Sydney, Sep 2 (Inditop.com) Secret Soviet whaling between 1947 and 1973 wiped out some humpback whale population in the Pacific, according to a new study.

Wally Franklin, doctoral student at the Sydney based Southern Cross University’s Whale Research Centre and co-director of The Oceania Project, co-authored the paper.

While it had been known that almost 100,000 whales had been killed secretly by the Soviet whaling fleet in the southern hemisphere, it had not been clear how this had impacted the current humpback whale population, Franklin said

“It was always a mystery why the population of humpback whales off the east coast of Australia and in the Pacific region suddenly collapsed in the early 1960s,” Franklin said.

“This new study has shown the link between the illegal catches during the late 1950s and early 1960s and the collapse of the Australian and Pacific populations.”

During the 1950s the whaling stations at Tangalooma (in Queensland) and Byron Bay each had a quota of whales which they could usually get in a couple of days.

“By the early 1960s, all of a sudden they just couldn’t find any whales to meet the quotas and basically the industry collapsed,” Franklin said.

“On the figures reported to the International Whaling Commission (IWC) that shouldn’t have happened.” Franklin said it had been surmised that more whales had been taken by the Soviets than were reported, but it was not until the late 1990s that the data confirmed it.

“The Russians took about 25,000 whales in the years from 1959 to 1961, of which only a fraction were officially reported to the IWC,” he said.

“Our study has now linked the reported catches and the data recording the illegal catches with the breeding areas in Antarctica, confirming suspicions that these illegal catches on top of earlier whaling did lead to the collapse of these populations.

“It’s been established that only around 150 humpback whales survived out of those Pacific and east Australian populations, from what we believe to have been pre-whaling numbers of between 45,000 and 65,000 whales.”

These findings were presented to the International Whaling Commission meeting in Portugal earlier this year, said a Southern Cross release.