June 15, 2022 — A review of 20 years of data tracking the highly endangered north Atlantic right whale shows the population has shifted its feeding and migration patterns significantly, as sea temperatures in the Gulf of Maine warm with climate change.
The findings show that government-enforced protections for right whales – already requiring restrictions on vessel speed limits and fishermen’s lobster and fish trap lines and buoys – will need to be adjusted as the whales shift their movements and habitats.
After two decades of warming waters in the Gulf of Maine, right whales – a population now estimated at just 336 animals at risk from ship strikes and entanglements in fishing gear – are relying much more on Cape Cod Bay as their food supply has changed.
“The time of year when we are most likely to see right and humpback whales in Cape Cod Bay has changed considerably, and right whales are using the habitat much more heavily than they did 20 years ago,” said Dan Pendleton, a research scientist at the New England Aquarium’s Anderson Cabot Center for Ocean Life, in a summary issued by the aquarium. Pendleton is lead author of the study and its team of whale scientists in the U.S. and Canada.