North Atlantic right whale researchers on both sides of the border are expressing cautious optimism following an increase in the number of newborn calves this year. A total of 23 calves were born during the calving season from November to April off the southeastern U.S., marking the highest count since 2009.
Amy Warren, a scientific program officer at the New England Aquarium’s Anderson Cabot Center for Ocean Life, described the 23 calves as a hopeful sign, emphasizing the importance of their survival into adulthood to contribute to the endangered population. Currently, there are only 380 North Atlantic right whales remaining worldwide, as per the latest official estimate from 2024.
The decline in calving numbers over the past decade has been a concern, with an average of 10 to 15 new calves annually compared to 20 calves per year two to three decades ago. The absence of known calves in 2018 underscored the challenges faced by the species.
Researchers attribute the rise in calf births this year to various factors, including the health of the mothers, which is influenced by their access to food. North Atlantic right whales predominantly feed on specific plankton, but changes in climate have led to the displacement of their food sources further north, leaving the whales without sufficient nourishment in their calving areas off Florida and Georgia.
In addition to food availability, human-induced stressors like ocean noise, ship traffic, and entanglement in fishing gear also impact the whales’ health. Conservation efforts in both Canadian and U.S. waters have been implemented to mitigate these threats, such as fishery closures and speed limits for marine vessels.
Notably, some mothers showed a shorter time gap between successive births this year, indicating improved reproductive health among the whales. While the birth rate this year is encouraging, researchers stress the need for sustained growth in the population to counter the species’ decline effectively.
The recent detection of North Atlantic right whales in the Gulf of St. Lawrence for the first time this year offers a glimpse of hope for their future. Moving forward, experts underscore the importance of continuous monitoring and conservation efforts to ensure the long-term survival and recovery of this critically endangered species.
