Whale migration seen from the air

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Whale migration seen from the air

Written by Mike Lee 8:16 a.m., Jan. 18, 2012

 Photographed on the west side of Santa Catalina Island, this group of gray whales is headed south to the calving grounds off Baja California. — Wayne Perryman/NMFS

Most San Diegans know about the annual gray whale migration off our shores, but few have seen it like Wayne Perryman is seeing it this month.
The cetacean researcher at the federal Southwest Fisheries Science Center in La Jolla has been flying along the Southern California coast using a high-tech system of cameras mounted on a NOAA plane to capture images of migrating grays.

A pregnant female migrates toward Baja California. "Notice how wide she looks," said photographer Wayne Perryman at the National Marine Fisheries Service. "In large whales, just as it is in humans, changes in reproductive and nutritive condition are reflected by changes in shape." — Wayne Perryman/NMFS

It's more than just a photo op: Technicians will go through each frame to assess the size and shape of the whales and compare that information to similar data collected in recent decades. Among other things, Perryman will be looking for any connections to climate change — say, diet-driven changes in the size of gray whales.

Overall, Perryman said the gray whale population in the eastern North Pacific Ocean appears to be “very healthy” but measurements might reveal trends that aren’t obvious to the casual observer.

"In the fall, gray whales migrate from their summer feeding grounds, heading south along the coast of North America to spend the winter in their breeding and calving areas off the coast of Baja California, Mexico," according to NOAA. "Calves are born in shallow lagoons and bays from early January to mid-February.

From mid-February to May, the Eastern North Pacific stock of gray whales can be seen migrating northward with newborn calves along the West Coast of the U.S."

Source: http://www.utsandiego.com/news/2012/jan/18/whale-migration-seen-air/

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