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Along the way, the whales face dangers including ship strikes and entanglement in commercial fishing gear. °µÍø½ûÇøal groups have long faulted the U.S. and Canadian governments for not doing enough to protect the critically endangered animals.

Canada is enforcing mandatory protection measures for the whale this summer, Transport Canada said in a June 27 statement. All vessels of 42.7 feet (13 meters) in length or more must comply with speed restrictions in designated areas of the ocean to avoid whale strikes, the agency said.

Transport Canada said it is also requesting voluntary slowdowns in other parts of the ocean. The restrictions reflect the agency's commitment “to the protection and conservation of endangered North Atlantic right whales,� the agency said.

“Transport Canada has been taking action to help protect this iconic species from vessel collisions in the Gulf of St. Lawrence, a high-traffic area where right whales are often seen,� the statement said.

The restrictions are being enforced at a time when scientists are voicing concern about a . The New England Aquarium in Boston said earlier this year that this year's calving season produced only 11 mother-calf pairs. U.S. government authorities have said the whales need to have at least 50 calves per season to start recovering the population.

The U.S. government decided earlier this year to that would have required more ships to slow down in East Coast waters to spare the whale. The move came in the final days of President Joe Biden's administration and federal ocean managers said there was no way to implement the rules before President Donald Trump took office in January.

The whale was once abundant off the East Coast, but it was decimated long ago during the commercial whaling era. It has been protected by the U.S. Endangered Species Act for decades, but has been slow to recover.