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Orca death may link to pregnancy issues

Puget Sound orcas known as the J-pod swim together in Spieden Channel, north of San Juan Island, on Nov. 29. (Associated Press)
Puget Sound orcas known as the J-pod swim together in Spieden Channel, north of San Juan Island, on Nov. 29. (Associated Press)
Phuong Le Associated Press

SEATTLE – The death of an endangered Puget Sound orca found on Vancouver Island in Canada might have been related to pregnancy issues, a research group said Friday.

The 18-year-old female that washed ashore Thursday was a member of the J-pod, one of three families of southern resident killer whales that spend time in the inland waters of Washington and Canada.

“There were 78. There are now 77. We’re going down, and it’s tragic,” said Ken Balcomb, a senior scientist with the Center for Whale Research, which keeps a census of the animals.

Balcomb planned to travel to British Columbia to assist Canadian authorities in a necropsy today to determine the cause of death.

From photo observations, he said, the whale’s “belly looks low and extended, and it could be that the fetus died in utero.”

Stephen Raverty, a veterinary pathologist with Canada’s Ministry of Agriculture and Lands, will lead the necropsy. He said he has seen two photos of the stranded orca and also believes it was pregnant.

“Based on historical information and clinical observations, the whale’s death may have arisen from pregnancy or complications of birth,” he said.

Balcomb said the death was another blow to the population that was listed as endangered in 2005.

A newborn orca born in early September was recently presumed dead. Two additional whales were confirmed missing and presumed dead earlier this year.

The population numbered more than 140 animals decades ago but declined to a low of 71 in the 1970s when dozens of the mammals were captured to be displayed at marine parks and aquariums.

Scientists will examine the organs and take tissue samples of the whale found dead on Vancouver Island. Along with determining its cause of death, they’re interested in tracking diseases and other issues to understand health implications for the entire population.

The whale found Thursday was last seen in Puget Sound in late November and last photographed on Nov. 26 with her family east of Victoria, according to Orca Network.

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