May 21, 2019 — With the count of North Atlantic right whale sightings in Cape Cod Bay down to zero Thursday, the end-of-season findings by the Center for Coastal Studies indicate what could be new realities: More animals are showing up each year, and the length of time they’re staying in the bay is longer.
“There are two trajectories,” said Charles “Stormy” Mayo, the center’s right whale ecology program director. “Our trajectory is going up while the total number of right whales is going down, fairly steeply.”
The center has studied the right whales in the bay for several decades, currently with airplane surveys for population counts and boat surveys to identify food densities in the water. The data collected is used, in part, to help the state Division of Marine Fisheries place and lift restrictions in the bay on trap gear fishing and vessel speeds.
The right whales — now considered at risk of extinction in the coming decades along the Atlantic coast due to deaths and injuries from being caught in fishing rope and hit by ships — have a current population of around 411. They typically arrive to feed in Cape Cod Bay in late winter and leave by the end of April, along an annual migratory path that stretches from Florida to Canada.
So far, the center has confirmed 267 individual right whales seen by either plane or boat for the current season, making that roughly 65 percent of the estimated total population. Considering the complete range of the whales’ migration along the East Coast, the concentration in the relatively small area known as Cape Cod Bay is “remarkable,” Mayo said.