assigned Area of 
Interest (AoI) status.

IMMAs are defined as discrete portions of habitat, important to marine mammal 
species, that have the potential to be delineated and managed for conservation. 
They are not legal designations but independent, peer-reviewed assessments 
based on a set of criteria supported by data.

“We welcome this global recognition of our iconic marine treasures off the east 
coast of South America,” said José Truda Palazzo, Jr. from the Instituto Baleia 
Jubarte (Humpback Whale Institute) which hosted the December workshop in Praia 
do Forte, Brazil.  The region’s notable habitats for marine mammals include 
Abrolhos Bank and Fernando de Noronha islands off Brazil as well as the Straits 
of Magellan and Patagonian waters of Península Valdés in Argentina and the 
Paramaribo River in Suriname, among others.

“For the past few decades we have intensified our research into the region’s 
rare, endemic, threatened marine mammals,” added Miguel Iñíguez from Fundación 
Cethus and Whale and Dolphin Conservation, based in Argentina.

The South West Atlantic Ocean (SWATLO) region features southern right whales 
(Eubalaena australis), humpback whales (Megaptera novaeangliae) and sei whales 
(Balaenoptera borealis), some of which travel from Antarctica to this region. 
Besides the prevalent spinner (Stenella longirostris) and common bottlenose 
dolphins (Tursiops truncatus), there are species endemic to the region 
including the Commerson’s dolphin (Cephalorhynchus commersonii ssp. 
commersonii), the vulnerable franciscana (Pontoporia blainvillei), the 
vulnerable Lahille’s bottlenose dolphin (Tursiops truncatus ssp. gephyreus) and 
the near threatened Guiana dolphin (Sotalia guianensis). The vulnerable West 
Indian manatee (Trichechus manatus) is found along the coasts of the Guyanas 
and northeastern Brazil.

The week-long IMMA workshop, held in Praia do Forte, Brazil, in December 2022, 
was organized and run by the IMMA Secretariat of the IUCN Task Force on Marine 
Mammal Protected Areas, and hosted by Instituto Baleia Jubarte. Workshop 
participants started by considering 112 preliminary areas of interest (pAoI). 
The pAoI selected to advance to candidate IMMAs were defended with text 
supporting various criteria based on scientific evidence and detailed mapping 
along with a strong rationale for the boundaries chosen. The review and mapping 
of these areas is now complete.

The results from the Brazilian workshop mean there are now 242 IMMAs globally, 
each with portfolios, maps and other background information on the IMMA e-Atlas.

According to Task Force co-chairs Giuseppe Notarbartolo di Sciara and Erich 
Hoyt, the IMMA team along with 267 marine mammal scientists have now examined 
72% of the ocean, 13% of which are IMMAs, and are hoping in the next 4-5 years 
to complete the decade-long global scientific assessment of the habitats of the 
133 marine mammal species. In the meantime, the IMMA work continues to forge 
ahead in the North East Atlantic with final results due by early 2024 and the 
North West Atlantic and Caribbean, with a workshop planned for May 2024 and 
final results to be released no later than early 2025.
 
More information on the project:

• The South West Atlantic IMMA region comprises approximately one quarter of 
the Atlantic Ocean. The Task Force has now examined 72% of the global ocean for 
IMMAs. IMMAs amount to 13% of the examined area. The total surface area for all 
242 IMMAs is 33.3 million square kilometers.

• The global total of IMMAs now stands at 242, as well as 30 candidate IMMAs 
and 157 areas of interest (AoI). The e-Atlas showing maps of all the IMMAs and 
Aoi identified to date is here: https://www.marinemammalhabitat.org/imma-eatlas/

• Area of Interest or AoI status is not as strong as IMMA status but it is 
valuable in terms of facilitating and focusing future monitoring and research 
activities on marine mammals in the region which may in future help turn it 
into an IMMA.

• The IMMA initiative is a partnership between the IUCN Joint SSC-WCPA Marine 
Mammal Protected Areas Task Force, Tethys Research Institute and Whale and 
Dolphin Conservation (WDC). A recent paper in Frontiers in Marine Science 
details the Task Force IMMA work (2016-2022): 
https://www.marinemammalhabitat.org/download/the-important-marine-mammal-area-network-a-tool-for-systematic-spatial-planning-in-response-to-the-marine-mammal-habitat-conservation-crisis/

• The work of the Task Force for its IMMA initiative has been financed mainly 
by the International Climate Initiative (IKI) of the German Federal Ministry 
for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) as 
part of the Global Ocean Biodiversity Initiative (GOBI). Individual regions 
have been funded by the French Biodiversity Agency through the IUCN Marine and 
Polar Programme and by the Mava Foundation. Funding in the preparatory stages 
came from the Animal Welfare Institute and Pacific Life Foundation. Additional 
funding for the South West Atlantic IMMA region came from OceanCare both in 
preparation for the IMMA work as well as for the workshop itself. The Brazilian 
Instituto Baleia Jubarte (Humpback Whale Institute) hosted the workshop and 
provided additional financial support for local expenses and airport transfers 
as well as providing their venue for the opening session.

• This news release and a final report on the South West Atlantic Ocean IMMA 
region are available for free download on the marinemammalhabitat.org website.

To download the South West Atlantic IMMA report, go to 
https://www.marinemammalhabitat.org/resources/documents/

To obtain shapefiles and detailed background information for the 242 approved 
IMMAs, go to 
https://www.marinemammalhabitat.org/immas/imma-spatial-layer-download/

For more information, story leads, contacts and media use of photos and maps, 
contact Erich Hoyt, erich.h...@imma-network.org

— Erich Hoyt
Co-chair, IUCN Marine Mammal Protected Areas Task Force
— Giuseppe Notarbartolo di Sciara
Co-chair, IUCN Marine Mammal Protected Areas Task Force
— Gill Braulik
Deputy chair, IUCN Marine Mammal Protected Areas Task Force
 
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