Scientists on research vessel spot rare whales in Bering Sea

U.S. federal researchers studying criticallyendangered North Pacific right whales sometimes go years withoutfinding their subjects. Over the weekend they got lucky.

A research vessel in the Bering Sea photographed two of theanimals Sunday and obtained a biopsy sample from one, the NationalOceanic and Atmospheric Administration announced Thursday.

NOAA Fisheries research biologist Jessica Crance was on board theYushin Maru 2, when the whales were spotted. The ship is part of thePacific Ocean Whale and Ecosystem Research program, a collaborativeeffort headed by the International Whaling Commission. Using anacoustic recorder, and between sounds of killer whales and walrus,Crance picked up faint calls of a right whale east of Bristol Bay,Alaska.

The sounds came from an estimated 16 to 51kilometresaway and the ship headed west, she said in a blog entry.After four and a half hours, despite the presence of minke andhumpback whales, and only a few calls from the right whales, therare animals were spotted.

The two right whales are part of the eastern stock that numberjust 30 to 50 whales, said Phillip Clapham, head of the cetaceanprogram at NOAA's Alaska Fisheries Science Center in Seattle.

A French whaling ship recorded the first kill in 1835 andreported seeing "millions" of others. That claim was exaggerated
but it drew hundreds of other whalers to the Gulf of Alaska and theBering Sea, Clapham said.

Within 14 years, Clapham said, the overharvest of the slow,buoyant animals sent many whalers through the Bering Strait to huntbowhead whales instead.

A modest comeback of right whales in the 20th century wasderailed when Soviet whalers in the 1960s ignored critically lownumbers and illegally killed eastern stock right whales in the Gulfof Alaska, Clapham said.

The right whale sampled Sunday had been seen eight times before,Clapham said. The last time was a decade ago.

A biopsy sample, he said, can positively identify the animal,reveal its gender, indicate whether it's pregnant and reveal information on diet and reproductive hormones.

Studying North Pacific right whales is complicated by the expenseof reaching their habitat in the Gulf of Alaska and the Bering Sea.

Critical data remains unknown, including their winter habits andmany of their preferred summer feeding areas for copepods, a tinycrustacean plankton.

"We don't know what habitats continue to be important to thespecies," Clapham said.

The biggest threats to the animals are fishing gear entanglementsand ship strikes, Clapham said.