Ship propeller on the Pope's Stress Trigger

Researchers from the United States revealed that the noise caused by the ship could actually lead to the pope stressed. The resulting sound is due to the propellers of ships have the same frequency with the frequency used to communicate with whales.

As quoted from the pages of the BBC, the pope was to change their communication patterns in a noisy place.

These researchers have measured the stress hormone from whale faeces or sewage. They found that this stress hormone increases with increasing density of marine traffic.

The study was conducted in the Bay of Fundy, Canada, the northern Atlantic Ocean. In this region the whales listed as endangered animals.

Since several hundred years ago, whaling conducted by the Basque people allegedly cause a decline in whale populations. However, recent research shows, this population has been declining ever, the cause of which remains unclear.

Dr. Rosalind Rolland of the New England Aquarium in London, who led the study, said that the whale population has now increased to 490 tubs of 350 years ago.

However, it should be noted also that the flow of marine traffic in the United States dropped dramatically post-September 11, 2001.

The researchers said the current noise level recorded up to 6 decibels, which continued to decrease in the surface, with the change of frequencies below 150 Hz.

This research has been spent over five years to collect the faeces. The trick was fairly unique, well-trained dog to 'mentor' the researchers found the material faeces.

"This is the first time there is documentation of the effects of physiology, was carried out on animals weighing 50 tons, so this is not an easy thing to do," said Rolland, as quoted from the pages of the BBC.

"Previous research has shown them to change their patterns of vocalization sounds in noisy environments. But this is the first time documented the physiological stress," he continued.

In the Bay of Fundy is the site of his own research, marine traffic has been relocated so far away from where the breeding of whales since 2003. At least, the impact of marine vessels is reduced by 80 to 90 percent.