Humpback whales make a comeback

Once hunted to the brink of extinction, humpback whales have made a dramatic comeback in the North Pacific Ocean over the past four decades, a new study said today.

The study released by Splash, an international organisation of more than 400 whale watchers, estimates there were between 18,000 and 20,000 of the majestic mammals in the North Pacific in 2004-2006.

Their population had dwindled to less than 1,500 before hunting of humpbacks was banned worldwide in 1966.

“It’s not a complete success, but it’s definitely very encouraging in terms of the recovery of the species,” said Jeff Walters, co-manager of the Hawaiian Islands Humpback Whale National Marine Sanctuary.

The study, sponsored by the National Oceanic and Atmospheric Administration, is the most comprehensive analysis ever of any large whale population, said David Mattila, science co-ordinator for the sanctuary.

At least half of the humpback whales migrate between Alaska and Hawaii, and that population is the healthiest, Mattila said.

But isolated populations that migrate from Japan and the Philippines to Russia are taking longer to recover after whaling operations stopped, he said.

“Whales are long-lived and give birth one at a time .... so if the population gets pushed too low, it may take quite awhile to come back. Maybe that’s what’s happening in the west,” Mattila said.

The whales are protected under US federal laws.

Their resurgence could spark a debate over whether they should still be considered endangered, said Naomi McIntosh, superintendent for the humpback sanctuary.

“Those discussions are bound to happen, and we knew that going into the study, we anticipated it,” she said. “I think it’s too early to make that call.”

The whale count was made based on data collected from Hawaii, Mexico, Asia, Central America, Russia, the Aleutians, Canada and the north-west coast of the US.